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+Metadata-Version: 2.1
+Name: attrs
+Version: 21.4.0
+Summary: Classes Without Boilerplate
+Home-page: https://www.attrs.org/
+Author: Hynek Schlawack
+Author-email: hs@ox.cx
+Maintainer: Hynek Schlawack
+Maintainer-email: hs@ox.cx
+License: MIT
+Project-URL: Documentation, https://www.attrs.org/
+Project-URL: Changelog, https://www.attrs.org/en/stable/changelog.html
+Project-URL: Bug Tracker, https://github.com/python-attrs/attrs/issues
+Project-URL: Source Code, https://github.com/python-attrs/attrs
+Project-URL: Funding, https://github.com/sponsors/hynek
+Project-URL: Tidelift, https://tidelift.com/subscription/pkg/pypi-attrs?utm_source=pypi-attrs&utm_medium=pypi
+Project-URL: Ko-fi, https://ko-fi.com/the_hynek
+Keywords: class,attribute,boilerplate
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: Natural Language :: English
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+Description-Content-Type: text/x-rst
+License-File: LICENSE
+License-File: AUTHORS.rst
+Provides-Extra: dev
+Requires-Dist: coverage[toml] (>=5.0.2) ; extra == 'dev'
+Requires-Dist: hypothesis ; extra == 'dev'
+Requires-Dist: pympler ; extra == 'dev'
+Requires-Dist: pytest (>=4.3.0) ; extra == 'dev'
+Requires-Dist: six ; extra == 'dev'
+Requires-Dist: mypy ; extra == 'dev'
+Requires-Dist: pytest-mypy-plugins ; extra == 'dev'
+Requires-Dist: zope.interface ; extra == 'dev'
+Requires-Dist: furo ; extra == 'dev'
+Requires-Dist: sphinx ; extra == 'dev'
+Requires-Dist: sphinx-notfound-page ; extra == 'dev'
+Requires-Dist: pre-commit ; extra == 'dev'
+Requires-Dist: cloudpickle ; (platform_python_implementation == "CPython") and extra == 'dev'
+Provides-Extra: docs
+Requires-Dist: furo ; extra == 'docs'
+Requires-Dist: sphinx ; extra == 'docs'
+Requires-Dist: zope.interface ; extra == 'docs'
+Requires-Dist: sphinx-notfound-page ; extra == 'docs'
+Provides-Extra: tests
+Requires-Dist: coverage[toml] (>=5.0.2) ; extra == 'tests'
+Requires-Dist: hypothesis ; extra == 'tests'
+Requires-Dist: pympler ; extra == 'tests'
+Requires-Dist: pytest (>=4.3.0) ; extra == 'tests'
+Requires-Dist: six ; extra == 'tests'
+Requires-Dist: mypy ; extra == 'tests'
+Requires-Dist: pytest-mypy-plugins ; extra == 'tests'
+Requires-Dist: zope.interface ; extra == 'tests'
+Requires-Dist: cloudpickle ; (platform_python_implementation == "CPython") and extra == 'tests'
+Provides-Extra: tests_no_zope
+Requires-Dist: coverage[toml] (>=5.0.2) ; extra == 'tests_no_zope'
+Requires-Dist: hypothesis ; extra == 'tests_no_zope'
+Requires-Dist: pympler ; extra == 'tests_no_zope'
+Requires-Dist: pytest (>=4.3.0) ; extra == 'tests_no_zope'
+Requires-Dist: six ; extra == 'tests_no_zope'
+Requires-Dist: mypy ; extra == 'tests_no_zope'
+Requires-Dist: pytest-mypy-plugins ; extra == 'tests_no_zope'
+Requires-Dist: cloudpickle ; (platform_python_implementation == "CPython") and extra == 'tests_no_zope'
+
+
+.. image:: https://www.attrs.org/en/stable/_static/attrs_logo.png
+   :alt: attrs logo
+   :align: center
+
+
+``attrs`` is the Python package that will bring back the **joy** of **writing classes** by relieving you from the drudgery of implementing object protocols (aka `dunder methods <https://www.attrs.org/en/latest/glossary.html#term-dunder-methods>`_).
+`Trusted by NASA <https://docs.github.com/en/account-and-profile/setting-up-and-managing-your-github-profile/customizing-your-profile/personalizing-your-profile#list-of-qualifying-repositories-for-mars-2020-helicopter-contributor-badge>`_ for Mars missions since 2020!
+
+Its main goal is to help you to write **concise** and **correct** software without slowing down your code.
+
+.. teaser-end
+
+For that, it gives you a class decorator and a way to declaratively define the attributes on that class:
+
+.. -code-begin-
+
+.. code-block:: pycon
+
+   >>> from attrs import asdict, define, make_class, Factory
+
+   >>> @define
+   ... class SomeClass:
+   ...     a_number: int = 42
+   ...     list_of_numbers: list[int] = Factory(list)
+   ...
+   ...     def hard_math(self, another_number):
+   ...         return self.a_number + sum(self.list_of_numbers) * another_number
+
+
+   >>> sc = SomeClass(1, [1, 2, 3])
+   >>> sc
+   SomeClass(a_number=1, list_of_numbers=[1, 2, 3])
+
+   >>> sc.hard_math(3)
+   19
+   >>> sc == SomeClass(1, [1, 2, 3])
+   True
+   >>> sc != SomeClass(2, [3, 2, 1])
+   True
+
+   >>> asdict(sc)
+   {'a_number': 1, 'list_of_numbers': [1, 2, 3]}
+
+   >>> SomeClass()
+   SomeClass(a_number=42, list_of_numbers=[])
+
+   >>> C = make_class("C", ["a", "b"])
+   >>> C("foo", "bar")
+   C(a='foo', b='bar')
+
+
+After *declaring* your attributes ``attrs`` gives you:
+
+- a concise and explicit overview of the class's attributes,
+- a nice human-readable ``__repr__``,
+- a equality-checking methods,
+- an initializer,
+- and much more,
+
+*without* writing dull boilerplate code again and again and *without* runtime performance penalties.
+
+**Hate type annotations**!?
+No problem!
+Types are entirely **optional** with ``attrs``.
+Simply assign ``attrs.field()`` to the attributes instead of annotating them with types.
+
+----
+
+This example uses ``attrs``'s modern APIs that have been introduced in version 20.1.0, and the ``attrs`` package import name that has been added in version 21.3.0.
+The classic APIs (``@attr.s``, ``attr.ib``, plus their serious business aliases) and the ``attr`` package import name will remain **indefinitely**.
+
+Please check out `On The Core API Names <https://www.attrs.org/en/latest/names.html>`_ for a more in-depth explanation.
+
+
+Data Classes
+============
+
+On the tin, ``attrs`` might remind you of ``dataclasses`` (and indeed, ``dataclasses`` are a descendant of ``attrs``).
+In practice it does a lot more and is more flexible.
+For instance it allows you to define `special handling of NumPy arrays for equality checks <https://www.attrs.org/en/stable/comparison.html#customization>`_, or allows more ways to `plug into the initialization process <https://www.attrs.org/en/stable/init.html#hooking-yourself-into-initialization>`_.
+
+For more details, please refer to our `comparison page <https://www.attrs.org/en/stable/why.html#data-classes>`_.
+
+
+.. -getting-help-
+
+Getting Help
+============
+
+Please use the ``python-attrs`` tag on `Stack Overflow <https://stackoverflow.com/questions/tagged/python-attrs>`_ to get help.
+
+Answering questions of your fellow developers is also a great way to help the project!
+
+
+.. -project-information-
+
+Project Information
+===================
+
+``attrs`` is released under the `MIT <https://choosealicense.com/licenses/mit/>`_ license,
+its documentation lives at `Read the Docs <https://www.attrs.org/>`_,
+the code on `GitHub <https://github.com/python-attrs/attrs>`_,
+and the latest release on `PyPI <https://pypi.org/project/attrs/>`_.
+It’s rigorously tested on Python 2.7, 3.5+, and PyPy.
+
+We collect information on **third-party extensions** in our `wiki <https://github.com/python-attrs/attrs/wiki/Extensions-to-attrs>`_.
+Feel free to browse and add your own!
+
+If you'd like to contribute to ``attrs`` you're most welcome and we've written `a little guide <https://github.com/python-attrs/attrs/blob/main/.github/CONTRIBUTING.md>`_ to get you started!
+
+
+``attrs`` for Enterprise
+------------------------
+
+Available as part of the Tidelift Subscription.
+
+The maintainers of ``attrs`` and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source packages you use to build your applications.
+Save time, reduce risk, and improve code health, while paying the maintainers of the exact packages you use.
+`Learn more. <https://tidelift.com/subscription/pkg/pypi-attrs?utm_source=pypi-attrs&utm_medium=referral&utm_campaign=enterprise&utm_term=repo>`_
+
+
+Release Information
+===================
+
+21.4.0 (2021-12-29)
+-------------------
+
+Changes
+^^^^^^^
+
+- Fixed the test suite on PyPy3.8 where ``cloudpickle`` does not work.
+  `#892 <https://github.com/python-attrs/attrs/issues/892>`_
+- Fixed ``coverage report`` for projects that use ``attrs`` and don't set a ``--source``.
+  `#895 <https://github.com/python-attrs/attrs/issues/895>`_,
+  `#896 <https://github.com/python-attrs/attrs/issues/896>`_
+
+`Full changelog <https://www.attrs.org/en/stable/changelog.html>`_.
+
+Credits
+=======
+
+``attrs`` is written and maintained by `Hynek Schlawack <https://hynek.me/>`_.
+
+The development is kindly supported by `Variomedia AG <https://www.variomedia.de/>`_.
+
+A full list of contributors can be found in `GitHub's overview <https://github.com/python-attrs/attrs/graphs/contributors>`_.
+
+It’s the spiritual successor of `characteristic <https://characteristic.readthedocs.io/>`_ and aspires to fix some of it clunkiness and unfortunate decisions.
+Both were inspired by Twisted’s `FancyEqMixin <https://twistedmatrix.com/documents/current/api/twisted.python.util.FancyEqMixin.html>`_ but both are implemented using class decorators because `subclassing is bad for you <https://www.youtube.com/watch?v=3MNVP9-hglc>`_, m’kay?
+
+

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+Tag: py2-none-any
+Tag: py3-none-any
+

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/attrs-21.4.0.dist-info/top_level.txt

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+attr
+attrs

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/click/_termui_impl.py

@@ -0,0 +1,717 @@
+"""
+This module contains implementations for the termui module. To keep the
+import time of Click down, some infrequently used functionality is
+placed in this module and only imported as needed.
+"""
+import contextlib
+import math
+import os
+import sys
+import time
+import typing as t
+from gettext import gettext as _
+
+from ._compat import _default_text_stdout
+from ._compat import CYGWIN
+from ._compat import get_best_encoding
+from ._compat import isatty
+from ._compat import open_stream
+from ._compat import strip_ansi
+from ._compat import term_len
+from ._compat import WIN
+from .exceptions import ClickException
+from .utils import echo
+
+V = t.TypeVar("V")
+
+if os.name == "nt":
+    BEFORE_BAR = "\r"
+    AFTER_BAR = "\n"
+else:
+    BEFORE_BAR = "\r\033[?25l"
+    AFTER_BAR = "\033[?25h\n"
+
+
+class ProgressBar(t.Generic[V]):
+    def __init__(
+        self,
+        iterable: t.Optional[t.Iterable[V]],
+        length: t.Optional[int] = None,
+        fill_char: str = "#",
+        empty_char: str = " ",
+        bar_template: str = "%(bar)s",
+        info_sep: str = "  ",
+        show_eta: bool = True,
+        show_percent: t.Optional[bool] = None,
+        show_pos: bool = False,
+        item_show_func: t.Optional[t.Callable[[t.Optional[V]], t.Optional[str]]] = None,
+        label: t.Optional[str] = None,
+        file: t.Optional[t.TextIO] = None,
+        color: t.Optional[bool] = None,
+        update_min_steps: int = 1,
+        width: int = 30,
+    ) -> None:
+        self.fill_char = fill_char
+        self.empty_char = empty_char
+        self.bar_template = bar_template
+        self.info_sep = info_sep
+        self.show_eta = show_eta
+        self.show_percent = show_percent
+        self.show_pos = show_pos
+        self.item_show_func = item_show_func
+        self.label = label or ""
+        if file is None:
+            file = _default_text_stdout()
+        self.file = file
+        self.color = color
+        self.update_min_steps = update_min_steps
+        self._completed_intervals = 0
+        self.width = width
+        self.autowidth = width == 0
+
+        if length is None:
+            from operator import length_hint
+
+            length = length_hint(iterable, -1)
+
+            if length == -1:
+                length = None
+        if iterable is None:
+            if length is None:
+                raise TypeError("iterable or length is required")
+            iterable = t.cast(t.Iterable[V], range(length))
+        self.iter = iter(iterable)
+        self.length = length
+        self.pos = 0
+        self.avg: t.List[float] = []
+        self.start = self.last_eta = time.time()
+        self.eta_known = False
+        self.finished = False
+        self.max_width: t.Optional[int] = None
+        self.entered = False
+        self.current_item: t.Optional[V] = None
+        self.is_hidden = not isatty(self.file)
+        self._last_line: t.Optional[str] = None
+
+    def __enter__(self) -> "ProgressBar":
+        self.entered = True
+        self.render_progress()
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):  # type: ignore
+        self.render_finish()
+
+    def __iter__(self) -> t.Iterator[V]:
+        if not self.entered:
+            raise RuntimeError("You need to use progress bars in a with block.")
+        self.render_progress()
+        return self.generator()
+
+    def __next__(self) -> V:
+        # Iteration is defined in terms of a generator function,
+        # returned by iter(self); use that to define next(). This works
+        # because `self.iter` is an iterable consumed by that generator,
+        # so it is re-entry safe. Calling `next(self.generator())`
+        # twice works and does "what you want".
+        return next(iter(self))
+
+    def render_finish(self) -> None:
+        if self.is_hidden:
+            return
+        self.file.write(AFTER_BAR)
+        self.file.flush()
+
+    @property
+    def pct(self) -> float:
+        if self.finished:
+            return 1.0
+        return min(self.pos / (float(self.length or 1) or 1), 1.0)
+
+    @property
+    def time_per_iteration(self) -> float:
+        if not self.avg:
+            return 0.0
+        return sum(self.avg) / float(len(self.avg))
+
+    @property
+    def eta(self) -> float:
+        if self.length is not None and not self.finished:
+            return self.time_per_iteration * (self.length - self.pos)
+        return 0.0
+
+    def format_eta(self) -> str:
+        if self.eta_known:
+            t = int(self.eta)
+            seconds = t % 60
+            t //= 60
+            minutes = t % 60
+            t //= 60
+            hours = t % 24
+            t //= 24
+            if t > 0:
+                return f"{t}d {hours:02}:{minutes:02}:{seconds:02}"
+            else:
+                return f"{hours:02}:{minutes:02}:{seconds:02}"
+        return ""
+
+    def format_pos(self) -> str:
+        pos = str(self.pos)
+        if self.length is not None:
+            pos += f"/{self.length}"
+        return pos
+
+    def format_pct(self) -> str:
+        return f"{int(self.pct * 100): 4}%"[1:]
+
+    def format_bar(self) -> str:
+        if self.length is not None:
+            bar_length = int(self.pct * self.width)
+            bar = self.fill_char * bar_length
+            bar += self.empty_char * (self.width - bar_length)
+        elif self.finished:
+            bar = self.fill_char * self.width
+        else:
+            chars = list(self.empty_char * (self.width or 1))
+            if self.time_per_iteration != 0:
+                chars[
+                    int(
+                        (math.cos(self.pos * self.time_per_iteration) / 2.0 + 0.5)
+                        * self.width
+                    )
+                ] = self.fill_char
+            bar = "".join(chars)
+        return bar
+
+    def format_progress_line(self) -> str:
+        show_percent = self.show_percent
+
+        info_bits = []
+        if self.length is not None and show_percent is None:
+            show_percent = not self.show_pos
+
+        if self.show_pos:
+            info_bits.append(self.format_pos())
+        if show_percent:
+            info_bits.append(self.format_pct())
+        if self.show_eta and self.eta_known and not self.finished:
+            info_bits.append(self.format_eta())
+        if self.item_show_func is not None:
+            item_info = self.item_show_func(self.current_item)
+            if item_info is not None:
+                info_bits.append(item_info)
+
+        return (
+            self.bar_template
+            % {
+                "label": self.label,
+                "bar": self.format_bar(),
+                "info": self.info_sep.join(info_bits),
+            }
+        ).rstrip()
+
+    def render_progress(self) -> None:
+        import shutil
+
+        if self.is_hidden:
+            # Only output the label as it changes if the output is not a
+            # TTY. Use file=stderr if you expect to be piping stdout.
+            if self._last_line != self.label:
+                self._last_line = self.label
+                echo(self.label, file=self.file, color=self.color)
+
+            return
+
+        buf = []
+        # Update width in case the terminal has been resized
+        if self.autowidth:
+            old_width = self.width
+            self.width = 0
+            clutter_length = term_len(self.format_progress_line())
+            new_width = max(0, shutil.get_terminal_size().columns - clutter_length)
+            if new_width < old_width:
+                buf.append(BEFORE_BAR)
+                buf.append(" " * self.max_width)  # type: ignore
+                self.max_width = new_width
+            self.width = new_width
+
+        clear_width = self.width
+        if self.max_width is not None:
+            clear_width = self.max_width
+
+        buf.append(BEFORE_BAR)
+        line = self.format_progress_line()
+        line_len = term_len(line)
+        if self.max_width is None or self.max_width < line_len:
+            self.max_width = line_len
+
+        buf.append(line)
+        buf.append(" " * (clear_width - line_len))
+        line = "".join(buf)
+        # Render the line only if it changed.
+
+        if line != self._last_line:
+            self._last_line = line
+            echo(line, file=self.file, color=self.color, nl=False)
+            self.file.flush()
+
+    def make_step(self, n_steps: int) -> None:
+        self.pos += n_steps
+        if self.length is not None and self.pos >= self.length:
+            self.finished = True
+
+        if (time.time() - self.last_eta) < 1.0:
+            return
+
+        self.last_eta = time.time()
+
+        # self.avg is a rolling list of length <= 7 of steps where steps are
+        # defined as time elapsed divided by the total progress through
+        # self.length.
+        if self.pos:
+            step = (time.time() - self.start) / self.pos
+        else:
+            step = time.time() - self.start
+
+        self.avg = self.avg[-6:] + [step]
+
+        self.eta_known = self.length is not None
+
+    def update(self, n_steps: int, current_item: t.Optional[V] = None) -> None:
+        """Update the progress bar by advancing a specified number of
+        steps, and optionally set the ``current_item`` for this new
+        position.
+
+        :param n_steps: Number of steps to advance.
+        :param current_item: Optional item to set as ``current_item``
+            for the updated position.
+
+        .. versionchanged:: 8.0
+            Added the ``current_item`` optional parameter.
+
+        .. versionchanged:: 8.0
+            Only render when the number of steps meets the
+            ``update_min_steps`` threshold.
+        """
+        if current_item is not None:
+            self.current_item = current_item
+
+        self._completed_intervals += n_steps
+
+        if self._completed_intervals >= self.update_min_steps:
+            self.make_step(self._completed_intervals)
+            self.render_progress()
+            self._completed_intervals = 0
+
+    def finish(self) -> None:
+        self.eta_known = False
+        self.current_item = None
+        self.finished = True
+
+    def generator(self) -> t.Iterator[V]:
+        """Return a generator which yields the items added to the bar
+        during construction, and updates the progress bar *after* the
+        yielded block returns.
+        """
+        # WARNING: the iterator interface for `ProgressBar` relies on
+        # this and only works because this is a simple generator which
+        # doesn't create or manage additional state. If this function
+        # changes, the impact should be evaluated both against
+        # `iter(bar)` and `next(bar)`. `next()` in particular may call
+        # `self.generator()` repeatedly, and this must remain safe in
+        # order for that interface to work.
+        if not self.entered:
+            raise RuntimeError("You need to use progress bars in a with block.")
+
+        if self.is_hidden:
+            yield from self.iter
+        else:
+            for rv in self.iter:
+                self.current_item = rv
+
+                # This allows show_item_func to be updated before the
+                # item is processed. Only trigger at the beginning of
+                # the update interval.
+                if self._completed_intervals == 0:
+                    self.render_progress()
+
+                yield rv
+                self.update(1)
+
+            self.finish()
+            self.render_progress()
+
+
+def pager(generator: t.Iterable[str], color: t.Optional[bool] = None) -> None:
+    """Decide what method to use for paging through text."""
+    stdout = _default_text_stdout()
+    if not isatty(sys.stdin) or not isatty(stdout):
+        return _nullpager(stdout, generator, color)
+    pager_cmd = (os.environ.get("PAGER", None) or "").strip()
+    if pager_cmd:
+        if WIN:
+            return _tempfilepager(generator, pager_cmd, color)
+        return _pipepager(generator, pager_cmd, color)
+    if os.environ.get("TERM") in ("dumb", "emacs"):
+        return _nullpager(stdout, generator, color)
+    if WIN or sys.platform.startswith("os2"):
+        return _tempfilepager(generator, "more <", color)
+    if hasattr(os, "system") and os.system("(less) 2>/dev/null") == 0:
+        return _pipepager(generator, "less", color)
+
+    import tempfile
+
+    fd, filename = tempfile.mkstemp()
+    os.close(fd)
+    try:
+        if hasattr(os, "system") and os.system(f'more "{filename}"') == 0:
+            return _pipepager(generator, "more", color)
+        return _nullpager(stdout, generator, color)
+    finally:
+        os.unlink(filename)
+
+
+def _pipepager(generator: t.Iterable[str], cmd: str, color: t.Optional[bool]) -> None:
+    """Page through text by feeding it to another program.  Invoking a
+    pager through this might support colors.
+    """
+    import subprocess
+
+    env = dict(os.environ)
+
+    # If we're piping to less we might support colors under the
+    # condition that
+    cmd_detail = cmd.rsplit("/", 1)[-1].split()
+    if color is None and cmd_detail[0] == "less":
+        less_flags = f"{os.environ.get('LESS', '')}{' '.join(cmd_detail[1:])}"
+        if not less_flags:
+            env["LESS"] = "-R"
+            color = True
+        elif "r" in less_flags or "R" in less_flags:
+            color = True
+
+    c = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE, env=env)
+    stdin = t.cast(t.BinaryIO, c.stdin)
+    encoding = get_best_encoding(stdin)
+    try:
+        for text in generator:
+            if not color:
+                text = strip_ansi(text)
+
+            stdin.write(text.encode(encoding, "replace"))
+    except (OSError, KeyboardInterrupt):
+        pass
+    else:
+        stdin.close()
+
+    # Less doesn't respect ^C, but catches it for its own UI purposes (aborting
+    # search or other commands inside less).
+    #
+    # That means when the user hits ^C, the parent process (click) terminates,
+    # but less is still alive, paging the output and messing up the terminal.
+    #
+    # If the user wants to make the pager exit on ^C, they should set
+    # `LESS='-K'`. It's not our decision to make.
+    while True:
+        try:
+            c.wait()
+        except KeyboardInterrupt:
+            pass
+        else:
+            break
+
+
+def _tempfilepager(
+    generator: t.Iterable[str], cmd: str, color: t.Optional[bool]
+) -> None:
+    """Page through text by invoking a program on a temporary file."""
+    import tempfile
+
+    fd, filename = tempfile.mkstemp()
+    # TODO: This never terminates if the passed generator never terminates.
+    text = "".join(generator)
+    if not color:
+        text = strip_ansi(text)
+    encoding = get_best_encoding(sys.stdout)
+    with open_stream(filename, "wb")[0] as f:
+        f.write(text.encode(encoding))
+    try:
+        os.system(f'{cmd} "{filename}"')
+    finally:
+        os.close(fd)
+        os.unlink(filename)
+
+
+def _nullpager(
+    stream: t.TextIO, generator: t.Iterable[str], color: t.Optional[bool]
+) -> None:
+    """Simply print unformatted text.  This is the ultimate fallback."""
+    for text in generator:
+        if not color:
+            text = strip_ansi(text)
+        stream.write(text)
+
+
+class Editor:
+    def __init__(
+        self,
+        editor: t.Optional[str] = None,
+        env: t.Optional[t.Mapping[str, str]] = None,
+        require_save: bool = True,
+        extension: str = ".txt",
+    ) -> None:
+        self.editor = editor
+        self.env = env
+        self.require_save = require_save
+        self.extension = extension
+
+    def get_editor(self) -> str:
+        if self.editor is not None:
+            return self.editor
+        for key in "VISUAL", "EDITOR":
+            rv = os.environ.get(key)
+            if rv:
+                return rv
+        if WIN:
+            return "notepad"
+        for editor in "sensible-editor", "vim", "nano":
+            if os.system(f"which {editor} >/dev/null 2>&1") == 0:
+                return editor
+        return "vi"
+
+    def edit_file(self, filename: str) -> None:
+        import subprocess
+
+        editor = self.get_editor()
+        environ: t.Optional[t.Dict[str, str]] = None
+
+        if self.env:
+            environ = os.environ.copy()
+            environ.update(self.env)
+
+        try:
+            c = subprocess.Popen(f'{editor} "{filename}"', env=environ, shell=True)
+            exit_code = c.wait()
+            if exit_code != 0:
+                raise ClickException(
+                    _("{editor}: Editing failed").format(editor=editor)
+                )
+        except OSError as e:
+            raise ClickException(
+                _("{editor}: Editing failed: {e}").format(editor=editor, e=e)
+            ) from e
+
+    def edit(self, text: t.Optional[t.AnyStr]) -> t.Optional[t.AnyStr]:
+        import tempfile
+
+        if not text:
+            data = b""
+        elif isinstance(text, (bytes, bytearray)):
+            data = text
+        else:
+            if text and not text.endswith("\n"):
+                text += "\n"
+
+            if WIN:
+                data = text.replace("\n", "\r\n").encode("utf-8-sig")
+            else:
+                data = text.encode("utf-8")
+
+        fd, name = tempfile.mkstemp(prefix="editor-", suffix=self.extension)
+        f: t.BinaryIO
+
+        try:
+            with os.fdopen(fd, "wb") as f:
+                f.write(data)
+
+            # If the filesystem resolution is 1 second, like Mac OS
+            # 10.12 Extended, or 2 seconds, like FAT32, and the editor
+            # closes very fast, require_save can fail. Set the modified
+            # time to be 2 seconds in the past to work around this.
+            os.utime(name, (os.path.getatime(name), os.path.getmtime(name) - 2))
+            # Depending on the resolution, the exact value might not be
+            # recorded, so get the new recorded value.
+            timestamp = os.path.getmtime(name)
+
+            self.edit_file(name)
+
+            if self.require_save and os.path.getmtime(name) == timestamp:
+                return None
+
+            with open(name, "rb") as f:
+                rv = f.read()
+
+            if isinstance(text, (bytes, bytearray)):
+                return rv
+
+            return rv.decode("utf-8-sig").replace("\r\n", "\n")  # type: ignore
+        finally:
+            os.unlink(name)
+
+
+def open_url(url: str, wait: bool = False, locate: bool = False) -> int:
+    import subprocess
+
+    def _unquote_file(url: str) -> str:
+        from urllib.parse import unquote
+
+        if url.startswith("file://"):
+            url = unquote(url[7:])
+
+        return url
+
+    if sys.platform == "darwin":
+        args = ["open"]
+        if wait:
+            args.append("-W")
+        if locate:
+            args.append("-R")
+        args.append(_unquote_file(url))
+        null = open("/dev/null", "w")
+        try:
+            return subprocess.Popen(args, stderr=null).wait()
+        finally:
+            null.close()
+    elif WIN:
+        if locate:
+            url = _unquote_file(url.replace('"', ""))
+            args = f'explorer /select,"{url}"'
+        else:
+            url = url.replace('"', "")
+            wait_str = "/WAIT" if wait else ""
+            args = f'start {wait_str} "" "{url}"'
+        return os.system(args)
+    elif CYGWIN:
+        if locate:
+            url = os.path.dirname(_unquote_file(url).replace('"', ""))
+            args = f'cygstart "{url}"'
+        else:
+            url = url.replace('"', "")
+            wait_str = "-w" if wait else ""
+            args = f'cygstart {wait_str} "{url}"'
+        return os.system(args)
+
+    try:
+        if locate:
+            url = os.path.dirname(_unquote_file(url)) or "."
+        else:
+            url = _unquote_file(url)
+        c = subprocess.Popen(["xdg-open", url])
+        if wait:
+            return c.wait()
+        return 0
+    except OSError:
+        if url.startswith(("http://", "https://")) and not locate and not wait:
+            import webbrowser
+
+            webbrowser.open(url)
+            return 0
+        return 1
+
+
+def _translate_ch_to_exc(ch: str) -> t.Optional[BaseException]:
+    if ch == "\x03":
+        raise KeyboardInterrupt()
+
+    if ch == "\x04" and not WIN:  # Unix-like, Ctrl+D
+        raise EOFError()
+
+    if ch == "\x1a" and WIN:  # Windows, Ctrl+Z
+        raise EOFError()
+
+    return None
+
+
+if WIN:
+    import msvcrt
+
+    @contextlib.contextmanager
+    def raw_terminal() -> t.Iterator[int]:
+        yield -1
+
+    def getchar(echo: bool) -> str:
+        # The function `getch` will return a bytes object corresponding to
+        # the pressed character. Since Windows 10 build 1803, it will also
+        # return \x00 when called a second time after pressing a regular key.
+        #
+        # `getwch` does not share this probably-bugged behavior. Moreover, it
+        # returns a Unicode object by default, which is what we want.
+        #
+        # Either of these functions will return \x00 or \xe0 to indicate
+        # a special key, and you need to call the same function again to get
+        # the "rest" of the code. The fun part is that \u00e0 is
+        # "latin small letter a with grave", so if you type that on a French
+        # keyboard, you _also_ get a \xe0.
+        # E.g., consider the Up arrow. This returns \xe0 and then \x48. The
+        # resulting Unicode string reads as "a with grave" + "capital H".
+        # This is indistinguishable from when the user actually types
+        # "a with grave" and then "capital H".
+        #
+        # When \xe0 is returned, we assume it's part of a special-key sequence
+        # and call `getwch` again, but that means that when the user types
+        # the \u00e0 character, `getchar` doesn't return until a second
+        # character is typed.
+        # The alternative is returning immediately, but that would mess up
+        # cross-platform handling of arrow keys and others that start with
+        # \xe0. Another option is using `getch`, but then we can't reliably
+        # read non-ASCII characters, because return values of `getch` are
+        # limited to the current 8-bit codepage.
+        #
+        # Anyway, Click doesn't claim to do this Right(tm), and using `getwch`
+        # is doing the right thing in more situations than with `getch`.
+        func: t.Callable[[], str]
+
+        if echo:
+            func = msvcrt.getwche  # type: ignore
+        else:
+            func = msvcrt.getwch  # type: ignore
+
+        rv = func()
+
+        if rv in ("\x00", "\xe0"):
+            # \x00 and \xe0 are control characters that indicate special key,
+            # see above.
+            rv += func()
+
+        _translate_ch_to_exc(rv)
+        return rv
+
+else:
+    import tty
+    import termios
+
+    @contextlib.contextmanager
+    def raw_terminal() -> t.Iterator[int]:
+        f: t.Optional[t.TextIO]
+        fd: int
+
+        if not isatty(sys.stdin):
+            f = open("/dev/tty")
+            fd = f.fileno()
+        else:
+            fd = sys.stdin.fileno()
+            f = None
+
+        try:
+            old_settings = termios.tcgetattr(fd)
+
+            try:
+                tty.setraw(fd)
+                yield fd
+            finally:
+                termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
+                sys.stdout.flush()
+
+                if f is not None:
+                    f.close()
+        except termios.error:
+            pass
+
+    def getchar(echo: bool) -> str:
+        with raw_terminal() as fd:
+            ch = os.read(fd, 32).decode(get_best_encoding(sys.stdin), "replace")
+
+            if echo and isatty(sys.stdout):
+                sys.stdout.write(ch)
+
+            _translate_ch_to_exc(ch)
+            return ch

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/google_auth-2.9.0-py3.10-nspkg.pth

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c47e604f1738522a583f7aab6cffb80821cd18157dede051e10aa185e0af065e
+size 539

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/__init__.py

@@ -0,0 +1,2190 @@
+# Copyright 2015-2016 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""gRPC's Python API."""
+
+import abc
+import contextlib
+import enum
+import logging
+import sys
+
+from grpc import _compression
+from grpc._cython import cygrpc as _cygrpc
+from grpc._runtime_protos import protos
+from grpc._runtime_protos import protos_and_services
+from grpc._runtime_protos import services
+import six
+
+logging.getLogger(__name__).addHandler(logging.NullHandler())
+
+try:
+    # pylint: disable=ungrouped-imports
+    from grpc._grpcio_metadata import __version__
+except ImportError:
+    __version__ = "dev0"
+
+############################## Future Interface  ###############################
+
+
+class FutureTimeoutError(Exception):
+    """Indicates that a method call on a Future timed out."""
+
+
+class FutureCancelledError(Exception):
+    """Indicates that the computation underlying a Future was cancelled."""
+
+
+class Future(six.with_metaclass(abc.ABCMeta)):
+    """A representation of a computation in another control flow.
+
+    Computations represented by a Future may be yet to be begun,
+    may be ongoing, or may have already completed.
+    """
+
+    @abc.abstractmethod
+    def cancel(self):
+        """Attempts to cancel the computation.
+
+        This method does not block.
+
+        Returns:
+            bool:
+            Returns True if the computation was canceled.
+
+            Returns False under all other circumstances, for example:
+
+            1. computation has begun and could not be canceled.
+            2. computation has finished
+            3. computation is scheduled for execution and it is impossible
+                to determine its state without blocking.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def cancelled(self):
+        """Describes whether the computation was cancelled.
+
+        This method does not block.
+
+        Returns:
+            bool:
+            Returns True if the computation was cancelled before its result became
+            available.
+
+            Returns False under all other circumstances, for example:
+
+            1. computation was not cancelled.
+            2. computation's result is available.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def running(self):
+        """Describes whether the computation is taking place.
+
+        This method does not block.
+
+        Returns:
+            Returns True if the computation is scheduled for execution or
+            currently executing.
+
+            Returns False if the computation already executed or was cancelled.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def done(self):
+        """Describes whether the computation has taken place.
+
+        This method does not block.
+
+        Returns:
+            bool:
+            Returns True if the computation already executed or was cancelled.
+            Returns False if the computation is scheduled for execution or
+            currently executing.
+            This is exactly opposite of the running() method's result.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def result(self, timeout=None):
+        """Returns the result of the computation or raises its exception.
+
+        This method may return immediately or may block.
+
+        Args:
+          timeout: The length of time in seconds to wait for the computation to
+            finish or be cancelled. If None, the call will block until the
+            computations's termination.
+
+        Returns:
+          The return value of the computation.
+
+        Raises:
+          FutureTimeoutError: If a timeout value is passed and the computation
+            does not terminate within the allotted time.
+          FutureCancelledError: If the computation was cancelled.
+          Exception: If the computation raised an exception, this call will
+            raise the same exception.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def exception(self, timeout=None):
+        """Return the exception raised by the computation.
+
+        This method may return immediately or may block.
+
+        Args:
+          timeout: The length of time in seconds to wait for the computation to
+            terminate or be cancelled. If None, the call will block until the
+            computations's termination.
+
+        Returns:
+            The exception raised by the computation, or None if the computation
+            did not raise an exception.
+
+        Raises:
+          FutureTimeoutError: If a timeout value is passed and the computation
+            does not terminate within the allotted time.
+          FutureCancelledError: If the computation was cancelled.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def traceback(self, timeout=None):
+        """Access the traceback of the exception raised by the computation.
+
+        This method may return immediately or may block.
+
+        Args:
+          timeout: The length of time in seconds to wait for the computation
+            to terminate or be cancelled. If None, the call will block until
+            the computation's termination.
+
+        Returns:
+            The traceback of the exception raised by the computation, or None
+            if the computation did not raise an exception.
+
+        Raises:
+          FutureTimeoutError: If a timeout value is passed and the computation
+            does not terminate within the allotted time.
+          FutureCancelledError: If the computation was cancelled.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def add_done_callback(self, fn):
+        """Adds a function to be called at completion of the computation.
+
+        The callback will be passed this Future object describing the outcome
+        of the computation.  Callbacks will be invoked after the future is
+        terminated, whether successfully or not.
+
+        If the computation has already completed, the callback will be called
+        immediately.
+
+        Exceptions raised in the callback will be logged at ERROR level, but
+        will not terminate any threads of execution.
+
+        Args:
+          fn: A callable taking this Future object as its single parameter.
+        """
+        raise NotImplementedError()
+
+
+################################  gRPC Enums  ##################################
+
+
+@enum.unique
+class ChannelConnectivity(enum.Enum):
+    """Mirrors grpc_connectivity_state in the gRPC Core.
+
+    Attributes:
+      IDLE: The channel is idle.
+      CONNECTING: The channel is connecting.
+      READY: The channel is ready to conduct RPCs.
+      TRANSIENT_FAILURE: The channel has seen a failure from which it expects
+        to recover.
+      SHUTDOWN: The channel has seen a failure from which it cannot recover.
+    """
+    IDLE = (_cygrpc.ConnectivityState.idle, 'idle')
+    CONNECTING = (_cygrpc.ConnectivityState.connecting, 'connecting')
+    READY = (_cygrpc.ConnectivityState.ready, 'ready')
+    TRANSIENT_FAILURE = (_cygrpc.ConnectivityState.transient_failure,
+                         'transient failure')
+    SHUTDOWN = (_cygrpc.ConnectivityState.shutdown, 'shutdown')
+
+
+@enum.unique
+class StatusCode(enum.Enum):
+    """Mirrors grpc_status_code in the gRPC Core.
+
+    Attributes:
+      OK: Not an error; returned on success
+      CANCELLED: The operation was cancelled (typically by the caller).
+      UNKNOWN: Unknown error.
+      INVALID_ARGUMENT: Client specified an invalid argument.
+      DEADLINE_EXCEEDED: Deadline expired before operation could complete.
+      NOT_FOUND: Some requested entity (e.g., file or directory) was not found.
+      ALREADY_EXISTS: Some entity that we attempted to create (e.g., file or directory)
+        already exists.
+      PERMISSION_DENIED: The caller does not have permission to execute the specified
+        operation.
+      UNAUTHENTICATED: The request does not have valid authentication credentials for the
+        operation.
+      RESOURCE_EXHAUSTED: Some resource has been exhausted, perhaps a per-user quota, or
+        perhaps the entire file system is out of space.
+      FAILED_PRECONDITION: Operation was rejected because the system is not in a state
+        required for the operation's execution.
+      ABORTED: The operation was aborted, typically due to a concurrency issue
+        like sequencer check failures, transaction aborts, etc.
+      UNIMPLEMENTED: Operation is not implemented or not supported/enabled in this service.
+      INTERNAL: Internal errors.  Means some invariants expected by underlying
+        system has been broken.
+      UNAVAILABLE: The service is currently unavailable.
+      DATA_LOSS: Unrecoverable data loss or corruption.
+    """
+    OK = (_cygrpc.StatusCode.ok, 'ok')
+    CANCELLED = (_cygrpc.StatusCode.cancelled, 'cancelled')
+    UNKNOWN = (_cygrpc.StatusCode.unknown, 'unknown')
+    INVALID_ARGUMENT = (_cygrpc.StatusCode.invalid_argument, 'invalid argument')
+    DEADLINE_EXCEEDED = (_cygrpc.StatusCode.deadline_exceeded,
+                         'deadline exceeded')
+    NOT_FOUND = (_cygrpc.StatusCode.not_found, 'not found')
+    ALREADY_EXISTS = (_cygrpc.StatusCode.already_exists, 'already exists')
+    PERMISSION_DENIED = (_cygrpc.StatusCode.permission_denied,
+                         'permission denied')
+    RESOURCE_EXHAUSTED = (_cygrpc.StatusCode.resource_exhausted,
+                          'resource exhausted')
+    FAILED_PRECONDITION = (_cygrpc.StatusCode.failed_precondition,
+                           'failed precondition')
+    ABORTED = (_cygrpc.StatusCode.aborted, 'aborted')
+    OUT_OF_RANGE = (_cygrpc.StatusCode.out_of_range, 'out of range')
+    UNIMPLEMENTED = (_cygrpc.StatusCode.unimplemented, 'unimplemented')
+    INTERNAL = (_cygrpc.StatusCode.internal, 'internal')
+    UNAVAILABLE = (_cygrpc.StatusCode.unavailable, 'unavailable')
+    DATA_LOSS = (_cygrpc.StatusCode.data_loss, 'data loss')
+    UNAUTHENTICATED = (_cygrpc.StatusCode.unauthenticated, 'unauthenticated')
+
+
+#############################  gRPC Status  ################################
+
+
+class Status(six.with_metaclass(abc.ABCMeta)):
+    """Describes the status of an RPC.
+
+    This is an EXPERIMENTAL API.
+
+    Attributes:
+      code: A StatusCode object to be sent to the client.
+      details: A UTF-8-encodable string to be sent to the client upon
+        termination of the RPC.
+      trailing_metadata: The trailing :term:`metadata` in the RPC.
+    """
+
+
+#############################  gRPC Exceptions  ################################
+
+
+class RpcError(Exception):
+    """Raised by the gRPC library to indicate non-OK-status RPC termination."""
+
+
+##############################  Shared Context  ################################
+
+
+class RpcContext(six.with_metaclass(abc.ABCMeta)):
+    """Provides RPC-related information and action."""
+
+    @abc.abstractmethod
+    def is_active(self):
+        """Describes whether the RPC is active or has terminated.
+
+        Returns:
+          bool:
+          True if RPC is active, False otherwise.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def time_remaining(self):
+        """Describes the length of allowed time remaining for the RPC.
+
+        Returns:
+          A nonnegative float indicating the length of allowed time in seconds
+          remaining for the RPC to complete before it is considered to have
+          timed out, or None if no deadline was specified for the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def cancel(self):
+        """Cancels the RPC.
+
+        Idempotent and has no effect if the RPC has already terminated.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def add_callback(self, callback):
+        """Registers a callback to be called on RPC termination.
+
+        Args:
+          callback: A no-parameter callable to be called on RPC termination.
+
+        Returns:
+          True if the callback was added and will be called later; False if
+            the callback was not added and will not be called (because the RPC
+            already terminated or some other reason).
+        """
+        raise NotImplementedError()
+
+
+#########################  Invocation-Side Context  ############################
+
+
+class Call(six.with_metaclass(abc.ABCMeta, RpcContext)):
+    """Invocation-side utility object for an RPC."""
+
+    @abc.abstractmethod
+    def initial_metadata(self):
+        """Accesses the initial metadata sent by the server.
+
+        This method blocks until the value is available.
+
+        Returns:
+          The initial :term:`metadata`.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def trailing_metadata(self):
+        """Accesses the trailing metadata sent by the server.
+
+        This method blocks until the value is available.
+
+        Returns:
+          The trailing :term:`metadata`.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def code(self):
+        """Accesses the status code sent by the server.
+
+        This method blocks until the value is available.
+
+        Returns:
+          The StatusCode value for the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def details(self):
+        """Accesses the details sent by the server.
+
+        This method blocks until the value is available.
+
+        Returns:
+          The details string of the RPC.
+        """
+        raise NotImplementedError()
+
+
+##############  Invocation-Side Interceptor Interfaces & Classes  ##############
+
+
+class ClientCallDetails(six.with_metaclass(abc.ABCMeta)):
+    """Describes an RPC to be invoked.
+
+    Attributes:
+      method: The method name of the RPC.
+      timeout: An optional duration of time in seconds to allow for the RPC.
+      metadata: Optional :term:`metadata` to be transmitted to
+        the service-side of the RPC.
+      credentials: An optional CallCredentials for the RPC.
+      wait_for_ready: This is an EXPERIMENTAL argument. An optional
+            flag to enable :term:`wait_for_ready` mechanism.
+      compression: An element of grpc.compression, e.g.
+        grpc.compression.Gzip. This is an EXPERIMENTAL option.
+    """
+
+
+class UnaryUnaryClientInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting unary-unary invocations."""
+
+    @abc.abstractmethod
+    def intercept_unary_unary(self, continuation, client_call_details, request):
+        """Intercepts a unary-unary invocation asynchronously.
+
+        Args:
+          continuation: A function that proceeds with the invocation by
+            executing the next interceptor in chain or invoking the
+            actual RPC on the underlying Channel. It is the interceptor's
+            responsibility to call it if it decides to move the RPC forward.
+            The interceptor can use
+            `response_future = continuation(client_call_details, request)`
+            to continue with the RPC. `continuation` returns an object that is
+            both a Call for the RPC and a Future. In the event of RPC
+            completion, the return Call-Future's result value will be
+            the response message of the RPC. Should the event terminate
+            with non-OK status, the returned Call-Future's exception value
+            will be an RpcError.
+          client_call_details: A ClientCallDetails object describing the
+            outgoing RPC.
+          request: The request value for the RPC.
+
+        Returns:
+            An object that is both a Call for the RPC and a Future.
+            In the event of RPC completion, the return Call-Future's
+            result value will be the response message of the RPC.
+            Should the event terminate with non-OK status, the returned
+            Call-Future's exception value will be an RpcError.
+        """
+        raise NotImplementedError()
+
+
+class UnaryStreamClientInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting unary-stream invocations."""
+
+    @abc.abstractmethod
+    def intercept_unary_stream(self, continuation, client_call_details,
+                               request):
+        """Intercepts a unary-stream invocation.
+
+        Args:
+          continuation: A function that proceeds with the invocation by
+            executing the next interceptor in chain or invoking the
+            actual RPC on the underlying Channel. It is the interceptor's
+            responsibility to call it if it decides to move the RPC forward.
+            The interceptor can use
+            `response_iterator = continuation(client_call_details, request)`
+            to continue with the RPC. `continuation` returns an object that is
+            both a Call for the RPC and an iterator for response values.
+            Drawing response values from the returned Call-iterator may
+            raise RpcError indicating termination of the RPC with non-OK
+            status.
+          client_call_details: A ClientCallDetails object describing the
+            outgoing RPC.
+          request: The request value for the RPC.
+
+        Returns:
+            An object that is both a Call for the RPC and an iterator of
+            response values. Drawing response values from the returned
+            Call-iterator may raise RpcError indicating termination of
+            the RPC with non-OK status. This object *should* also fulfill the
+            Future interface, though it may not.
+        """
+        raise NotImplementedError()
+
+
+class StreamUnaryClientInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting stream-unary invocations."""
+
+    @abc.abstractmethod
+    def intercept_stream_unary(self, continuation, client_call_details,
+                               request_iterator):
+        """Intercepts a stream-unary invocation asynchronously.
+
+        Args:
+          continuation: A function that proceeds with the invocation by
+            executing the next interceptor in chain or invoking the
+            actual RPC on the underlying Channel. It is the interceptor's
+            responsibility to call it if it decides to move the RPC forward.
+            The interceptor can use
+            `response_future = continuation(client_call_details, request_iterator)`
+            to continue with the RPC. `continuation` returns an object that is
+            both a Call for the RPC and a Future. In the event of RPC completion,
+            the return Call-Future's result value will be the response message
+            of the RPC. Should the event terminate with non-OK status, the
+            returned Call-Future's exception value will be an RpcError.
+          client_call_details: A ClientCallDetails object describing the
+            outgoing RPC.
+          request_iterator: An iterator that yields request values for the RPC.
+
+        Returns:
+          An object that is both a Call for the RPC and a Future.
+          In the event of RPC completion, the return Call-Future's
+          result value will be the response message of the RPC.
+          Should the event terminate with non-OK status, the returned
+          Call-Future's exception value will be an RpcError.
+        """
+        raise NotImplementedError()
+
+
+class StreamStreamClientInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting stream-stream invocations."""
+
+    @abc.abstractmethod
+    def intercept_stream_stream(self, continuation, client_call_details,
+                                request_iterator):
+        """Intercepts a stream-stream invocation.
+
+        Args:
+          continuation: A function that proceeds with the invocation by
+            executing the next interceptor in chain or invoking the
+            actual RPC on the underlying Channel. It is the interceptor's
+            responsibility to call it if it decides to move the RPC forward.
+            The interceptor can use
+            `response_iterator = continuation(client_call_details, request_iterator)`
+            to continue with the RPC. `continuation` returns an object that is
+            both a Call for the RPC and an iterator for response values.
+            Drawing response values from the returned Call-iterator may
+            raise RpcError indicating termination of the RPC with non-OK
+            status.
+          client_call_details: A ClientCallDetails object describing the
+            outgoing RPC.
+          request_iterator: An iterator that yields request values for the RPC.
+
+        Returns:
+          An object that is both a Call for the RPC and an iterator of
+          response values. Drawing response values from the returned
+          Call-iterator may raise RpcError indicating termination of
+          the RPC with non-OK status. This object *should* also fulfill the
+          Future interface, though it may not.
+        """
+        raise NotImplementedError()
+
+
+############  Authentication & Authorization Interfaces & Classes  #############
+
+
+class ChannelCredentials(object):
+    """An encapsulation of the data required to create a secure Channel.
+
+    This class has no supported interface - it exists to define the type of its
+    instances and its instances exist to be passed to other functions. For
+    example, ssl_channel_credentials returns an instance of this class and
+    secure_channel requires an instance of this class.
+    """
+
+    def __init__(self, credentials):
+        self._credentials = credentials
+
+
+class CallCredentials(object):
+    """An encapsulation of the data required to assert an identity over a call.
+
+    A CallCredentials has to be used with secure Channel, otherwise the
+    metadata will not be transmitted to the server.
+
+    A CallCredentials may be composed with ChannelCredentials to always assert
+    identity for every call over that Channel.
+
+    This class has no supported interface - it exists to define the type of its
+    instances and its instances exist to be passed to other functions.
+    """
+
+    def __init__(self, credentials):
+        self._credentials = credentials
+
+
+class AuthMetadataContext(six.with_metaclass(abc.ABCMeta)):
+    """Provides information to call credentials metadata plugins.
+
+    Attributes:
+      service_url: A string URL of the service being called into.
+      method_name: A string of the fully qualified method name being called.
+    """
+
+
+class AuthMetadataPluginCallback(six.with_metaclass(abc.ABCMeta)):
+    """Callback object received by a metadata plugin."""
+
+    def __call__(self, metadata, error):
+        """Passes to the gRPC runtime authentication metadata for an RPC.
+
+        Args:
+          metadata: The :term:`metadata` used to construct the CallCredentials.
+          error: An Exception to indicate error or None to indicate success.
+        """
+        raise NotImplementedError()
+
+
+class AuthMetadataPlugin(six.with_metaclass(abc.ABCMeta)):
+    """A specification for custom authentication."""
+
+    def __call__(self, context, callback):
+        """Implements authentication by passing metadata to a callback.
+
+        This method will be invoked asynchronously in a separate thread.
+
+        Args:
+          context: An AuthMetadataContext providing information on the RPC that
+            the plugin is being called to authenticate.
+          callback: An AuthMetadataPluginCallback to be invoked either
+            synchronously or asynchronously.
+        """
+        raise NotImplementedError()
+
+
+class ServerCredentials(object):
+    """An encapsulation of the data required to open a secure port on a Server.
+
+    This class has no supported interface - it exists to define the type of its
+    instances and its instances exist to be passed to other functions.
+    """
+
+    def __init__(self, credentials):
+        self._credentials = credentials
+
+
+class ServerCertificateConfiguration(object):
+    """A certificate configuration for use with an SSL-enabled Server.
+
+    Instances of this class can be returned in the certificate configuration
+    fetching callback.
+
+    This class has no supported interface -- it exists to define the
+    type of its instances and its instances exist to be passed to
+    other functions.
+    """
+
+    def __init__(self, certificate_configuration):
+        self._certificate_configuration = certificate_configuration
+
+
+########################  Multi-Callable Interfaces  ###########################
+
+
+class UnaryUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
+    """Affords invoking a unary-unary RPC from client-side."""
+
+    @abc.abstractmethod
+    def __call__(self,
+                 request,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        """Synchronously invokes the underlying RPC.
+
+        Args:
+          request: The request value for the RPC.
+          timeout: An optional duration of time in seconds to allow
+            for the RPC.
+          metadata: Optional :term:`metadata` to be transmitted to the
+            service-side of the RPC.
+          credentials: An optional CallCredentials for the RPC. Only valid for
+            secure Channel.
+          wait_for_ready: This is an EXPERIMENTAL argument. An optional
+            flag to enable :term:`wait_for_ready` mechanism.
+          compression: An element of grpc.compression, e.g.
+            grpc.compression.Gzip. This is an EXPERIMENTAL option.
+
+        Returns:
+          The response value for the RPC.
+
+        Raises:
+          RpcError: Indicating that the RPC terminated with non-OK status. The
+            raised RpcError will also be a Call for the RPC affording the RPC's
+            metadata, status code, and details.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def with_call(self,
+                  request,
+                  timeout=None,
+                  metadata=None,
+                  credentials=None,
+                  wait_for_ready=None,
+                  compression=None):
+        """Synchronously invokes the underlying RPC.
+
+        Args:
+          request: The request value for the RPC.
+          timeout: An optional durating of time in seconds to allow for
+            the RPC.
+          metadata: Optional :term:`metadata` to be transmitted to the
+            service-side of the RPC.
+          credentials: An optional CallCredentials for the RPC. Only valid for
+            secure Channel.
+          wait_for_ready: This is an EXPERIMENTAL argument. An optional
+            flag to enable :term:`wait_for_ready` mechanism.
+          compression: An element of grpc.compression, e.g.
+            grpc.compression.Gzip. This is an EXPERIMENTAL option.
+
+        Returns:
+          The response value for the RPC and a Call value for the RPC.
+
+        Raises:
+          RpcError: Indicating that the RPC terminated with non-OK status. The
+            raised RpcError will also be a Call for the RPC affording the RPC's
+            metadata, status code, and details.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def future(self,
+               request,
+               timeout=None,
+               metadata=None,
+               credentials=None,
+               wait_for_ready=None,
+               compression=None):
+        """Asynchronously invokes the underlying RPC.
+
+        Args:
+          request: The request value for the RPC.
+          timeout: An optional duration of time in seconds to allow for
+            the RPC.
+          metadata: Optional :term:`metadata` to be transmitted to the
+            service-side of the RPC.
+          credentials: An optional CallCredentials for the RPC. Only valid for
+            secure Channel.
+          wait_for_ready: This is an EXPERIMENTAL argument. An optional
+            flag to enable :term:`wait_for_ready` mechanism.
+          compression: An element of grpc.compression, e.g.
+            grpc.compression.Gzip. This is an EXPERIMENTAL option.
+
+        Returns:
+            An object that is both a Call for the RPC and a Future.
+            In the event of RPC completion, the return Call-Future's result
+            value will be the response message of the RPC.
+            Should the event terminate with non-OK status,
+            the returned Call-Future's exception value will be an RpcError.
+        """
+        raise NotImplementedError()
+
+
+class UnaryStreamMultiCallable(six.with_metaclass(abc.ABCMeta)):
+    """Affords invoking a unary-stream RPC from client-side."""
+
+    @abc.abstractmethod
+    def __call__(self,
+                 request,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        """Invokes the underlying RPC.
+
+        Args:
+          request: The request value for the RPC.
+          timeout: An optional duration of time in seconds to allow for
+            the RPC. If None, the timeout is considered infinite.
+          metadata: An optional :term:`metadata` to be transmitted to the
+            service-side of the RPC.
+          credentials: An optional CallCredentials for the RPC. Only valid for
+            secure Channel.
+          wait_for_ready: This is an EXPERIMENTAL argument. An optional
+            flag to enable :term:`wait_for_ready` mechanism.
+          compression: An element of grpc.compression, e.g.
+            grpc.compression.Gzip. This is an EXPERIMENTAL option.
+
+        Returns:
+            An object that is a Call for the RPC, an iterator of response
+            values, and a Future for the RPC. Drawing response values from the
+            returned Call-iterator may raise RpcError indicating termination of
+            the RPC with non-OK status.
+        """
+        raise NotImplementedError()
+
+
+class StreamUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
+    """Affords invoking a stream-unary RPC from client-side."""
+
+    @abc.abstractmethod
+    def __call__(self,
+                 request_iterator,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        """Synchronously invokes the underlying RPC.
+
+        Args:
+          request_iterator: An iterator that yields request values for
+            the RPC.
+          timeout: An optional duration of time in seconds to allow for
+            the RPC. If None, the timeout is considered infinite.
+          metadata: Optional :term:`metadata` to be transmitted to the
+            service-side of the RPC.
+          credentials: An optional CallCredentials for the RPC. Only valid for
+            secure Channel.
+          wait_for_ready: This is an EXPERIMENTAL argument. An optional
+            flag to enable :term:`wait_for_ready` mechanism.
+          compression: An element of grpc.compression, e.g.
+            grpc.compression.Gzip. This is an EXPERIMENTAL option.
+
+        Returns:
+          The response value for the RPC.
+
+        Raises:
+          RpcError: Indicating that the RPC terminated with non-OK status. The
+            raised RpcError will also implement grpc.Call, affording methods
+            such as metadata, code, and details.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def with_call(self,
+                  request_iterator,
+                  timeout=None,
+                  metadata=None,
+                  credentials=None,
+                  wait_for_ready=None,
+                  compression=None):
+        """Synchronously invokes the underlying RPC on the client.
+
+        Args:
+          request_iterator: An iterator that yields request values for
+            the RPC.
+          timeout: An optional duration of time in seconds to allow for
+            the RPC. If None, the timeout is considered infinite.
+          metadata: Optional :term:`metadata` to be transmitted to the
+            service-side of the RPC.
+          credentials: An optional CallCredentials for the RPC. Only valid for
+            secure Channel.
+          wait_for_ready: This is an EXPERIMENTAL argument. An optional
+            flag to enable :term:`wait_for_ready` mechanism.
+          compression: An element of grpc.compression, e.g.
+            grpc.compression.Gzip. This is an EXPERIMENTAL option.
+
+        Returns:
+          The response value for the RPC and a Call object for the RPC.
+
+        Raises:
+          RpcError: Indicating that the RPC terminated with non-OK status. The
+            raised RpcError will also be a Call for the RPC affording the RPC's
+            metadata, status code, and details.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def future(self,
+               request_iterator,
+               timeout=None,
+               metadata=None,
+               credentials=None,
+               wait_for_ready=None,
+               compression=None):
+        """Asynchronously invokes the underlying RPC on the client.
+
+        Args:
+          request_iterator: An iterator that yields request values for the RPC.
+          timeout: An optional duration of time in seconds to allow for
+            the RPC. If None, the timeout is considered infinite.
+          metadata: Optional :term:`metadata` to be transmitted to the
+            service-side of the RPC.
+          credentials: An optional CallCredentials for the RPC. Only valid for
+            secure Channel.
+          wait_for_ready: This is an EXPERIMENTAL argument. An optional
+            flag to enable :term:`wait_for_ready` mechanism.
+          compression: An element of grpc.compression, e.g.
+            grpc.compression.Gzip. This is an EXPERIMENTAL option.
+
+        Returns:
+            An object that is both a Call for the RPC and a Future.
+            In the event of RPC completion, the return Call-Future's result value
+            will be the response message of the RPC. Should the event terminate
+            with non-OK status, the returned Call-Future's exception value will
+            be an RpcError.
+        """
+        raise NotImplementedError()
+
+
+class StreamStreamMultiCallable(six.with_metaclass(abc.ABCMeta)):
+    """Affords invoking a stream-stream RPC on client-side."""
+
+    @abc.abstractmethod
+    def __call__(self,
+                 request_iterator,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        """Invokes the underlying RPC on the client.
+
+        Args:
+          request_iterator: An iterator that yields request values for the RPC.
+          timeout: An optional duration of time in seconds to allow for
+            the RPC. If not specified, the timeout is considered infinite.
+          metadata: Optional :term:`metadata` to be transmitted to the
+            service-side of the RPC.
+          credentials: An optional CallCredentials for the RPC. Only valid for
+            secure Channel.
+          wait_for_ready: This is an EXPERIMENTAL argument. An optional
+            flag to enable :term:`wait_for_ready` mechanism.
+          compression: An element of grpc.compression, e.g.
+            grpc.compression.Gzip. This is an EXPERIMENTAL option.
+
+        Returns:
+            An object that is a Call for the RPC, an iterator of response
+            values, and a Future for the RPC. Drawing response values from the
+            returned Call-iterator may raise RpcError indicating termination of
+            the RPC with non-OK status.
+        """
+        raise NotImplementedError()
+
+
+#############################  Channel Interface  ##############################
+
+
+class Channel(six.with_metaclass(abc.ABCMeta)):
+    """Affords RPC invocation via generic methods on client-side.
+
+    Channel objects implement the Context Manager type, although they need not
+    support being entered and exited multiple times.
+    """
+
+    @abc.abstractmethod
+    def subscribe(self, callback, try_to_connect=False):
+        """Subscribe to this Channel's connectivity state machine.
+
+        A Channel may be in any of the states described by ChannelConnectivity.
+        This method allows application to monitor the state transitions.
+        The typical use case is to debug or gain better visibility into gRPC
+        runtime's state.
+
+        Args:
+          callback: A callable to be invoked with ChannelConnectivity argument.
+            ChannelConnectivity describes current state of the channel.
+            The callable will be invoked immediately upon subscription
+            and again for every change to ChannelConnectivity until it
+            is unsubscribed or this Channel object goes out of scope.
+          try_to_connect: A boolean indicating whether or not this Channel
+            should attempt to connect immediately. If set to False, gRPC
+            runtime decides when to connect.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def unsubscribe(self, callback):
+        """Unsubscribes a subscribed callback from this Channel's connectivity.
+
+        Args:
+          callback: A callable previously registered with this Channel from
+          having been passed to its "subscribe" method.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def unary_unary(self,
+                    method,
+                    request_serializer=None,
+                    response_deserializer=None):
+        """Creates a UnaryUnaryMultiCallable for a unary-unary method.
+
+        Args:
+          method: The name of the RPC method.
+          request_serializer: Optional :term:`serializer` for serializing the request
+            message. Request goes unserialized in case None is passed.
+          response_deserializer: Optional :term:`deserializer` for deserializing the
+            response message. Response goes undeserialized in case None
+            is passed.
+
+        Returns:
+          A UnaryUnaryMultiCallable value for the named unary-unary method.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def unary_stream(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
+        """Creates a UnaryStreamMultiCallable for a unary-stream method.
+
+        Args:
+          method: The name of the RPC method.
+          request_serializer: Optional :term:`serializer` for serializing the request
+            message. Request goes unserialized in case None is passed.
+          response_deserializer: Optional :term:`deserializer` for deserializing the
+            response message. Response goes undeserialized in case None is
+            passed.
+
+        Returns:
+          A UnaryStreamMultiCallable value for the name unary-stream method.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def stream_unary(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
+        """Creates a StreamUnaryMultiCallable for a stream-unary method.
+
+        Args:
+          method: The name of the RPC method.
+          request_serializer: Optional :term:`serializer` for serializing the request
+            message. Request goes unserialized in case None is passed.
+          response_deserializer: Optional :term:`deserializer` for deserializing the
+            response message. Response goes undeserialized in case None is
+            passed.
+
+        Returns:
+          A StreamUnaryMultiCallable value for the named stream-unary method.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def stream_stream(self,
+                      method,
+                      request_serializer=None,
+                      response_deserializer=None):
+        """Creates a StreamStreamMultiCallable for a stream-stream method.
+
+        Args:
+          method: The name of the RPC method.
+          request_serializer: Optional :term:`serializer` for serializing the request
+            message. Request goes unserialized in case None is passed.
+          response_deserializer: Optional :term:`deserializer` for deserializing the
+            response message. Response goes undeserialized in case None
+            is passed.
+
+        Returns:
+          A StreamStreamMultiCallable value for the named stream-stream method.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def close(self):
+        """Closes this Channel and releases all resources held by it.
+
+        Closing the Channel will immediately terminate all RPCs active with the
+        Channel and it is not valid to invoke new RPCs with the Channel.
+
+        This method is idempotent.
+        """
+        raise NotImplementedError()
+
+    def __enter__(self):
+        """Enters the runtime context related to the channel object."""
+        raise NotImplementedError()
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        """Exits the runtime context related to the channel object."""
+        raise NotImplementedError()
+
+
+##########################  Service-Side Context  ##############################
+
+
+class ServicerContext(six.with_metaclass(abc.ABCMeta, RpcContext)):
+    """A context object passed to method implementations."""
+
+    @abc.abstractmethod
+    def invocation_metadata(self):
+        """Accesses the metadata from the sent by the client.
+
+        Returns:
+          The invocation :term:`metadata`.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def peer(self):
+        """Identifies the peer that invoked the RPC being serviced.
+
+        Returns:
+          A string identifying the peer that invoked the RPC being serviced.
+          The string format is determined by gRPC runtime.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def peer_identities(self):
+        """Gets one or more peer identity(s).
+
+        Equivalent to
+        servicer_context.auth_context().get(servicer_context.peer_identity_key())
+
+        Returns:
+          An iterable of the identities, or None if the call is not
+          authenticated. Each identity is returned as a raw bytes type.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def peer_identity_key(self):
+        """The auth property used to identify the peer.
+
+        For example, "x509_common_name" or "x509_subject_alternative_name" are
+        used to identify an SSL peer.
+
+        Returns:
+          The auth property (string) that indicates the
+          peer identity, or None if the call is not authenticated.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def auth_context(self):
+        """Gets the auth context for the call.
+
+        Returns:
+          A map of strings to an iterable of bytes for each auth property.
+        """
+        raise NotImplementedError()
+
+    def set_compression(self, compression):
+        """Set the compression algorithm to be used for the entire call.
+
+        This is an EXPERIMENTAL method.
+
+        Args:
+          compression: An element of grpc.compression, e.g.
+            grpc.compression.Gzip.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def send_initial_metadata(self, initial_metadata):
+        """Sends the initial metadata value to the client.
+
+        This method need not be called by implementations if they have no
+        metadata to add to what the gRPC runtime will transmit.
+
+        Args:
+          initial_metadata: The initial :term:`metadata`.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def set_trailing_metadata(self, trailing_metadata):
+        """Sets the trailing metadata for the RPC.
+
+        Sets the trailing metadata to be sent upon completion of the RPC.
+
+        If this method is invoked multiple times throughout the lifetime of an
+        RPC, the value supplied in the final invocation will be the value sent
+        over the wire.
+
+        This method need not be called by implementations if they have no
+        metadata to add to what the gRPC runtime will transmit.
+
+        Args:
+          trailing_metadata: The trailing :term:`metadata`.
+        """
+        raise NotImplementedError()
+
+    def trailing_metadata(self):
+        """Access value to be used as trailing metadata upon RPC completion.
+
+        This is an EXPERIMENTAL API.
+
+        Returns:
+          The trailing :term:`metadata` for the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def abort(self, code, details):
+        """Raises an exception to terminate the RPC with a non-OK status.
+
+        The code and details passed as arguments will supercede any existing
+        ones.
+
+        Args:
+          code: A StatusCode object to be sent to the client.
+            It must not be StatusCode.OK.
+          details: A UTF-8-encodable string to be sent to the client upon
+            termination of the RPC.
+
+        Raises:
+          Exception: An exception is always raised to signal the abortion the
+            RPC to the gRPC runtime.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def abort_with_status(self, status):
+        """Raises an exception to terminate the RPC with a non-OK status.
+
+        The status passed as argument will supercede any existing status code,
+        status message and trailing metadata.
+
+        This is an EXPERIMENTAL API.
+
+        Args:
+          status: A grpc.Status object. The status code in it must not be
+            StatusCode.OK.
+
+        Raises:
+          Exception: An exception is always raised to signal the abortion the
+            RPC to the gRPC runtime.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def set_code(self, code):
+        """Sets the value to be used as status code upon RPC completion.
+
+        This method need not be called by method implementations if they wish
+        the gRPC runtime to determine the status code of the RPC.
+
+        Args:
+          code: A StatusCode object to be sent to the client.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def set_details(self, details):
+        """Sets the value to be used as detail string upon RPC completion.
+
+        This method need not be called by method implementations if they have
+        no details to transmit.
+
+        Args:
+          details: A UTF-8-encodable string to be sent to the client upon
+            termination of the RPC.
+        """
+        raise NotImplementedError()
+
+    def code(self):
+        """Accesses the value to be used as status code upon RPC completion.
+
+        This is an EXPERIMENTAL API.
+
+        Returns:
+          The StatusCode value for the RPC.
+        """
+        raise NotImplementedError()
+
+    def details(self):
+        """Accesses the value to be used as detail string upon RPC completion.
+
+        This is an EXPERIMENTAL API.
+
+        Returns:
+          The details string of the RPC.
+        """
+        raise NotImplementedError()
+
+    def disable_next_message_compression(self):
+        """Disables compression for the next response message.
+
+        This is an EXPERIMENTAL method.
+
+        This method will override any compression configuration set during
+        server creation or set on the call.
+        """
+        raise NotImplementedError()
+
+
+#####################  Service-Side Handler Interfaces  ########################
+
+
+class RpcMethodHandler(six.with_metaclass(abc.ABCMeta)):
+    """An implementation of a single RPC method.
+
+    Attributes:
+      request_streaming: Whether the RPC supports exactly one request message
+        or any arbitrary number of request messages.
+      response_streaming: Whether the RPC supports exactly one response message
+        or any arbitrary number of response messages.
+      request_deserializer: A callable :term:`deserializer` that accepts a byte string and
+        returns an object suitable to be passed to this object's business
+        logic, or None to indicate that this object's business logic should be
+        passed the raw request bytes.
+      response_serializer: A callable :term:`serializer` that accepts an object produced
+        by this object's business logic and returns a byte string, or None to
+        indicate that the byte strings produced by this object's business logic
+        should be transmitted on the wire as they are.
+      unary_unary: This object's application-specific business logic as a
+        callable value that takes a request value and a ServicerContext object
+        and returns a response value. Only non-None if both request_streaming
+        and response_streaming are False.
+      unary_stream: This object's application-specific business logic as a
+        callable value that takes a request value and a ServicerContext object
+        and returns an iterator of response values. Only non-None if
+        request_streaming is False and response_streaming is True.
+      stream_unary: This object's application-specific business logic as a
+        callable value that takes an iterator of request values and a
+        ServicerContext object and returns a response value. Only non-None if
+        request_streaming is True and response_streaming is False.
+      stream_stream: This object's application-specific business logic as a
+        callable value that takes an iterator of request values and a
+        ServicerContext object and returns an iterator of response values.
+        Only non-None if request_streaming and response_streaming are both
+        True.
+    """
+
+
+class HandlerCallDetails(six.with_metaclass(abc.ABCMeta)):
+    """Describes an RPC that has just arrived for service.
+
+    Attributes:
+      method: The method name of the RPC.
+      invocation_metadata: The :term:`metadata` sent by the client.
+    """
+
+
+class GenericRpcHandler(six.with_metaclass(abc.ABCMeta)):
+    """An implementation of arbitrarily many RPC methods."""
+
+    @abc.abstractmethod
+    def service(self, handler_call_details):
+        """Returns the handler for servicing the RPC.
+
+        Args:
+          handler_call_details: A HandlerCallDetails describing the RPC.
+
+        Returns:
+          An RpcMethodHandler with which the RPC may be serviced if the
+          implementation chooses to service this RPC, or None otherwise.
+        """
+        raise NotImplementedError()
+
+
+class ServiceRpcHandler(six.with_metaclass(abc.ABCMeta, GenericRpcHandler)):
+    """An implementation of RPC methods belonging to a service.
+
+    A service handles RPC methods with structured names of the form
+    '/Service.Name/Service.Method', where 'Service.Name' is the value
+    returned by service_name(), and 'Service.Method' is the method
+    name.  A service can have multiple method names, but only a single
+    service name.
+    """
+
+    @abc.abstractmethod
+    def service_name(self):
+        """Returns this service's name.
+
+        Returns:
+          The service name.
+        """
+        raise NotImplementedError()
+
+
+####################  Service-Side Interceptor Interfaces  #####################
+
+
+class ServerInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting incoming RPCs on the service-side."""
+
+    @abc.abstractmethod
+    def intercept_service(self, continuation, handler_call_details):
+        """Intercepts incoming RPCs before handing them over to a handler.
+
+        Args:
+          continuation: A function that takes a HandlerCallDetails and
+            proceeds to invoke the next interceptor in the chain, if any,
+            or the RPC handler lookup logic, with the call details passed
+            as an argument, and returns an RpcMethodHandler instance if
+            the RPC is considered serviced, or None otherwise.
+          handler_call_details: A HandlerCallDetails describing the RPC.
+
+        Returns:
+          An RpcMethodHandler with which the RPC may be serviced if the
+          interceptor chooses to service this RPC, or None otherwise.
+        """
+        raise NotImplementedError()
+
+
+#############################  Server Interface  ###############################
+
+
+class Server(six.with_metaclass(abc.ABCMeta)):
+    """Services RPCs."""
+
+    @abc.abstractmethod
+    def add_generic_rpc_handlers(self, generic_rpc_handlers):
+        """Registers GenericRpcHandlers with this Server.
+
+        This method is only safe to call before the server is started.
+
+        Args:
+          generic_rpc_handlers: An iterable of GenericRpcHandlers that will be
+          used to service RPCs.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def add_insecure_port(self, address):
+        """Opens an insecure port for accepting RPCs.
+
+        This method may only be called before starting the server.
+
+        Args:
+          address: The address for which to open a port. If the port is 0,
+            or not specified in the address, then gRPC runtime will choose a port.
+
+        Returns:
+          An integer port on which server will accept RPC requests.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def add_secure_port(self, address, server_credentials):
+        """Opens a secure port for accepting RPCs.
+
+        This method may only be called before starting the server.
+
+        Args:
+          address: The address for which to open a port.
+            if the port is 0, or not specified in the address, then gRPC
+            runtime will choose a port.
+          server_credentials: A ServerCredentials object.
+
+        Returns:
+          An integer port on which server will accept RPC requests.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def start(self):
+        """Starts this Server.
+
+        This method may only be called once. (i.e. it is not idempotent).
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def stop(self, grace):
+        """Stops this Server.
+
+        This method immediately stop service of new RPCs in all cases.
+
+        If a grace period is specified, this method returns immediately
+        and all RPCs active at the end of the grace period are aborted.
+        If a grace period is not specified (by passing None for `grace`),
+        all existing RPCs are aborted immediately and this method
+        blocks until the last RPC handler terminates.
+
+        This method is idempotent and may be called at any time.
+        Passing a smaller grace value in a subsequent call will have
+        the effect of stopping the Server sooner (passing None will
+        have the effect of stopping the server immediately). Passing
+        a larger grace value in a subsequent call *will not* have the
+        effect of stopping the server later (i.e. the most restrictive
+        grace value is used).
+
+        Args:
+          grace: A duration of time in seconds or None.
+
+        Returns:
+          A threading.Event that will be set when this Server has completely
+          stopped, i.e. when running RPCs either complete or are aborted and
+          all handlers have terminated.
+        """
+        raise NotImplementedError()
+
+    def wait_for_termination(self, timeout=None):
+        """Block current thread until the server stops.
+
+        This is an EXPERIMENTAL API.
+
+        The wait will not consume computational resources during blocking, and
+        it will block until one of the two following conditions are met:
+
+        1) The server is stopped or terminated;
+        2) A timeout occurs if timeout is not `None`.
+
+        The timeout argument works in the same way as `threading.Event.wait()`.
+        https://docs.python.org/3/library/threading.html#threading.Event.wait
+
+        Args:
+          timeout: A floating point number specifying a timeout for the
+            operation in seconds.
+
+        Returns:
+          A bool indicates if the operation times out.
+        """
+        raise NotImplementedError()
+
+
+#################################  Functions    ################################
+
+
+def unary_unary_rpc_method_handler(behavior,
+                                   request_deserializer=None,
+                                   response_serializer=None):
+    """Creates an RpcMethodHandler for a unary-unary RPC method.
+
+    Args:
+      behavior: The implementation of an RPC that accepts one request
+        and returns one response.
+      request_deserializer: An optional :term:`deserializer` for request deserialization.
+      response_serializer: An optional :term:`serializer` for response serialization.
+
+    Returns:
+      An RpcMethodHandler object that is typically used by grpc.Server.
+    """
+    from grpc import _utilities  # pylint: disable=cyclic-import
+    return _utilities.RpcMethodHandler(False, False, request_deserializer,
+                                       response_serializer, behavior, None,
+                                       None, None)
+
+
+def unary_stream_rpc_method_handler(behavior,
+                                    request_deserializer=None,
+                                    response_serializer=None):
+    """Creates an RpcMethodHandler for a unary-stream RPC method.
+
+    Args:
+      behavior: The implementation of an RPC that accepts one request
+        and returns an iterator of response values.
+      request_deserializer: An optional :term:`deserializer` for request deserialization.
+      response_serializer: An optional :term:`serializer` for response serialization.
+
+    Returns:
+      An RpcMethodHandler object that is typically used by grpc.Server.
+    """
+    from grpc import _utilities  # pylint: disable=cyclic-import
+    return _utilities.RpcMethodHandler(False, True, request_deserializer,
+                                       response_serializer, None, behavior,
+                                       None, None)
+
+
+def stream_unary_rpc_method_handler(behavior,
+                                    request_deserializer=None,
+                                    response_serializer=None):
+    """Creates an RpcMethodHandler for a stream-unary RPC method.
+
+    Args:
+      behavior: The implementation of an RPC that accepts an iterator of
+        request values and returns a single response value.
+      request_deserializer: An optional :term:`deserializer` for request deserialization.
+      response_serializer: An optional :term:`serializer` for response serialization.
+
+    Returns:
+      An RpcMethodHandler object that is typically used by grpc.Server.
+    """
+    from grpc import _utilities  # pylint: disable=cyclic-import
+    return _utilities.RpcMethodHandler(True, False, request_deserializer,
+                                       response_serializer, None, None,
+                                       behavior, None)
+
+
+def stream_stream_rpc_method_handler(behavior,
+                                     request_deserializer=None,
+                                     response_serializer=None):
+    """Creates an RpcMethodHandler for a stream-stream RPC method.
+
+    Args:
+      behavior: The implementation of an RPC that accepts an iterator of
+        request values and returns an iterator of response values.
+      request_deserializer: An optional :term:`deserializer` for request deserialization.
+      response_serializer: An optional :term:`serializer` for response serialization.
+
+    Returns:
+      An RpcMethodHandler object that is typically used by grpc.Server.
+    """
+    from grpc import _utilities  # pylint: disable=cyclic-import
+    return _utilities.RpcMethodHandler(True, True, request_deserializer,
+                                       response_serializer, None, None, None,
+                                       behavior)
+
+
+def method_handlers_generic_handler(service, method_handlers):
+    """Creates a GenericRpcHandler from RpcMethodHandlers.
+
+    Args:
+      service: The name of the service that is implemented by the
+        method_handlers.
+      method_handlers: A dictionary that maps method names to corresponding
+        RpcMethodHandler.
+
+    Returns:
+      A GenericRpcHandler. This is typically added to the grpc.Server object
+      with add_generic_rpc_handlers() before starting the server.
+    """
+    from grpc import _utilities  # pylint: disable=cyclic-import
+    return _utilities.DictionaryGenericHandler(service, method_handlers)
+
+
+def ssl_channel_credentials(root_certificates=None,
+                            private_key=None,
+                            certificate_chain=None):
+    """Creates a ChannelCredentials for use with an SSL-enabled Channel.
+
+    Args:
+      root_certificates: The PEM-encoded root certificates as a byte string,
+        or None to retrieve them from a default location chosen by gRPC
+        runtime.
+      private_key: The PEM-encoded private key as a byte string, or None if no
+        private key should be used.
+      certificate_chain: The PEM-encoded certificate chain as a byte string
+        to use or None if no certificate chain should be used.
+
+    Returns:
+      A ChannelCredentials for use with an SSL-enabled Channel.
+    """
+    return ChannelCredentials(
+        _cygrpc.SSLChannelCredentials(root_certificates, private_key,
+                                      certificate_chain))
+
+
+def xds_channel_credentials(fallback_credentials=None):
+    """Creates a ChannelCredentials for use with xDS. This is an EXPERIMENTAL
+      API.
+
+    Args:
+      fallback_credentials: Credentials to use in case it is not possible to
+        establish a secure connection via xDS. If no fallback_credentials
+        argument is supplied, a default SSLChannelCredentials is used.
+    """
+    fallback_credentials = ssl_channel_credentials(
+    ) if fallback_credentials is None else fallback_credentials
+    return ChannelCredentials(
+        _cygrpc.XDSChannelCredentials(fallback_credentials._credentials))
+
+
+def metadata_call_credentials(metadata_plugin, name=None):
+    """Construct CallCredentials from an AuthMetadataPlugin.
+
+    Args:
+      metadata_plugin: An AuthMetadataPlugin to use for authentication.
+      name: An optional name for the plugin.
+
+    Returns:
+      A CallCredentials.
+    """
+    from grpc import _plugin_wrapping  # pylint: disable=cyclic-import
+    return _plugin_wrapping.metadata_plugin_call_credentials(
+        metadata_plugin, name)
+
+
+def access_token_call_credentials(access_token):
+    """Construct CallCredentials from an access token.
+
+    Args:
+      access_token: A string to place directly in the http request
+        authorization header, for example
+        "authorization: Bearer <access_token>".
+
+    Returns:
+      A CallCredentials.
+    """
+    from grpc import _auth  # pylint: disable=cyclic-import
+    from grpc import _plugin_wrapping  # pylint: disable=cyclic-import
+    return _plugin_wrapping.metadata_plugin_call_credentials(
+        _auth.AccessTokenAuthMetadataPlugin(access_token), None)
+
+
+def composite_call_credentials(*call_credentials):
+    """Compose multiple CallCredentials to make a new CallCredentials.
+
+    Args:
+      *call_credentials: At least two CallCredentials objects.
+
+    Returns:
+      A CallCredentials object composed of the given CallCredentials objects.
+    """
+    return CallCredentials(
+        _cygrpc.CompositeCallCredentials(
+            tuple(single_call_credentials._credentials
+                  for single_call_credentials in call_credentials)))
+
+
+def composite_channel_credentials(channel_credentials, *call_credentials):
+    """Compose a ChannelCredentials and one or more CallCredentials objects.
+
+    Args:
+      channel_credentials: A ChannelCredentials object.
+      *call_credentials: One or more CallCredentials objects.
+
+    Returns:
+      A ChannelCredentials composed of the given ChannelCredentials and
+        CallCredentials objects.
+    """
+    return ChannelCredentials(
+        _cygrpc.CompositeChannelCredentials(
+            tuple(single_call_credentials._credentials
+                  for single_call_credentials in call_credentials),
+            channel_credentials._credentials))
+
+
+def ssl_server_credentials(private_key_certificate_chain_pairs,
+                           root_certificates=None,
+                           require_client_auth=False):
+    """Creates a ServerCredentials for use with an SSL-enabled Server.
+
+    Args:
+      private_key_certificate_chain_pairs: A list of pairs of the form
+        [PEM-encoded private key, PEM-encoded certificate chain].
+      root_certificates: An optional byte string of PEM-encoded client root
+        certificates that the server will use to verify client authentication.
+        If omitted, require_client_auth must also be False.
+      require_client_auth: A boolean indicating whether or not to require
+        clients to be authenticated. May only be True if root_certificates
+        is not None.
+
+    Returns:
+      A ServerCredentials for use with an SSL-enabled Server. Typically, this
+      object is an argument to add_secure_port() method during server setup.
+    """
+    if not private_key_certificate_chain_pairs:
+        raise ValueError(
+            'At least one private key-certificate chain pair is required!')
+    elif require_client_auth and root_certificates is None:
+        raise ValueError(
+            'Illegal to require client auth without providing root certificates!'
+        )
+    else:
+        return ServerCredentials(
+            _cygrpc.server_credentials_ssl(root_certificates, [
+                _cygrpc.SslPemKeyCertPair(key, pem)
+                for key, pem in private_key_certificate_chain_pairs
+            ], require_client_auth))
+
+
+def xds_server_credentials(fallback_credentials):
+    """Creates a ServerCredentials for use with xDS. This is an EXPERIMENTAL
+      API.
+
+    Args:
+      fallback_credentials: Credentials to use in case it is not possible to
+        establish a secure connection via xDS. No default value is provided.
+    """
+    return ServerCredentials(
+        _cygrpc.xds_server_credentials(fallback_credentials._credentials))
+
+
+def insecure_server_credentials():
+    """Creates a credentials object directing the server to use no credentials.
+      This is an EXPERIMENTAL API.
+
+    This object cannot be used directly in a call to `add_secure_port`.
+    Instead, it should be used to construct other credentials objects, e.g.
+    with xds_server_credentials.
+    """
+    return ServerCredentials(_cygrpc.insecure_server_credentials())
+
+
+def ssl_server_certificate_configuration(private_key_certificate_chain_pairs,
+                                         root_certificates=None):
+    """Creates a ServerCertificateConfiguration for use with a Server.
+
+    Args:
+      private_key_certificate_chain_pairs: A collection of pairs of
+        the form [PEM-encoded private key, PEM-encoded certificate
+        chain].
+      root_certificates: An optional byte string of PEM-encoded client root
+        certificates that the server will use to verify client authentication.
+
+    Returns:
+      A ServerCertificateConfiguration that can be returned in the certificate
+        configuration fetching callback.
+    """
+    if private_key_certificate_chain_pairs:
+        return ServerCertificateConfiguration(
+            _cygrpc.server_certificate_config_ssl(root_certificates, [
+                _cygrpc.SslPemKeyCertPair(key, pem)
+                for key, pem in private_key_certificate_chain_pairs
+            ]))
+    else:
+        raise ValueError(
+            'At least one private key-certificate chain pair is required!')
+
+
+def dynamic_ssl_server_credentials(initial_certificate_configuration,
+                                   certificate_configuration_fetcher,
+                                   require_client_authentication=False):
+    """Creates a ServerCredentials for use with an SSL-enabled Server.
+
+    Args:
+      initial_certificate_configuration (ServerCertificateConfiguration): The
+        certificate configuration with which the server will be initialized.
+      certificate_configuration_fetcher (callable): A callable that takes no
+        arguments and should return a ServerCertificateConfiguration to
+        replace the server's current certificate, or None for no change
+        (i.e., the server will continue its current certificate
+        config). The library will call this callback on *every* new
+        client connection before starting the TLS handshake with the
+        client, thus allowing the user application to optionally
+        return a new ServerCertificateConfiguration that the server will then
+        use for the handshake.
+      require_client_authentication: A boolean indicating whether or not to
+        require clients to be authenticated.
+
+    Returns:
+      A ServerCredentials.
+    """
+    return ServerCredentials(
+        _cygrpc.server_credentials_ssl_dynamic_cert_config(
+            initial_certificate_configuration,
+            certificate_configuration_fetcher, require_client_authentication))
+
+
+@enum.unique
+class LocalConnectionType(enum.Enum):
+    """Types of local connection for local credential creation.
+
+    Attributes:
+      UDS: Unix domain socket connections
+      LOCAL_TCP: Local TCP connections.
+    """
+    UDS = _cygrpc.LocalConnectionType.uds
+    LOCAL_TCP = _cygrpc.LocalConnectionType.local_tcp
+
+
+def local_channel_credentials(local_connect_type=LocalConnectionType.LOCAL_TCP):
+    """Creates a local ChannelCredentials used for local connections.
+
+    This is an EXPERIMENTAL API.
+
+    Local credentials are used by local TCP endpoints (e.g. localhost:10000)
+    also UDS connections.
+
+    The connections created by local channel credentials are not
+    encrypted, but will be checked if they are local or not.
+    The UDS connections are considered secure by providing peer authentication
+    and data confidentiality while TCP connections are considered insecure.
+
+    It is allowed to transmit call credentials over connections created by
+    local channel credentials.
+
+    Local channel credentials are useful for 1) eliminating insecure_channel usage;
+    2) enable unit testing for call credentials without setting up secrets.
+
+    Args:
+      local_connect_type: Local connection type (either
+        grpc.LocalConnectionType.UDS or grpc.LocalConnectionType.LOCAL_TCP)
+
+    Returns:
+      A ChannelCredentials for use with a local Channel
+    """
+    return ChannelCredentials(
+        _cygrpc.channel_credentials_local(local_connect_type.value))
+
+
+def local_server_credentials(local_connect_type=LocalConnectionType.LOCAL_TCP):
+    """Creates a local ServerCredentials used for local connections.
+
+    This is an EXPERIMENTAL API.
+
+    Local credentials are used by local TCP endpoints (e.g. localhost:10000)
+    also UDS connections.
+
+    The connections created by local server credentials are not
+    encrypted, but will be checked if they are local or not.
+    The UDS connections are considered secure by providing peer authentication
+    and data confidentiality while TCP connections are considered insecure.
+
+    It is allowed to transmit call credentials over connections created by local
+    server credentials.
+
+    Local server credentials are useful for 1) eliminating insecure_channel usage;
+    2) enable unit testing for call credentials without setting up secrets.
+
+    Args:
+      local_connect_type: Local connection type (either
+        grpc.LocalConnectionType.UDS or grpc.LocalConnectionType.LOCAL_TCP)
+
+    Returns:
+      A ServerCredentials for use with a local Server
+    """
+    return ServerCredentials(
+        _cygrpc.server_credentials_local(local_connect_type.value))
+
+
+def alts_channel_credentials(service_accounts=None):
+    """Creates a ChannelCredentials for use with an ALTS-enabled Channel.
+
+    This is an EXPERIMENTAL API.
+    ALTS credentials API can only be used in GCP environment as it relies on
+    handshaker service being available. For more info about ALTS see
+    https://cloud.google.com/security/encryption-in-transit/application-layer-transport-security
+
+    Args:
+      service_accounts: A list of server identities accepted by the client.
+        If target service accounts are provided and none of them matches the
+        peer identity of the server, handshake will fail. The arg can be empty
+        if the client does not have any information about trusted server
+        identity.
+    Returns:
+      A ChannelCredentials for use with an ALTS-enabled Channel
+    """
+    return ChannelCredentials(
+        _cygrpc.channel_credentials_alts(service_accounts or []))
+
+
+def alts_server_credentials():
+    """Creates a ServerCredentials for use with an ALTS-enabled connection.
+
+    This is an EXPERIMENTAL API.
+    ALTS credentials API can only be used in GCP environment as it relies on
+    handshaker service being available. For more info about ALTS see
+    https://cloud.google.com/security/encryption-in-transit/application-layer-transport-security
+
+    Returns:
+      A ServerCredentials for use with an ALTS-enabled Server
+    """
+    return ServerCredentials(_cygrpc.server_credentials_alts())
+
+
+def compute_engine_channel_credentials(call_credentials):
+    """Creates a compute engine channel credential.
+
+    This credential can only be used in a GCP environment as it relies on
+    a handshaker service. For more info about ALTS, see
+    https://cloud.google.com/security/encryption-in-transit/application-layer-transport-security
+
+    This channel credential is expected to be used as part of a composite
+    credential in conjunction with a call credentials that authenticates the
+    VM's default service account. If used with any other sort of call
+    credential, the connection may suddenly and unexpectedly begin failing RPCs.
+    """
+    return ChannelCredentials(
+        _cygrpc.channel_credentials_compute_engine(
+            call_credentials._credentials))
+
+
+def channel_ready_future(channel):
+    """Creates a Future that tracks when a Channel is ready.
+
+    Cancelling the Future does not affect the channel's state machine.
+    It merely decouples the Future from channel state machine.
+
+    Args:
+      channel: A Channel object.
+
+    Returns:
+      A Future object that matures when the channel connectivity is
+      ChannelConnectivity.READY.
+    """
+    from grpc import _utilities  # pylint: disable=cyclic-import
+    return _utilities.channel_ready_future(channel)
+
+
+def insecure_channel(target, options=None, compression=None):
+    """Creates an insecure Channel to a server.
+
+    The returned Channel is thread-safe.
+
+    Args:
+      target: The server address
+      options: An optional list of key-value pairs (:term:`channel_arguments`
+        in gRPC Core runtime) to configure the channel.
+      compression: An optional value indicating the compression method to be
+        used over the lifetime of the channel. This is an EXPERIMENTAL option.
+
+    Returns:
+      A Channel.
+    """
+    from grpc import _channel  # pylint: disable=cyclic-import
+    return _channel.Channel(target, () if options is None else options, None,
+                            compression)
+
+
+def secure_channel(target, credentials, options=None, compression=None):
+    """Creates a secure Channel to a server.
+
+    The returned Channel is thread-safe.
+
+    Args:
+      target: The server address.
+      credentials: A ChannelCredentials instance.
+      options: An optional list of key-value pairs (:term:`channel_arguments`
+        in gRPC Core runtime) to configure the channel.
+      compression: An optional value indicating the compression method to be
+        used over the lifetime of the channel. This is an EXPERIMENTAL option.
+
+    Returns:
+      A Channel.
+    """
+    from grpc import _channel  # pylint: disable=cyclic-import
+    from grpc.experimental import _insecure_channel_credentials
+    if credentials._credentials is _insecure_channel_credentials:
+        raise ValueError(
+            "secure_channel cannot be called with insecure credentials." +
+            " Call insecure_channel instead.")
+    return _channel.Channel(target, () if options is None else options,
+                            credentials._credentials, compression)
+
+
+def intercept_channel(channel, *interceptors):
+    """Intercepts a channel through a set of interceptors.
+
+    Args:
+      channel: A Channel.
+      interceptors: Zero or more objects of type
+        UnaryUnaryClientInterceptor,
+        UnaryStreamClientInterceptor,
+        StreamUnaryClientInterceptor, or
+        StreamStreamClientInterceptor.
+        Interceptors are given control in the order they are listed.
+
+    Returns:
+      A Channel that intercepts each invocation via the provided interceptors.
+
+    Raises:
+      TypeError: If interceptor does not derive from any of
+        UnaryUnaryClientInterceptor,
+        UnaryStreamClientInterceptor,
+        StreamUnaryClientInterceptor, or
+        StreamStreamClientInterceptor.
+    """
+    from grpc import _interceptor  # pylint: disable=cyclic-import
+    return _interceptor.intercept_channel(channel, *interceptors)
+
+
+def server(thread_pool,
+           handlers=None,
+           interceptors=None,
+           options=None,
+           maximum_concurrent_rpcs=None,
+           compression=None,
+           xds=False):
+    """Creates a Server with which RPCs can be serviced.
+
+    Args:
+      thread_pool: A futures.ThreadPoolExecutor to be used by the Server
+        to execute RPC handlers.
+      handlers: An optional list of GenericRpcHandlers used for executing RPCs.
+        More handlers may be added by calling add_generic_rpc_handlers any time
+        before the server is started.
+      interceptors: An optional list of ServerInterceptor objects that observe
+        and optionally manipulate the incoming RPCs before handing them over to
+        handlers. The interceptors are given control in the order they are
+        specified. This is an EXPERIMENTAL API.
+      options: An optional list of key-value pairs (:term:`channel_arguments` in gRPC runtime)
+        to configure the channel.
+      maximum_concurrent_rpcs: The maximum number of concurrent RPCs this server
+        will service before returning RESOURCE_EXHAUSTED status, or None to
+        indicate no limit.
+      compression: An element of grpc.compression, e.g.
+        grpc.compression.Gzip. This compression algorithm will be used for the
+        lifetime of the server unless overridden. This is an EXPERIMENTAL option.
+      xds: If set to true, retrieves server configuration via xDS. This is an
+        EXPERIMENTAL option.
+
+    Returns:
+      A Server object.
+    """
+    from grpc import _server  # pylint: disable=cyclic-import
+    return _server.create_server(thread_pool,
+                                 () if handlers is None else handlers,
+                                 () if interceptors is None else interceptors,
+                                 () if options is None else options,
+                                 maximum_concurrent_rpcs, compression, xds)
+
+
+@contextlib.contextmanager
+def _create_servicer_context(rpc_event, state, request_deserializer):
+    from grpc import _server  # pylint: disable=cyclic-import
+    context = _server._Context(rpc_event, state, request_deserializer)
+    yield context
+    context._finalize_state()  # pylint: disable=protected-access
+
+
+@enum.unique
+class Compression(enum.IntEnum):
+    """Indicates the compression method to be used for an RPC.
+
+       This enumeration is part of an EXPERIMENTAL API.
+
+       Attributes:
+        NoCompression: Do not use compression algorithm.
+        Deflate: Use "Deflate" compression algorithm.
+        Gzip: Use "Gzip" compression algorithm.
+    """
+    NoCompression = _compression.NoCompression
+    Deflate = _compression.Deflate
+    Gzip = _compression.Gzip
+
+
+###################################  __all__  #################################
+
+__all__ = (
+    'FutureTimeoutError',
+    'FutureCancelledError',
+    'Future',
+    'ChannelConnectivity',
+    'StatusCode',
+    'Status',
+    'RpcError',
+    'RpcContext',
+    'Call',
+    'ChannelCredentials',
+    'CallCredentials',
+    'AuthMetadataContext',
+    'AuthMetadataPluginCallback',
+    'AuthMetadataPlugin',
+    'Compression',
+    'ClientCallDetails',
+    'ServerCertificateConfiguration',
+    'ServerCredentials',
+    'LocalConnectionType',
+    'UnaryUnaryMultiCallable',
+    'UnaryStreamMultiCallable',
+    'StreamUnaryMultiCallable',
+    'StreamStreamMultiCallable',
+    'UnaryUnaryClientInterceptor',
+    'UnaryStreamClientInterceptor',
+    'StreamUnaryClientInterceptor',
+    'StreamStreamClientInterceptor',
+    'Channel',
+    'ServicerContext',
+    'RpcMethodHandler',
+    'HandlerCallDetails',
+    'GenericRpcHandler',
+    'ServiceRpcHandler',
+    'Server',
+    'ServerInterceptor',
+    'unary_unary_rpc_method_handler',
+    'unary_stream_rpc_method_handler',
+    'stream_unary_rpc_method_handler',
+    'stream_stream_rpc_method_handler',
+    'method_handlers_generic_handler',
+    'ssl_channel_credentials',
+    'metadata_call_credentials',
+    'access_token_call_credentials',
+    'composite_call_credentials',
+    'composite_channel_credentials',
+    'compute_engine_channel_credentials',
+    'local_channel_credentials',
+    'local_server_credentials',
+    'alts_channel_credentials',
+    'alts_server_credentials',
+    'ssl_server_credentials',
+    'ssl_server_certificate_configuration',
+    'dynamic_ssl_server_credentials',
+    'channel_ready_future',
+    'insecure_channel',
+    'secure_channel',
+    'intercept_channel',
+    'server',
+    'protos',
+    'services',
+    'protos_and_services',
+    'xds_channel_credentials',
+    'xds_server_credentials',
+    'insecure_server_credentials',
+)
+
+############################### Extension Shims ################################
+
+# Here to maintain backwards compatibility; avoid using these in new code!
+try:
+    import grpc_tools
+    sys.modules.update({'grpc.tools': grpc_tools})
+except ImportError:
+    pass
+try:
+    import grpc_health
+    sys.modules.update({'grpc.health': grpc_health})
+except ImportError:
+    pass
+try:
+    import grpc_reflection
+    sys.modules.update({'grpc.reflection': grpc_reflection})
+except ImportError:
+    pass
+
+# Prevents import order issue in the case of renamed path.
+if sys.version_info >= (3, 6) and __name__ == "grpc":
+    from grpc import aio  # pylint: disable=ungrouped-imports
+    sys.modules.update({'grpc.aio': aio})

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/_channel.py

@@ -0,0 +1,1585 @@
+# Copyright 2016 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Invocation-side implementation of gRPC Python."""
+
+import copy
+import functools
+import logging
+import os
+import sys
+import threading
+import time
+
+import grpc
+from grpc import _common
+from grpc import _compression
+from grpc import _grpcio_metadata
+from grpc._cython import cygrpc
+import grpc.experimental
+
+_LOGGER = logging.getLogger(__name__)
+
+_USER_AGENT = 'grpc-python/{}'.format(_grpcio_metadata.__version__)
+
+_EMPTY_FLAGS = 0
+
+# NOTE(rbellevi): No guarantees are given about the maintenance of this
+# environment variable.
+_DEFAULT_SINGLE_THREADED_UNARY_STREAM = os.getenv(
+    "GRPC_SINGLE_THREADED_UNARY_STREAM") is not None
+
+_UNARY_UNARY_INITIAL_DUE = (
+    cygrpc.OperationType.send_initial_metadata,
+    cygrpc.OperationType.send_message,
+    cygrpc.OperationType.send_close_from_client,
+    cygrpc.OperationType.receive_initial_metadata,
+    cygrpc.OperationType.receive_message,
+    cygrpc.OperationType.receive_status_on_client,
+)
+_UNARY_STREAM_INITIAL_DUE = (
+    cygrpc.OperationType.send_initial_metadata,
+    cygrpc.OperationType.send_message,
+    cygrpc.OperationType.send_close_from_client,
+    cygrpc.OperationType.receive_initial_metadata,
+    cygrpc.OperationType.receive_status_on_client,
+)
+_STREAM_UNARY_INITIAL_DUE = (
+    cygrpc.OperationType.send_initial_metadata,
+    cygrpc.OperationType.receive_initial_metadata,
+    cygrpc.OperationType.receive_message,
+    cygrpc.OperationType.receive_status_on_client,
+)
+_STREAM_STREAM_INITIAL_DUE = (
+    cygrpc.OperationType.send_initial_metadata,
+    cygrpc.OperationType.receive_initial_metadata,
+    cygrpc.OperationType.receive_status_on_client,
+)
+
+_CHANNEL_SUBSCRIPTION_CALLBACK_ERROR_LOG_MESSAGE = (
+    'Exception calling channel subscription callback!')
+
+_OK_RENDEZVOUS_REPR_FORMAT = ('<{} of RPC that terminated with:\n'
+                              '\tstatus = {}\n'
+                              '\tdetails = "{}"\n'
+                              '>')
+
+_NON_OK_RENDEZVOUS_REPR_FORMAT = ('<{} of RPC that terminated with:\n'
+                                  '\tstatus = {}\n'
+                                  '\tdetails = "{}"\n'
+                                  '\tdebug_error_string = "{}"\n'
+                                  '>')
+
+
+def _deadline(timeout):
+    return None if timeout is None else time.time() + timeout
+
+
+def _unknown_code_details(unknown_cygrpc_code, details):
+    return 'Server sent unknown code {} and details "{}"'.format(
+        unknown_cygrpc_code, details)
+
+
+class _RPCState(object):
+
+    def __init__(self, due, initial_metadata, trailing_metadata, code, details):
+        # `condition` guards all members of _RPCState. `notify_all` is called on
+        # `condition` when the state of the RPC has changed.
+        self.condition = threading.Condition()
+
+        # The cygrpc.OperationType objects representing events due from the RPC's
+        # completion queue. If an operation is in `due`, it is guaranteed that
+        # `operate()` has been called on a corresponding operation. But the
+        # converse is not true. That is, in the case of failed `operate()`
+        # calls, there may briefly be events in `due` that do not correspond to
+        # operations submitted to Core.
+        self.due = set(due)
+        self.initial_metadata = initial_metadata
+        self.response = None
+        self.trailing_metadata = trailing_metadata
+        self.code = code
+        self.details = details
+        self.debug_error_string = None
+
+        # The semantics of grpc.Future.cancel and grpc.Future.cancelled are
+        # slightly wonky, so they have to be tracked separately from the rest of the
+        # result of the RPC. This field tracks whether cancellation was requested
+        # prior to termination of the RPC.
+        self.cancelled = False
+        self.callbacks = []
+        self.fork_epoch = cygrpc.get_fork_epoch()
+
+    def reset_postfork_child(self):
+        self.condition = threading.Condition()
+
+
+def _abort(state, code, details):
+    if state.code is None:
+        state.code = code
+        state.details = details
+        if state.initial_metadata is None:
+            state.initial_metadata = ()
+        state.trailing_metadata = ()
+
+
+def _handle_event(event, state, response_deserializer):
+    callbacks = []
+    for batch_operation in event.batch_operations:
+        operation_type = batch_operation.type()
+        state.due.remove(operation_type)
+        if operation_type == cygrpc.OperationType.receive_initial_metadata:
+            state.initial_metadata = batch_operation.initial_metadata()
+        elif operation_type == cygrpc.OperationType.receive_message:
+            serialized_response = batch_operation.message()
+            if serialized_response is not None:
+                response = _common.deserialize(serialized_response,
+                                               response_deserializer)
+                if response is None:
+                    details = 'Exception deserializing response!'
+                    _abort(state, grpc.StatusCode.INTERNAL, details)
+                else:
+                    state.response = response
+        elif operation_type == cygrpc.OperationType.receive_status_on_client:
+            state.trailing_metadata = batch_operation.trailing_metadata()
+            if state.code is None:
+                code = _common.CYGRPC_STATUS_CODE_TO_STATUS_CODE.get(
+                    batch_operation.code())
+                if code is None:
+                    state.code = grpc.StatusCode.UNKNOWN
+                    state.details = _unknown_code_details(
+                        code, batch_operation.details())
+                else:
+                    state.code = code
+                    state.details = batch_operation.details()
+                    state.debug_error_string = batch_operation.error_string()
+            callbacks.extend(state.callbacks)
+            state.callbacks = None
+    return callbacks
+
+
+def _event_handler(state, response_deserializer):
+
+    def handle_event(event):
+        with state.condition:
+            callbacks = _handle_event(event, state, response_deserializer)
+            state.condition.notify_all()
+            done = not state.due
+        for callback in callbacks:
+            try:
+                callback()
+            except Exception as e:  # pylint: disable=broad-except
+                # NOTE(rbellevi): We suppress but log errors here so as not to
+                # kill the channel spin thread.
+                logging.error('Exception in callback %s: %s',
+                              repr(callback.func), repr(e))
+        return done and state.fork_epoch >= cygrpc.get_fork_epoch()
+
+    return handle_event
+
+
+#pylint: disable=too-many-statements
+def _consume_request_iterator(request_iterator, state, call, request_serializer,
+                              event_handler):
+    """Consume a request iterator supplied by the user."""
+
+    def consume_request_iterator():  # pylint: disable=too-many-branches
+        # Iterate over the request iterator until it is exhausted or an error
+        # condition is encountered.
+        while True:
+            return_from_user_request_generator_invoked = False
+            try:
+                # The thread may die in user-code. Do not block fork for this.
+                cygrpc.enter_user_request_generator()
+                request = next(request_iterator)
+            except StopIteration:
+                break
+            except Exception:  # pylint: disable=broad-except
+                cygrpc.return_from_user_request_generator()
+                return_from_user_request_generator_invoked = True
+                code = grpc.StatusCode.UNKNOWN
+                details = 'Exception iterating requests!'
+                _LOGGER.exception(details)
+                call.cancel(_common.STATUS_CODE_TO_CYGRPC_STATUS_CODE[code],
+                            details)
+                _abort(state, code, details)
+                return
+            finally:
+                if not return_from_user_request_generator_invoked:
+                    cygrpc.return_from_user_request_generator()
+            serialized_request = _common.serialize(request, request_serializer)
+            with state.condition:
+                if state.code is None and not state.cancelled:
+                    if serialized_request is None:
+                        code = grpc.StatusCode.INTERNAL
+                        details = 'Exception serializing request!'
+                        call.cancel(
+                            _common.STATUS_CODE_TO_CYGRPC_STATUS_CODE[code],
+                            details)
+                        _abort(state, code, details)
+                        return
+                    else:
+                        state.due.add(cygrpc.OperationType.send_message)
+                        operations = (cygrpc.SendMessageOperation(
+                            serialized_request, _EMPTY_FLAGS),)
+                        operating = call.operate(operations, event_handler)
+                        if not operating:
+                            state.due.remove(cygrpc.OperationType.send_message)
+                            return
+
+                        def _done():
+                            return (state.code is not None or
+                                    cygrpc.OperationType.send_message
+                                    not in state.due)
+
+                        _common.wait(state.condition.wait,
+                                     _done,
+                                     spin_cb=functools.partial(
+                                         cygrpc.block_if_fork_in_progress,
+                                         state))
+                        if state.code is not None:
+                            return
+                else:
+                    return
+        with state.condition:
+            if state.code is None:
+                state.due.add(cygrpc.OperationType.send_close_from_client)
+                operations = (
+                    cygrpc.SendCloseFromClientOperation(_EMPTY_FLAGS),)
+                operating = call.operate(operations, event_handler)
+                if not operating:
+                    state.due.remove(
+                        cygrpc.OperationType.send_close_from_client)
+
+    consumption_thread = cygrpc.ForkManagedThread(
+        target=consume_request_iterator)
+    consumption_thread.setDaemon(True)
+    consumption_thread.start()
+
+
+def _rpc_state_string(class_name, rpc_state):
+    """Calculates error string for RPC."""
+    with rpc_state.condition:
+        if rpc_state.code is None:
+            return '<{} object>'.format(class_name)
+        elif rpc_state.code is grpc.StatusCode.OK:
+            return _OK_RENDEZVOUS_REPR_FORMAT.format(class_name, rpc_state.code,
+                                                     rpc_state.details)
+        else:
+            return _NON_OK_RENDEZVOUS_REPR_FORMAT.format(
+                class_name, rpc_state.code, rpc_state.details,
+                rpc_state.debug_error_string)
+
+
+class _InactiveRpcError(grpc.RpcError, grpc.Call, grpc.Future):
+    """An RPC error not tied to the execution of a particular RPC.
+
+    The RPC represented by the state object must not be in-progress or
+    cancelled.
+
+    Attributes:
+      _state: An instance of _RPCState.
+    """
+
+    def __init__(self, state):
+        with state.condition:
+            self._state = _RPCState((), copy.deepcopy(state.initial_metadata),
+                                    copy.deepcopy(state.trailing_metadata),
+                                    state.code, copy.deepcopy(state.details))
+            self._state.response = copy.copy(state.response)
+            self._state.debug_error_string = copy.copy(state.debug_error_string)
+
+    def initial_metadata(self):
+        return self._state.initial_metadata
+
+    def trailing_metadata(self):
+        return self._state.trailing_metadata
+
+    def code(self):
+        return self._state.code
+
+    def details(self):
+        return _common.decode(self._state.details)
+
+    def debug_error_string(self):
+        return _common.decode(self._state.debug_error_string)
+
+    def _repr(self):
+        return _rpc_state_string(self.__class__.__name__, self._state)
+
+    def __repr__(self):
+        return self._repr()
+
+    def __str__(self):
+        return self._repr()
+
+    def cancel(self):
+        """See grpc.Future.cancel."""
+        return False
+
+    def cancelled(self):
+        """See grpc.Future.cancelled."""
+        return False
+
+    def running(self):
+        """See grpc.Future.running."""
+        return False
+
+    def done(self):
+        """See grpc.Future.done."""
+        return True
+
+    def result(self, timeout=None):  # pylint: disable=unused-argument
+        """See grpc.Future.result."""
+        raise self
+
+    def exception(self, timeout=None):  # pylint: disable=unused-argument
+        """See grpc.Future.exception."""
+        return self
+
+    def traceback(self, timeout=None):  # pylint: disable=unused-argument
+        """See grpc.Future.traceback."""
+        try:
+            raise self
+        except grpc.RpcError:
+            return sys.exc_info()[2]
+
+    def add_done_callback(self, fn, timeout=None):  # pylint: disable=unused-argument
+        """See grpc.Future.add_done_callback."""
+        fn(self)
+
+
+class _Rendezvous(grpc.RpcError, grpc.RpcContext):
+    """An RPC iterator.
+
+    Attributes:
+      _state: An instance of _RPCState.
+      _call: An instance of SegregatedCall or IntegratedCall.
+        In either case, the _call object is expected to have operate, cancel,
+        and next_event methods.
+      _response_deserializer: A callable taking bytes and return a Python
+        object.
+      _deadline: A float representing the deadline of the RPC in seconds. Or
+        possibly None, to represent an RPC with no deadline at all.
+    """
+
+    def __init__(self, state, call, response_deserializer, deadline):
+        super(_Rendezvous, self).__init__()
+        self._state = state
+        self._call = call
+        self._response_deserializer = response_deserializer
+        self._deadline = deadline
+
+    def is_active(self):
+        """See grpc.RpcContext.is_active"""
+        with self._state.condition:
+            return self._state.code is None
+
+    def time_remaining(self):
+        """See grpc.RpcContext.time_remaining"""
+        with self._state.condition:
+            if self._deadline is None:
+                return None
+            else:
+                return max(self._deadline - time.time(), 0)
+
+    def cancel(self):
+        """See grpc.RpcContext.cancel"""
+        with self._state.condition:
+            if self._state.code is None:
+                code = grpc.StatusCode.CANCELLED
+                details = 'Locally cancelled by application!'
+                self._call.cancel(
+                    _common.STATUS_CODE_TO_CYGRPC_STATUS_CODE[code], details)
+                self._state.cancelled = True
+                _abort(self._state, code, details)
+                self._state.condition.notify_all()
+                return True
+            else:
+                return False
+
+    def add_callback(self, callback):
+        """See grpc.RpcContext.add_callback"""
+        with self._state.condition:
+            if self._state.callbacks is None:
+                return False
+            else:
+                self._state.callbacks.append(callback)
+                return True
+
+    def __iter__(self):
+        return self
+
+    def next(self):
+        return self._next()
+
+    def __next__(self):
+        return self._next()
+
+    def _next(self):
+        raise NotImplementedError()
+
+    def debug_error_string(self):
+        raise NotImplementedError()
+
+    def _repr(self):
+        return _rpc_state_string(self.__class__.__name__, self._state)
+
+    def __repr__(self):
+        return self._repr()
+
+    def __str__(self):
+        return self._repr()
+
+    def __del__(self):
+        with self._state.condition:
+            if self._state.code is None:
+                self._state.code = grpc.StatusCode.CANCELLED
+                self._state.details = 'Cancelled upon garbage collection!'
+                self._state.cancelled = True
+                self._call.cancel(
+                    _common.STATUS_CODE_TO_CYGRPC_STATUS_CODE[self._state.code],
+                    self._state.details)
+                self._state.condition.notify_all()
+
+
+class _SingleThreadedRendezvous(_Rendezvous, grpc.Call, grpc.Future):  # pylint: disable=too-many-ancestors
+    """An RPC iterator operating entirely on a single thread.
+
+    The __next__ method of _SingleThreadedRendezvous does not depend on the
+    existence of any other thread, including the "channel spin thread".
+    However, this means that its interface is entirely synchronous. So this
+    class cannot completely fulfill the grpc.Future interface. The result,
+    exception, and traceback methods will never block and will instead raise
+    an exception if calling the method would result in blocking.
+
+    This means that these methods are safe to call from add_done_callback
+    handlers.
+    """
+
+    def _is_complete(self):
+        return self._state.code is not None
+
+    def cancelled(self):
+        with self._state.condition:
+            return self._state.cancelled
+
+    def running(self):
+        with self._state.condition:
+            return self._state.code is None
+
+    def done(self):
+        with self._state.condition:
+            return self._state.code is not None
+
+    def result(self, timeout=None):
+        """Returns the result of the computation or raises its exception.
+
+        This method will never block. Instead, it will raise an exception
+        if calling this method would otherwise result in blocking.
+
+        Since this method will never block, any `timeout` argument passed will
+        be ignored.
+        """
+        del timeout
+        with self._state.condition:
+            if not self._is_complete():
+                raise grpc.experimental.UsageError(
+                    "_SingleThreadedRendezvous only supports result() when the RPC is complete."
+                )
+            if self._state.code is grpc.StatusCode.OK:
+                return self._state.response
+            elif self._state.cancelled:
+                raise grpc.FutureCancelledError()
+            else:
+                raise self
+
+    def exception(self, timeout=None):
+        """Return the exception raised by the computation.
+
+        This method will never block. Instead, it will raise an exception
+        if calling this method would otherwise result in blocking.
+
+        Since this method will never block, any `timeout` argument passed will
+        be ignored.
+        """
+        del timeout
+        with self._state.condition:
+            if not self._is_complete():
+                raise grpc.experimental.UsageError(
+                    "_SingleThreadedRendezvous only supports exception() when the RPC is complete."
+                )
+            if self._state.code is grpc.StatusCode.OK:
+                return None
+            elif self._state.cancelled:
+                raise grpc.FutureCancelledError()
+            else:
+                return self
+
+    def traceback(self, timeout=None):
+        """Access the traceback of the exception raised by the computation.
+
+        This method will never block. Instead, it will raise an exception
+        if calling this method would otherwise result in blocking.
+
+        Since this method will never block, any `timeout` argument passed will
+        be ignored.
+        """
+        del timeout
+        with self._state.condition:
+            if not self._is_complete():
+                raise grpc.experimental.UsageError(
+                    "_SingleThreadedRendezvous only supports traceback() when the RPC is complete."
+                )
+            if self._state.code is grpc.StatusCode.OK:
+                return None
+            elif self._state.cancelled:
+                raise grpc.FutureCancelledError()
+            else:
+                try:
+                    raise self
+                except grpc.RpcError:
+                    return sys.exc_info()[2]
+
+    def add_done_callback(self, fn):
+        with self._state.condition:
+            if self._state.code is None:
+                self._state.callbacks.append(functools.partial(fn, self))
+                return
+
+        fn(self)
+
+    def initial_metadata(self):
+        """See grpc.Call.initial_metadata"""
+        with self._state.condition:
+            # NOTE(gnossen): Based on our initial call batch, we are guaranteed
+            # to receive initial metadata before any messages.
+            while self._state.initial_metadata is None:
+                self._consume_next_event()
+            return self._state.initial_metadata
+
+    def trailing_metadata(self):
+        """See grpc.Call.trailing_metadata"""
+        with self._state.condition:
+            if self._state.trailing_metadata is None:
+                raise grpc.experimental.UsageError(
+                    "Cannot get trailing metadata until RPC is completed.")
+            return self._state.trailing_metadata
+
+    def code(self):
+        """See grpc.Call.code"""
+        with self._state.condition:
+            if self._state.code is None:
+                raise grpc.experimental.UsageError(
+                    "Cannot get code until RPC is completed.")
+            return self._state.code
+
+    def details(self):
+        """See grpc.Call.details"""
+        with self._state.condition:
+            if self._state.details is None:
+                raise grpc.experimental.UsageError(
+                    "Cannot get details until RPC is completed.")
+            return _common.decode(self._state.details)
+
+    def _consume_next_event(self):
+        event = self._call.next_event()
+        with self._state.condition:
+            callbacks = _handle_event(event, self._state,
+                                      self._response_deserializer)
+            for callback in callbacks:
+                # NOTE(gnossen): We intentionally allow exceptions to bubble up
+                # to the user when running on a single thread.
+                callback()
+        return event
+
+    def _next_response(self):
+        while True:
+            self._consume_next_event()
+            with self._state.condition:
+                if self._state.response is not None:
+                    response = self._state.response
+                    self._state.response = None
+                    return response
+                elif cygrpc.OperationType.receive_message not in self._state.due:
+                    if self._state.code is grpc.StatusCode.OK:
+                        raise StopIteration()
+                    elif self._state.code is not None:
+                        raise self
+
+    def _next(self):
+        with self._state.condition:
+            if self._state.code is None:
+                # We tentatively add the operation as expected and remove
+                # it if the enqueue operation fails. This allows us to guarantee that
+                # if an event has been submitted to the core completion queue,
+                # it is in `due`. If we waited until after a successful
+                # enqueue operation then a signal could interrupt this
+                # thread between the enqueue operation and the addition of the
+                # operation to `due`. This would cause an exception on the
+                # channel spin thread when the operation completes and no
+                # corresponding operation would be present in state.due.
+                # Note that, since `condition` is held through this block, there is
+                # no data race on `due`.
+                self._state.due.add(cygrpc.OperationType.receive_message)
+                operating = self._call.operate(
+                    (cygrpc.ReceiveMessageOperation(_EMPTY_FLAGS),), None)
+                if not operating:
+                    self._state.due.remove(cygrpc.OperationType.receive_message)
+            elif self._state.code is grpc.StatusCode.OK:
+                raise StopIteration()
+            else:
+                raise self
+        return self._next_response()
+
+    def debug_error_string(self):
+        with self._state.condition:
+            if self._state.debug_error_string is None:
+                raise grpc.experimental.UsageError(
+                    "Cannot get debug error string until RPC is completed.")
+            return _common.decode(self._state.debug_error_string)
+
+
+class _MultiThreadedRendezvous(_Rendezvous, grpc.Call, grpc.Future):  # pylint: disable=too-many-ancestors
+    """An RPC iterator that depends on a channel spin thread.
+
+    This iterator relies upon a per-channel thread running in the background,
+    dequeueing events from the completion queue, and notifying threads waiting
+    on the threading.Condition object in the _RPCState object.
+
+    This extra thread allows _MultiThreadedRendezvous to fulfill the grpc.Future interface
+    and to mediate a bidirection streaming RPC.
+    """
+
+    def initial_metadata(self):
+        """See grpc.Call.initial_metadata"""
+        with self._state.condition:
+
+            def _done():
+                return self._state.initial_metadata is not None
+
+            _common.wait(self._state.condition.wait, _done)
+            return self._state.initial_metadata
+
+    def trailing_metadata(self):
+        """See grpc.Call.trailing_metadata"""
+        with self._state.condition:
+
+            def _done():
+                return self._state.trailing_metadata is not None
+
+            _common.wait(self._state.condition.wait, _done)
+            return self._state.trailing_metadata
+
+    def code(self):
+        """See grpc.Call.code"""
+        with self._state.condition:
+
+            def _done():
+                return self._state.code is not None
+
+            _common.wait(self._state.condition.wait, _done)
+            return self._state.code
+
+    def details(self):
+        """See grpc.Call.details"""
+        with self._state.condition:
+
+            def _done():
+                return self._state.details is not None
+
+            _common.wait(self._state.condition.wait, _done)
+            return _common.decode(self._state.details)
+
+    def debug_error_string(self):
+        with self._state.condition:
+
+            def _done():
+                return self._state.debug_error_string is not None
+
+            _common.wait(self._state.condition.wait, _done)
+            return _common.decode(self._state.debug_error_string)
+
+    def cancelled(self):
+        with self._state.condition:
+            return self._state.cancelled
+
+    def running(self):
+        with self._state.condition:
+            return self._state.code is None
+
+    def done(self):
+        with self._state.condition:
+            return self._state.code is not None
+
+    def _is_complete(self):
+        return self._state.code is not None
+
+    def result(self, timeout=None):
+        """Returns the result of the computation or raises its exception.
+
+        See grpc.Future.result for the full API contract.
+        """
+        with self._state.condition:
+            timed_out = _common.wait(self._state.condition.wait,
+                                     self._is_complete,
+                                     timeout=timeout)
+            if timed_out:
+                raise grpc.FutureTimeoutError()
+            else:
+                if self._state.code is grpc.StatusCode.OK:
+                    return self._state.response
+                elif self._state.cancelled:
+                    raise grpc.FutureCancelledError()
+                else:
+                    raise self
+
+    def exception(self, timeout=None):
+        """Return the exception raised by the computation.
+
+        See grpc.Future.exception for the full API contract.
+        """
+        with self._state.condition:
+            timed_out = _common.wait(self._state.condition.wait,
+                                     self._is_complete,
+                                     timeout=timeout)
+            if timed_out:
+                raise grpc.FutureTimeoutError()
+            else:
+                if self._state.code is grpc.StatusCode.OK:
+                    return None
+                elif self._state.cancelled:
+                    raise grpc.FutureCancelledError()
+                else:
+                    return self
+
+    def traceback(self, timeout=None):
+        """Access the traceback of the exception raised by the computation.
+
+        See grpc.future.traceback for the full API contract.
+        """
+        with self._state.condition:
+            timed_out = _common.wait(self._state.condition.wait,
+                                     self._is_complete,
+                                     timeout=timeout)
+            if timed_out:
+                raise grpc.FutureTimeoutError()
+            else:
+                if self._state.code is grpc.StatusCode.OK:
+                    return None
+                elif self._state.cancelled:
+                    raise grpc.FutureCancelledError()
+                else:
+                    try:
+                        raise self
+                    except grpc.RpcError:
+                        return sys.exc_info()[2]
+
+    def add_done_callback(self, fn):
+        with self._state.condition:
+            if self._state.code is None:
+                self._state.callbacks.append(functools.partial(fn, self))
+                return
+
+        fn(self)
+
+    def _next(self):
+        with self._state.condition:
+            if self._state.code is None:
+                event_handler = _event_handler(self._state,
+                                               self._response_deserializer)
+                self._state.due.add(cygrpc.OperationType.receive_message)
+                operating = self._call.operate(
+                    (cygrpc.ReceiveMessageOperation(_EMPTY_FLAGS),),
+                    event_handler)
+                if not operating:
+                    self._state.due.remove(cygrpc.OperationType.receive_message)
+            elif self._state.code is grpc.StatusCode.OK:
+                raise StopIteration()
+            else:
+                raise self
+
+            def _response_ready():
+                return (self._state.response is not None or
+                        (cygrpc.OperationType.receive_message
+                         not in self._state.due and
+                         self._state.code is not None))
+
+            _common.wait(self._state.condition.wait, _response_ready)
+            if self._state.response is not None:
+                response = self._state.response
+                self._state.response = None
+                return response
+            elif cygrpc.OperationType.receive_message not in self._state.due:
+                if self._state.code is grpc.StatusCode.OK:
+                    raise StopIteration()
+                elif self._state.code is not None:
+                    raise self
+
+
+def _start_unary_request(request, timeout, request_serializer):
+    deadline = _deadline(timeout)
+    serialized_request = _common.serialize(request, request_serializer)
+    if serialized_request is None:
+        state = _RPCState((), (), (), grpc.StatusCode.INTERNAL,
+                          'Exception serializing request!')
+        error = _InactiveRpcError(state)
+        return deadline, None, error
+    else:
+        return deadline, serialized_request, None
+
+
+def _end_unary_response_blocking(state, call, with_call, deadline):
+    if state.code is grpc.StatusCode.OK:
+        if with_call:
+            rendezvous = _MultiThreadedRendezvous(state, call, None, deadline)
+            return state.response, rendezvous
+        else:
+            return state.response
+    else:
+        raise _InactiveRpcError(state)
+
+
+def _stream_unary_invocation_operationses(metadata, initial_metadata_flags):
+    return (
+        (
+            cygrpc.SendInitialMetadataOperation(metadata,
+                                                initial_metadata_flags),
+            cygrpc.ReceiveMessageOperation(_EMPTY_FLAGS),
+            cygrpc.ReceiveStatusOnClientOperation(_EMPTY_FLAGS),
+        ),
+        (cygrpc.ReceiveInitialMetadataOperation(_EMPTY_FLAGS),),
+    )
+
+
+def _stream_unary_invocation_operationses_and_tags(metadata,
+                                                   initial_metadata_flags):
+    return tuple((
+        operations,
+        None,
+    ) for operations in _stream_unary_invocation_operationses(
+        metadata, initial_metadata_flags))
+
+
+def _determine_deadline(user_deadline):
+    parent_deadline = cygrpc.get_deadline_from_context()
+    if parent_deadline is None and user_deadline is None:
+        return None
+    elif parent_deadline is not None and user_deadline is None:
+        return parent_deadline
+    elif user_deadline is not None and parent_deadline is None:
+        return user_deadline
+    else:
+        return min(parent_deadline, user_deadline)
+
+
+class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
+
+    # pylint: disable=too-many-arguments
+    def __init__(self, channel, managed_call, method, request_serializer,
+                 response_deserializer):
+        self._channel = channel
+        self._managed_call = managed_call
+        self._method = method
+        self._request_serializer = request_serializer
+        self._response_deserializer = response_deserializer
+        self._context = cygrpc.build_census_context()
+
+    def _prepare(self, request, timeout, metadata, wait_for_ready, compression):
+        deadline, serialized_request, rendezvous = _start_unary_request(
+            request, timeout, self._request_serializer)
+        initial_metadata_flags = _InitialMetadataFlags().with_wait_for_ready(
+            wait_for_ready)
+        augmented_metadata = _compression.augment_metadata(
+            metadata, compression)
+        if serialized_request is None:
+            return None, None, None, rendezvous
+        else:
+            state = _RPCState(_UNARY_UNARY_INITIAL_DUE, None, None, None, None)
+            operations = (
+                cygrpc.SendInitialMetadataOperation(augmented_metadata,
+                                                    initial_metadata_flags),
+                cygrpc.SendMessageOperation(serialized_request, _EMPTY_FLAGS),
+                cygrpc.SendCloseFromClientOperation(_EMPTY_FLAGS),
+                cygrpc.ReceiveInitialMetadataOperation(_EMPTY_FLAGS),
+                cygrpc.ReceiveMessageOperation(_EMPTY_FLAGS),
+                cygrpc.ReceiveStatusOnClientOperation(_EMPTY_FLAGS),
+            )
+            return state, operations, deadline, None
+
+    def _blocking(self, request, timeout, metadata, credentials, wait_for_ready,
+                  compression):
+        state, operations, deadline, rendezvous = self._prepare(
+            request, timeout, metadata, wait_for_ready, compression)
+        if state is None:
+            raise rendezvous  # pylint: disable-msg=raising-bad-type
+        else:
+            call = self._channel.segregated_call(
+                cygrpc.PropagationConstants.GRPC_PROPAGATE_DEFAULTS,
+                self._method, None, _determine_deadline(deadline), metadata,
+                None if credentials is None else credentials._credentials, ((
+                    operations,
+                    None,
+                ),), self._context)
+            event = call.next_event()
+            _handle_event(event, state, self._response_deserializer)
+            return state, call
+
+    def __call__(self,
+                 request,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        state, call, = self._blocking(request, timeout, metadata, credentials,
+                                      wait_for_ready, compression)
+        return _end_unary_response_blocking(state, call, False, None)
+
+    def with_call(self,
+                  request,
+                  timeout=None,
+                  metadata=None,
+                  credentials=None,
+                  wait_for_ready=None,
+                  compression=None):
+        state, call, = self._blocking(request, timeout, metadata, credentials,
+                                      wait_for_ready, compression)
+        return _end_unary_response_blocking(state, call, True, None)
+
+    def future(self,
+               request,
+               timeout=None,
+               metadata=None,
+               credentials=None,
+               wait_for_ready=None,
+               compression=None):
+        state, operations, deadline, rendezvous = self._prepare(
+            request, timeout, metadata, wait_for_ready, compression)
+        if state is None:
+            raise rendezvous  # pylint: disable-msg=raising-bad-type
+        else:
+            event_handler = _event_handler(state, self._response_deserializer)
+            call = self._managed_call(
+                cygrpc.PropagationConstants.GRPC_PROPAGATE_DEFAULTS,
+                self._method, None, deadline, metadata,
+                None if credentials is None else credentials._credentials,
+                (operations,), event_handler, self._context)
+            return _MultiThreadedRendezvous(state, call,
+                                            self._response_deserializer,
+                                            deadline)
+
+
+class _SingleThreadedUnaryStreamMultiCallable(grpc.UnaryStreamMultiCallable):
+
+    # pylint: disable=too-many-arguments
+    def __init__(self, channel, method, request_serializer,
+                 response_deserializer):
+        self._channel = channel
+        self._method = method
+        self._request_serializer = request_serializer
+        self._response_deserializer = response_deserializer
+        self._context = cygrpc.build_census_context()
+
+    def __call__(  # pylint: disable=too-many-locals
+            self,
+            request,
+            timeout=None,
+            metadata=None,
+            credentials=None,
+            wait_for_ready=None,
+            compression=None):
+        deadline = _deadline(timeout)
+        serialized_request = _common.serialize(request,
+                                               self._request_serializer)
+        if serialized_request is None:
+            state = _RPCState((), (), (), grpc.StatusCode.INTERNAL,
+                              'Exception serializing request!')
+            raise _InactiveRpcError(state)
+
+        state = _RPCState(_UNARY_STREAM_INITIAL_DUE, None, None, None, None)
+        call_credentials = None if credentials is None else credentials._credentials
+        initial_metadata_flags = _InitialMetadataFlags().with_wait_for_ready(
+            wait_for_ready)
+        augmented_metadata = _compression.augment_metadata(
+            metadata, compression)
+        operations = (
+            (cygrpc.SendInitialMetadataOperation(augmented_metadata,
+                                                 initial_metadata_flags),
+             cygrpc.SendMessageOperation(serialized_request, _EMPTY_FLAGS),
+             cygrpc.SendCloseFromClientOperation(_EMPTY_FLAGS)),
+            (cygrpc.ReceiveStatusOnClientOperation(_EMPTY_FLAGS),),
+            (cygrpc.ReceiveInitialMetadataOperation(_EMPTY_FLAGS),),
+        )
+        operations_and_tags = tuple((ops, None) for ops in operations)
+        call = self._channel.segregated_call(
+            cygrpc.PropagationConstants.GRPC_PROPAGATE_DEFAULTS, self._method,
+            None, _determine_deadline(deadline), metadata, call_credentials,
+            operations_and_tags, self._context)
+        return _SingleThreadedRendezvous(state, call,
+                                         self._response_deserializer, deadline)
+
+
+class _UnaryStreamMultiCallable(grpc.UnaryStreamMultiCallable):
+
+    # pylint: disable=too-many-arguments
+    def __init__(self, channel, managed_call, method, request_serializer,
+                 response_deserializer):
+        self._channel = channel
+        self._managed_call = managed_call
+        self._method = method
+        self._request_serializer = request_serializer
+        self._response_deserializer = response_deserializer
+        self._context = cygrpc.build_census_context()
+
+    def __call__(  # pylint: disable=too-many-locals
+            self,
+            request,
+            timeout=None,
+            metadata=None,
+            credentials=None,
+            wait_for_ready=None,
+            compression=None):
+        deadline, serialized_request, rendezvous = _start_unary_request(
+            request, timeout, self._request_serializer)
+        initial_metadata_flags = _InitialMetadataFlags().with_wait_for_ready(
+            wait_for_ready)
+        if serialized_request is None:
+            raise rendezvous  # pylint: disable-msg=raising-bad-type
+        else:
+            augmented_metadata = _compression.augment_metadata(
+                metadata, compression)
+            state = _RPCState(_UNARY_STREAM_INITIAL_DUE, None, None, None, None)
+            operationses = (
+                (
+                    cygrpc.SendInitialMetadataOperation(augmented_metadata,
+                                                        initial_metadata_flags),
+                    cygrpc.SendMessageOperation(serialized_request,
+                                                _EMPTY_FLAGS),
+                    cygrpc.SendCloseFromClientOperation(_EMPTY_FLAGS),
+                    cygrpc.ReceiveStatusOnClientOperation(_EMPTY_FLAGS),
+                ),
+                (cygrpc.ReceiveInitialMetadataOperation(_EMPTY_FLAGS),),
+            )
+            call = self._managed_call(
+                cygrpc.PropagationConstants.GRPC_PROPAGATE_DEFAULTS,
+                self._method, None, _determine_deadline(deadline), metadata,
+                None if credentials is None else credentials._credentials,
+                operationses, _event_handler(state,
+                                             self._response_deserializer),
+                self._context)
+            return _MultiThreadedRendezvous(state, call,
+                                            self._response_deserializer,
+                                            deadline)
+
+
+class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
+
+    # pylint: disable=too-many-arguments
+    def __init__(self, channel, managed_call, method, request_serializer,
+                 response_deserializer):
+        self._channel = channel
+        self._managed_call = managed_call
+        self._method = method
+        self._request_serializer = request_serializer
+        self._response_deserializer = response_deserializer
+        self._context = cygrpc.build_census_context()
+
+    def _blocking(self, request_iterator, timeout, metadata, credentials,
+                  wait_for_ready, compression):
+        deadline = _deadline(timeout)
+        state = _RPCState(_STREAM_UNARY_INITIAL_DUE, None, None, None, None)
+        initial_metadata_flags = _InitialMetadataFlags().with_wait_for_ready(
+            wait_for_ready)
+        augmented_metadata = _compression.augment_metadata(
+            metadata, compression)
+        call = self._channel.segregated_call(
+            cygrpc.PropagationConstants.GRPC_PROPAGATE_DEFAULTS, self._method,
+            None, _determine_deadline(deadline), augmented_metadata,
+            None if credentials is None else credentials._credentials,
+            _stream_unary_invocation_operationses_and_tags(
+                augmented_metadata, initial_metadata_flags), self._context)
+        _consume_request_iterator(request_iterator, state, call,
+                                  self._request_serializer, None)
+        while True:
+            event = call.next_event()
+            with state.condition:
+                _handle_event(event, state, self._response_deserializer)
+                state.condition.notify_all()
+                if not state.due:
+                    break
+        return state, call
+
+    def __call__(self,
+                 request_iterator,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        state, call, = self._blocking(request_iterator, timeout, metadata,
+                                      credentials, wait_for_ready, compression)
+        return _end_unary_response_blocking(state, call, False, None)
+
+    def with_call(self,
+                  request_iterator,
+                  timeout=None,
+                  metadata=None,
+                  credentials=None,
+                  wait_for_ready=None,
+                  compression=None):
+        state, call, = self._blocking(request_iterator, timeout, metadata,
+                                      credentials, wait_for_ready, compression)
+        return _end_unary_response_blocking(state, call, True, None)
+
+    def future(self,
+               request_iterator,
+               timeout=None,
+               metadata=None,
+               credentials=None,
+               wait_for_ready=None,
+               compression=None):
+        deadline = _deadline(timeout)
+        state = _RPCState(_STREAM_UNARY_INITIAL_DUE, None, None, None, None)
+        event_handler = _event_handler(state, self._response_deserializer)
+        initial_metadata_flags = _InitialMetadataFlags().with_wait_for_ready(
+            wait_for_ready)
+        augmented_metadata = _compression.augment_metadata(
+            metadata, compression)
+        call = self._managed_call(
+            cygrpc.PropagationConstants.GRPC_PROPAGATE_DEFAULTS, self._method,
+            None, deadline, augmented_metadata,
+            None if credentials is None else credentials._credentials,
+            _stream_unary_invocation_operationses(metadata,
+                                                  initial_metadata_flags),
+            event_handler, self._context)
+        _consume_request_iterator(request_iterator, state, call,
+                                  self._request_serializer, event_handler)
+        return _MultiThreadedRendezvous(state, call,
+                                        self._response_deserializer, deadline)
+
+
+class _StreamStreamMultiCallable(grpc.StreamStreamMultiCallable):
+
+    # pylint: disable=too-many-arguments
+    def __init__(self, channel, managed_call, method, request_serializer,
+                 response_deserializer):
+        self._channel = channel
+        self._managed_call = managed_call
+        self._method = method
+        self._request_serializer = request_serializer
+        self._response_deserializer = response_deserializer
+        self._context = cygrpc.build_census_context()
+
+    def __call__(self,
+                 request_iterator,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        deadline = _deadline(timeout)
+        state = _RPCState(_STREAM_STREAM_INITIAL_DUE, None, None, None, None)
+        initial_metadata_flags = _InitialMetadataFlags().with_wait_for_ready(
+            wait_for_ready)
+        augmented_metadata = _compression.augment_metadata(
+            metadata, compression)
+        operationses = (
+            (
+                cygrpc.SendInitialMetadataOperation(augmented_metadata,
+                                                    initial_metadata_flags),
+                cygrpc.ReceiveStatusOnClientOperation(_EMPTY_FLAGS),
+            ),
+            (cygrpc.ReceiveInitialMetadataOperation(_EMPTY_FLAGS),),
+        )
+        event_handler = _event_handler(state, self._response_deserializer)
+        call = self._managed_call(
+            cygrpc.PropagationConstants.GRPC_PROPAGATE_DEFAULTS, self._method,
+            None, _determine_deadline(deadline), augmented_metadata,
+            None if credentials is None else credentials._credentials,
+            operationses, event_handler, self._context)
+        _consume_request_iterator(request_iterator, state, call,
+                                  self._request_serializer, event_handler)
+        return _MultiThreadedRendezvous(state, call,
+                                        self._response_deserializer, deadline)
+
+
+class _InitialMetadataFlags(int):
+    """Stores immutable initial metadata flags"""
+
+    def __new__(cls, value=_EMPTY_FLAGS):
+        value &= cygrpc.InitialMetadataFlags.used_mask
+        return super(_InitialMetadataFlags, cls).__new__(cls, value)
+
+    def with_wait_for_ready(self, wait_for_ready):
+        if wait_for_ready is not None:
+            if wait_for_ready:
+                return self.__class__(self | cygrpc.InitialMetadataFlags.wait_for_ready | \
+                    cygrpc.InitialMetadataFlags.wait_for_ready_explicitly_set)
+            elif not wait_for_ready:
+                return self.__class__(self & ~cygrpc.InitialMetadataFlags.wait_for_ready | \
+                    cygrpc.InitialMetadataFlags.wait_for_ready_explicitly_set)
+        return self
+
+
+class _ChannelCallState(object):
+
+    def __init__(self, channel):
+        self.lock = threading.Lock()
+        self.channel = channel
+        self.managed_calls = 0
+        self.threading = False
+
+    def reset_postfork_child(self):
+        self.managed_calls = 0
+
+    def __del__(self):
+        try:
+            self.channel.close(cygrpc.StatusCode.cancelled,
+                               'Channel deallocated!')
+        except (TypeError, AttributeError):
+            pass
+
+
+def _run_channel_spin_thread(state):
+
+    def channel_spin():
+        while True:
+            cygrpc.block_if_fork_in_progress(state)
+            event = state.channel.next_call_event()
+            if event.completion_type == cygrpc.CompletionType.queue_timeout:
+                continue
+            call_completed = event.tag(event)
+            if call_completed:
+                with state.lock:
+                    state.managed_calls -= 1
+                    if state.managed_calls == 0:
+                        return
+
+    channel_spin_thread = cygrpc.ForkManagedThread(target=channel_spin)
+    channel_spin_thread.setDaemon(True)
+    channel_spin_thread.start()
+
+
+def _channel_managed_call_management(state):
+
+    # pylint: disable=too-many-arguments
+    def create(flags, method, host, deadline, metadata, credentials,
+               operationses, event_handler, context):
+        """Creates a cygrpc.IntegratedCall.
+
+        Args:
+          flags: An integer bitfield of call flags.
+          method: The RPC method.
+          host: A host string for the created call.
+          deadline: A float to be the deadline of the created call or None if
+            the call is to have an infinite deadline.
+          metadata: The metadata for the call or None.
+          credentials: A cygrpc.CallCredentials or None.
+          operationses: An iterable of iterables of cygrpc.Operations to be
+            started on the call.
+          event_handler: A behavior to call to handle the events resultant from
+            the operations on the call.
+          context: Context object for distributed tracing.
+        Returns:
+          A cygrpc.IntegratedCall with which to conduct an RPC.
+        """
+        operationses_and_tags = tuple((
+            operations,
+            event_handler,
+        ) for operations in operationses)
+        with state.lock:
+            call = state.channel.integrated_call(flags, method, host, deadline,
+                                                 metadata, credentials,
+                                                 operationses_and_tags, context)
+            if state.managed_calls == 0:
+                state.managed_calls = 1
+                _run_channel_spin_thread(state)
+            else:
+                state.managed_calls += 1
+            return call
+
+    return create
+
+
+class _ChannelConnectivityState(object):
+
+    def __init__(self, channel):
+        self.lock = threading.RLock()
+        self.channel = channel
+        self.polling = False
+        self.connectivity = None
+        self.try_to_connect = False
+        self.callbacks_and_connectivities = []
+        self.delivering = False
+
+    def reset_postfork_child(self):
+        self.polling = False
+        self.connectivity = None
+        self.try_to_connect = False
+        self.callbacks_and_connectivities = []
+        self.delivering = False
+
+
+def _deliveries(state):
+    callbacks_needing_update = []
+    for callback_and_connectivity in state.callbacks_and_connectivities:
+        callback, callback_connectivity, = callback_and_connectivity
+        if callback_connectivity is not state.connectivity:
+            callbacks_needing_update.append(callback)
+            callback_and_connectivity[1] = state.connectivity
+    return callbacks_needing_update
+
+
+def _deliver(state, initial_connectivity, initial_callbacks):
+    connectivity = initial_connectivity
+    callbacks = initial_callbacks
+    while True:
+        for callback in callbacks:
+            cygrpc.block_if_fork_in_progress(state)
+            try:
+                callback(connectivity)
+            except Exception:  # pylint: disable=broad-except
+                _LOGGER.exception(
+                    _CHANNEL_SUBSCRIPTION_CALLBACK_ERROR_LOG_MESSAGE)
+        with state.lock:
+            callbacks = _deliveries(state)
+            if callbacks:
+                connectivity = state.connectivity
+            else:
+                state.delivering = False
+                return
+
+
+def _spawn_delivery(state, callbacks):
+    delivering_thread = cygrpc.ForkManagedThread(target=_deliver,
+                                                 args=(
+                                                     state,
+                                                     state.connectivity,
+                                                     callbacks,
+                                                 ))
+    delivering_thread.setDaemon(True)
+    delivering_thread.start()
+    state.delivering = True
+
+
+# NOTE(https://github.com/grpc/grpc/issues/3064): We'd rather not poll.
+def _poll_connectivity(state, channel, initial_try_to_connect):
+    try_to_connect = initial_try_to_connect
+    connectivity = channel.check_connectivity_state(try_to_connect)
+    with state.lock:
+        state.connectivity = (
+            _common.
+            CYGRPC_CONNECTIVITY_STATE_TO_CHANNEL_CONNECTIVITY[connectivity])
+        callbacks = tuple(
+            callback for callback, unused_but_known_to_be_none_connectivity in
+            state.callbacks_and_connectivities)
+        for callback_and_connectivity in state.callbacks_and_connectivities:
+            callback_and_connectivity[1] = state.connectivity
+        if callbacks:
+            _spawn_delivery(state, callbacks)
+    while True:
+        event = channel.watch_connectivity_state(connectivity,
+                                                 time.time() + 0.2)
+        cygrpc.block_if_fork_in_progress(state)
+        with state.lock:
+            if not state.callbacks_and_connectivities and not state.try_to_connect:
+                state.polling = False
+                state.connectivity = None
+                break
+            try_to_connect = state.try_to_connect
+            state.try_to_connect = False
+        if event.success or try_to_connect:
+            connectivity = channel.check_connectivity_state(try_to_connect)
+            with state.lock:
+                state.connectivity = (
+                    _common.CYGRPC_CONNECTIVITY_STATE_TO_CHANNEL_CONNECTIVITY[
+                        connectivity])
+                if not state.delivering:
+                    callbacks = _deliveries(state)
+                    if callbacks:
+                        _spawn_delivery(state, callbacks)
+
+
+def _subscribe(state, callback, try_to_connect):
+    with state.lock:
+        if not state.callbacks_and_connectivities and not state.polling:
+            polling_thread = cygrpc.ForkManagedThread(
+                target=_poll_connectivity,
+                args=(state, state.channel, bool(try_to_connect)))
+            polling_thread.setDaemon(True)
+            polling_thread.start()
+            state.polling = True
+            state.callbacks_and_connectivities.append([callback, None])
+        elif not state.delivering and state.connectivity is not None:
+            _spawn_delivery(state, (callback,))
+            state.try_to_connect |= bool(try_to_connect)
+            state.callbacks_and_connectivities.append(
+                [callback, state.connectivity])
+        else:
+            state.try_to_connect |= bool(try_to_connect)
+            state.callbacks_and_connectivities.append([callback, None])
+
+
+def _unsubscribe(state, callback):
+    with state.lock:
+        for index, (subscribed_callback, unused_connectivity) in enumerate(
+                state.callbacks_and_connectivities):
+            if callback == subscribed_callback:
+                state.callbacks_and_connectivities.pop(index)
+                break
+
+
+def _augment_options(base_options, compression):
+    compression_option = _compression.create_channel_option(compression)
+    return tuple(base_options) + compression_option + ((
+        cygrpc.ChannelArgKey.primary_user_agent_string,
+        _USER_AGENT,
+    ),)
+
+
+def _separate_channel_options(options):
+    """Separates core channel options from Python channel options."""
+    core_options = []
+    python_options = []
+    for pair in options:
+        if pair[0] == grpc.experimental.ChannelOptions.SingleThreadedUnaryStream:
+            python_options.append(pair)
+        else:
+            core_options.append(pair)
+    return python_options, core_options
+
+
+class Channel(grpc.Channel):
+    """A cygrpc.Channel-backed implementation of grpc.Channel."""
+
+    def __init__(self, target, options, credentials, compression):
+        """Constructor.
+
+        Args:
+          target: The target to which to connect.
+          options: Configuration options for the channel.
+          credentials: A cygrpc.ChannelCredentials or None.
+          compression: An optional value indicating the compression method to be
+            used over the lifetime of the channel.
+        """
+        python_options, core_options = _separate_channel_options(options)
+        self._single_threaded_unary_stream = _DEFAULT_SINGLE_THREADED_UNARY_STREAM
+        self._process_python_options(python_options)
+        self._channel = cygrpc.Channel(
+            _common.encode(target), _augment_options(core_options, compression),
+            credentials)
+        self._call_state = _ChannelCallState(self._channel)
+        self._connectivity_state = _ChannelConnectivityState(self._channel)
+        cygrpc.fork_register_channel(self)
+        if cygrpc.g_gevent_activated:
+            cygrpc.gevent_increment_channel_count()
+
+    def _process_python_options(self, python_options):
+        """Sets channel attributes according to python-only channel options."""
+        for pair in python_options:
+            if pair[0] == grpc.experimental.ChannelOptions.SingleThreadedUnaryStream:
+                self._single_threaded_unary_stream = True
+
+    def subscribe(self, callback, try_to_connect=None):
+        _subscribe(self._connectivity_state, callback, try_to_connect)
+
+    def unsubscribe(self, callback):
+        _unsubscribe(self._connectivity_state, callback)
+
+    def unary_unary(self,
+                    method,
+                    request_serializer=None,
+                    response_deserializer=None):
+        return _UnaryUnaryMultiCallable(
+            self._channel, _channel_managed_call_management(self._call_state),
+            _common.encode(method), request_serializer, response_deserializer)
+
+    def unary_stream(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
+        # NOTE(rbellevi): Benchmarks have shown that running a unary-stream RPC
+        # on a single Python thread results in an appreciable speed-up. However,
+        # due to slight differences in capability, the multi-threaded variant
+        # remains the default.
+        if self._single_threaded_unary_stream:
+            return _SingleThreadedUnaryStreamMultiCallable(
+                self._channel, _common.encode(method), request_serializer,
+                response_deserializer)
+        else:
+            return _UnaryStreamMultiCallable(
+                self._channel,
+                _channel_managed_call_management(self._call_state),
+                _common.encode(method), request_serializer,
+                response_deserializer)
+
+    def stream_unary(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
+        return _StreamUnaryMultiCallable(
+            self._channel, _channel_managed_call_management(self._call_state),
+            _common.encode(method), request_serializer, response_deserializer)
+
+    def stream_stream(self,
+                      method,
+                      request_serializer=None,
+                      response_deserializer=None):
+        return _StreamStreamMultiCallable(
+            self._channel, _channel_managed_call_management(self._call_state),
+            _common.encode(method), request_serializer, response_deserializer)
+
+    def _unsubscribe_all(self):
+        state = self._connectivity_state
+        if state:
+            with state.lock:
+                del state.callbacks_and_connectivities[:]
+
+    def _close(self):
+        self._unsubscribe_all()
+        self._channel.close(cygrpc.StatusCode.cancelled, 'Channel closed!')
+        cygrpc.fork_unregister_channel(self)
+        if cygrpc.g_gevent_activated:
+            cygrpc.gevent_decrement_channel_count()
+
+    def _close_on_fork(self):
+        self._unsubscribe_all()
+        self._channel.close_on_fork(cygrpc.StatusCode.cancelled,
+                                    'Channel closed due to fork')
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self._close()
+        return False
+
+    def close(self):
+        self._close()
+
+    def __del__(self):
+        # TODO(https://github.com/grpc/grpc/issues/12531): Several releases
+        # after 1.12 (1.16 or thereabouts?) add a "self._channel.close" call
+        # here (or more likely, call self._close() here). We don't do this today
+        # because many valid use cases today allow the channel to be deleted
+        # immediately after stubs are created. After a sufficient period of time
+        # has passed for all users to be trusted to freeze out to their channels
+        # for as long as they are in use and to close them after using them,
+        # then deletion of this grpc._channel.Channel instance can be made to
+        # effect closure of the underlying cygrpc.Channel instance.
+        try:
+            self._unsubscribe_all()
+        except:  # pylint: disable=bare-except
+            # Exceptions in __del__ are ignored by Python anyway, but they can
+            # keep spamming logs.  Just silence them.
+            pass

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/_common.py

@@ -0,0 +1,168 @@
+# Copyright 2016 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Shared implementation."""
+
+import logging
+import time
+
+import grpc
+from grpc._cython import cygrpc
+import six
+
+_LOGGER = logging.getLogger(__name__)
+
+CYGRPC_CONNECTIVITY_STATE_TO_CHANNEL_CONNECTIVITY = {
+    cygrpc.ConnectivityState.idle:
+        grpc.ChannelConnectivity.IDLE,
+    cygrpc.ConnectivityState.connecting:
+        grpc.ChannelConnectivity.CONNECTING,
+    cygrpc.ConnectivityState.ready:
+        grpc.ChannelConnectivity.READY,
+    cygrpc.ConnectivityState.transient_failure:
+        grpc.ChannelConnectivity.TRANSIENT_FAILURE,
+    cygrpc.ConnectivityState.shutdown:
+        grpc.ChannelConnectivity.SHUTDOWN,
+}
+
+CYGRPC_STATUS_CODE_TO_STATUS_CODE = {
+    cygrpc.StatusCode.ok: grpc.StatusCode.OK,
+    cygrpc.StatusCode.cancelled: grpc.StatusCode.CANCELLED,
+    cygrpc.StatusCode.unknown: grpc.StatusCode.UNKNOWN,
+    cygrpc.StatusCode.invalid_argument: grpc.StatusCode.INVALID_ARGUMENT,
+    cygrpc.StatusCode.deadline_exceeded: grpc.StatusCode.DEADLINE_EXCEEDED,
+    cygrpc.StatusCode.not_found: grpc.StatusCode.NOT_FOUND,
+    cygrpc.StatusCode.already_exists: grpc.StatusCode.ALREADY_EXISTS,
+    cygrpc.StatusCode.permission_denied: grpc.StatusCode.PERMISSION_DENIED,
+    cygrpc.StatusCode.unauthenticated: grpc.StatusCode.UNAUTHENTICATED,
+    cygrpc.StatusCode.resource_exhausted: grpc.StatusCode.RESOURCE_EXHAUSTED,
+    cygrpc.StatusCode.failed_precondition: grpc.StatusCode.FAILED_PRECONDITION,
+    cygrpc.StatusCode.aborted: grpc.StatusCode.ABORTED,
+    cygrpc.StatusCode.out_of_range: grpc.StatusCode.OUT_OF_RANGE,
+    cygrpc.StatusCode.unimplemented: grpc.StatusCode.UNIMPLEMENTED,
+    cygrpc.StatusCode.internal: grpc.StatusCode.INTERNAL,
+    cygrpc.StatusCode.unavailable: grpc.StatusCode.UNAVAILABLE,
+    cygrpc.StatusCode.data_loss: grpc.StatusCode.DATA_LOSS,
+}
+STATUS_CODE_TO_CYGRPC_STATUS_CODE = {
+    grpc_code: cygrpc_code for cygrpc_code, grpc_code in six.iteritems(
+        CYGRPC_STATUS_CODE_TO_STATUS_CODE)
+}
+
+MAXIMUM_WAIT_TIMEOUT = 0.1
+
+_ERROR_MESSAGE_PORT_BINDING_FAILED = 'Failed to bind to address %s; set ' \
+    'GRPC_VERBOSITY=debug environment variable to see detailed error message.'
+
+
+def encode(s):
+    if isinstance(s, bytes):
+        return s
+    else:
+        return s.encode('utf8')
+
+
+def decode(b):
+    if isinstance(b, bytes):
+        return b.decode('utf-8', 'replace')
+    return b
+
+
+def _transform(message, transformer, exception_message):
+    if transformer is None:
+        return message
+    else:
+        try:
+            return transformer(message)
+        except Exception:  # pylint: disable=broad-except
+            _LOGGER.exception(exception_message)
+            return None
+
+
+def serialize(message, serializer):
+    return _transform(message, serializer, 'Exception serializing message!')
+
+
+def deserialize(serialized_message, deserializer):
+    return _transform(serialized_message, deserializer,
+                      'Exception deserializing message!')
+
+
+def fully_qualified_method(group, method):
+    return '/{}/{}'.format(group, method)
+
+
+def _wait_once(wait_fn, timeout, spin_cb):
+    wait_fn(timeout=timeout)
+    if spin_cb is not None:
+        spin_cb()
+
+
+def wait(wait_fn, wait_complete_fn, timeout=None, spin_cb=None):
+    """Blocks waiting for an event without blocking the thread indefinitely.
+
+    See https://github.com/grpc/grpc/issues/19464 for full context. CPython's
+    `threading.Event.wait` and `threading.Condition.wait` methods, if invoked
+    without a timeout kwarg, may block the calling thread indefinitely. If the
+    call is made from the main thread, this means that signal handlers may not
+    run for an arbitrarily long period of time.
+
+    This wrapper calls the supplied wait function with an arbitrary short
+    timeout to ensure that no signal handler has to wait longer than
+    MAXIMUM_WAIT_TIMEOUT before executing.
+
+    Args:
+      wait_fn: A callable acceptable a single float-valued kwarg named
+        `timeout`. This function is expected to be one of `threading.Event.wait`
+        or `threading.Condition.wait`.
+      wait_complete_fn: A callable taking no arguments and returning a bool.
+        When this function returns true, it indicates that waiting should cease.
+      timeout: An optional float-valued number of seconds after which the wait
+        should cease.
+      spin_cb: An optional Callable taking no arguments and returning nothing.
+        This callback will be called on each iteration of the spin. This may be
+        used for, e.g. work related to forking.
+
+    Returns:
+      True if a timeout was supplied and it was reached. False otherwise.
+    """
+    if timeout is None:
+        while not wait_complete_fn():
+            _wait_once(wait_fn, MAXIMUM_WAIT_TIMEOUT, spin_cb)
+    else:
+        end = time.time() + timeout
+        while not wait_complete_fn():
+            remaining = min(end - time.time(), MAXIMUM_WAIT_TIMEOUT)
+            if remaining < 0:
+                return True
+            _wait_once(wait_fn, remaining, spin_cb)
+    return False
+
+
+def validate_port_binding_result(address, port):
+    """Validates if the port binding succeed.
+
+    If the port returned by Core is 0, the binding is failed. However, in that
+    case, the Core API doesn't return a detailed failing reason. The best we
+    can do is raising an exception to prevent further confusion.
+
+    Args:
+        address: The address string to be bound.
+        port: An int returned by core
+    """
+    if port == 0:
+        # The Core API doesn't return a failure message. The best we can do
+        # is raising an exception to prevent further confusion.
+        raise RuntimeError(_ERROR_MESSAGE_PORT_BINDING_FAILED % address)
+    else:
+        return port

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/_compression.py

@@ -0,0 +1,55 @@
+# Copyright 2019 The gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from grpc._cython import cygrpc
+
+NoCompression = cygrpc.CompressionAlgorithm.none
+Deflate = cygrpc.CompressionAlgorithm.deflate
+Gzip = cygrpc.CompressionAlgorithm.gzip
+
+_METADATA_STRING_MAPPING = {
+    NoCompression: 'identity',
+    Deflate: 'deflate',
+    Gzip: 'gzip',
+}
+
+
+def _compression_algorithm_to_metadata_value(compression):
+    return _METADATA_STRING_MAPPING[compression]
+
+
+def compression_algorithm_to_metadata(compression):
+    return (cygrpc.GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY,
+            _compression_algorithm_to_metadata_value(compression))
+
+
+def create_channel_option(compression):
+    return ((cygrpc.GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM,
+             int(compression)),) if compression else ()
+
+
+def augment_metadata(metadata, compression):
+    if not metadata and not compression:
+        return None
+    base_metadata = tuple(metadata) if metadata else ()
+    compression_metadata = (
+        compression_algorithm_to_metadata(compression),) if compression else ()
+    return base_metadata + compression_metadata
+
+
+__all__ = (
+    "NoCompression",
+    "Deflate",
+    "Gzip",
+)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/_grpcio_metadata.py

@@ -0,0 +1 @@
+__version__ = """1.47.0"""

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/_interceptor.py

@@ -0,0 +1,562 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Implementation of gRPC Python interceptors."""
+
+import collections
+import sys
+
+import grpc
+
+
+class _ServicePipeline(object):
+
+    def __init__(self, interceptors):
+        self.interceptors = tuple(interceptors)
+
+    def _continuation(self, thunk, index):
+        return lambda context: self._intercept_at(thunk, index, context)
+
+    def _intercept_at(self, thunk, index, context):
+        if index < len(self.interceptors):
+            interceptor = self.interceptors[index]
+            thunk = self._continuation(thunk, index + 1)
+            return interceptor.intercept_service(thunk, context)
+        else:
+            return thunk(context)
+
+    def execute(self, thunk, context):
+        return self._intercept_at(thunk, 0, context)
+
+
+def service_pipeline(interceptors):
+    return _ServicePipeline(interceptors) if interceptors else None
+
+
+class _ClientCallDetails(
+        collections.namedtuple('_ClientCallDetails',
+                               ('method', 'timeout', 'metadata', 'credentials',
+                                'wait_for_ready', 'compression')),
+        grpc.ClientCallDetails):
+    pass
+
+
+def _unwrap_client_call_details(call_details, default_details):
+    try:
+        method = call_details.method
+    except AttributeError:
+        method = default_details.method
+
+    try:
+        timeout = call_details.timeout
+    except AttributeError:
+        timeout = default_details.timeout
+
+    try:
+        metadata = call_details.metadata
+    except AttributeError:
+        metadata = default_details.metadata
+
+    try:
+        credentials = call_details.credentials
+    except AttributeError:
+        credentials = default_details.credentials
+
+    try:
+        wait_for_ready = call_details.wait_for_ready
+    except AttributeError:
+        wait_for_ready = default_details.wait_for_ready
+
+    try:
+        compression = call_details.compression
+    except AttributeError:
+        compression = default_details.compression
+
+    return method, timeout, metadata, credentials, wait_for_ready, compression
+
+
+class _FailureOutcome(grpc.RpcError, grpc.Future, grpc.Call):  # pylint: disable=too-many-ancestors
+
+    def __init__(self, exception, traceback):
+        super(_FailureOutcome, self).__init__()
+        self._exception = exception
+        self._traceback = traceback
+
+    def initial_metadata(self):
+        return None
+
+    def trailing_metadata(self):
+        return None
+
+    def code(self):
+        return grpc.StatusCode.INTERNAL
+
+    def details(self):
+        return 'Exception raised while intercepting the RPC'
+
+    def cancel(self):
+        return False
+
+    def cancelled(self):
+        return False
+
+    def is_active(self):
+        return False
+
+    def time_remaining(self):
+        return None
+
+    def running(self):
+        return False
+
+    def done(self):
+        return True
+
+    def result(self, ignored_timeout=None):
+        raise self._exception
+
+    def exception(self, ignored_timeout=None):
+        return self._exception
+
+    def traceback(self, ignored_timeout=None):
+        return self._traceback
+
+    def add_callback(self, unused_callback):
+        return False
+
+    def add_done_callback(self, fn):
+        fn(self)
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        raise self._exception
+
+    def next(self):
+        return self.__next__()
+
+
+class _UnaryOutcome(grpc.Call, grpc.Future):
+
+    def __init__(self, response, call):
+        self._response = response
+        self._call = call
+
+    def initial_metadata(self):
+        return self._call.initial_metadata()
+
+    def trailing_metadata(self):
+        return self._call.trailing_metadata()
+
+    def code(self):
+        return self._call.code()
+
+    def details(self):
+        return self._call.details()
+
+    def is_active(self):
+        return self._call.is_active()
+
+    def time_remaining(self):
+        return self._call.time_remaining()
+
+    def cancel(self):
+        return self._call.cancel()
+
+    def add_callback(self, callback):
+        return self._call.add_callback(callback)
+
+    def cancelled(self):
+        return False
+
+    def running(self):
+        return False
+
+    def done(self):
+        return True
+
+    def result(self, ignored_timeout=None):
+        return self._response
+
+    def exception(self, ignored_timeout=None):
+        return None
+
+    def traceback(self, ignored_timeout=None):
+        return None
+
+    def add_done_callback(self, fn):
+        fn(self)
+
+
+class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
+
+    def __init__(self, thunk, method, interceptor):
+        self._thunk = thunk
+        self._method = method
+        self._interceptor = interceptor
+
+    def __call__(self,
+                 request,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        response, ignored_call = self._with_call(request,
+                                                 timeout=timeout,
+                                                 metadata=metadata,
+                                                 credentials=credentials,
+                                                 wait_for_ready=wait_for_ready,
+                                                 compression=compression)
+        return response
+
+    def _with_call(self,
+                   request,
+                   timeout=None,
+                   metadata=None,
+                   credentials=None,
+                   wait_for_ready=None,
+                   compression=None):
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials,
+                                                 wait_for_ready, compression)
+
+        def continuation(new_details, request):
+            (new_method, new_timeout, new_metadata, new_credentials,
+             new_wait_for_ready,
+             new_compression) = (_unwrap_client_call_details(
+                 new_details, client_call_details))
+            try:
+                response, call = self._thunk(new_method).with_call(
+                    request,
+                    timeout=new_timeout,
+                    metadata=new_metadata,
+                    credentials=new_credentials,
+                    wait_for_ready=new_wait_for_ready,
+                    compression=new_compression)
+                return _UnaryOutcome(response, call)
+            except grpc.RpcError as rpc_error:
+                return rpc_error
+            except Exception as exception:  # pylint:disable=broad-except
+                return _FailureOutcome(exception, sys.exc_info()[2])
+
+        call = self._interceptor.intercept_unary_unary(continuation,
+                                                       client_call_details,
+                                                       request)
+        return call.result(), call
+
+    def with_call(self,
+                  request,
+                  timeout=None,
+                  metadata=None,
+                  credentials=None,
+                  wait_for_ready=None,
+                  compression=None):
+        return self._with_call(request,
+                               timeout=timeout,
+                               metadata=metadata,
+                               credentials=credentials,
+                               wait_for_ready=wait_for_ready,
+                               compression=compression)
+
+    def future(self,
+               request,
+               timeout=None,
+               metadata=None,
+               credentials=None,
+               wait_for_ready=None,
+               compression=None):
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials,
+                                                 wait_for_ready, compression)
+
+        def continuation(new_details, request):
+            (new_method, new_timeout, new_metadata, new_credentials,
+             new_wait_for_ready,
+             new_compression) = (_unwrap_client_call_details(
+                 new_details, client_call_details))
+            return self._thunk(new_method).future(
+                request,
+                timeout=new_timeout,
+                metadata=new_metadata,
+                credentials=new_credentials,
+                wait_for_ready=new_wait_for_ready,
+                compression=new_compression)
+
+        try:
+            return self._interceptor.intercept_unary_unary(
+                continuation, client_call_details, request)
+        except Exception as exception:  # pylint:disable=broad-except
+            return _FailureOutcome(exception, sys.exc_info()[2])
+
+
+class _UnaryStreamMultiCallable(grpc.UnaryStreamMultiCallable):
+
+    def __init__(self, thunk, method, interceptor):
+        self._thunk = thunk
+        self._method = method
+        self._interceptor = interceptor
+
+    def __call__(self,
+                 request,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials,
+                                                 wait_for_ready, compression)
+
+        def continuation(new_details, request):
+            (new_method, new_timeout, new_metadata, new_credentials,
+             new_wait_for_ready,
+             new_compression) = (_unwrap_client_call_details(
+                 new_details, client_call_details))
+            return self._thunk(new_method)(request,
+                                           timeout=new_timeout,
+                                           metadata=new_metadata,
+                                           credentials=new_credentials,
+                                           wait_for_ready=new_wait_for_ready,
+                                           compression=new_compression)
+
+        try:
+            return self._interceptor.intercept_unary_stream(
+                continuation, client_call_details, request)
+        except Exception as exception:  # pylint:disable=broad-except
+            return _FailureOutcome(exception, sys.exc_info()[2])
+
+
+class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
+
+    def __init__(self, thunk, method, interceptor):
+        self._thunk = thunk
+        self._method = method
+        self._interceptor = interceptor
+
+    def __call__(self,
+                 request_iterator,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        response, ignored_call = self._with_call(request_iterator,
+                                                 timeout=timeout,
+                                                 metadata=metadata,
+                                                 credentials=credentials,
+                                                 wait_for_ready=wait_for_ready,
+                                                 compression=compression)
+        return response
+
+    def _with_call(self,
+                   request_iterator,
+                   timeout=None,
+                   metadata=None,
+                   credentials=None,
+                   wait_for_ready=None,
+                   compression=None):
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials,
+                                                 wait_for_ready, compression)
+
+        def continuation(new_details, request_iterator):
+            (new_method, new_timeout, new_metadata, new_credentials,
+             new_wait_for_ready,
+             new_compression) = (_unwrap_client_call_details(
+                 new_details, client_call_details))
+            try:
+                response, call = self._thunk(new_method).with_call(
+                    request_iterator,
+                    timeout=new_timeout,
+                    metadata=new_metadata,
+                    credentials=new_credentials,
+                    wait_for_ready=new_wait_for_ready,
+                    compression=new_compression)
+                return _UnaryOutcome(response, call)
+            except grpc.RpcError as rpc_error:
+                return rpc_error
+            except Exception as exception:  # pylint:disable=broad-except
+                return _FailureOutcome(exception, sys.exc_info()[2])
+
+        call = self._interceptor.intercept_stream_unary(continuation,
+                                                        client_call_details,
+                                                        request_iterator)
+        return call.result(), call
+
+    def with_call(self,
+                  request_iterator,
+                  timeout=None,
+                  metadata=None,
+                  credentials=None,
+                  wait_for_ready=None,
+                  compression=None):
+        return self._with_call(request_iterator,
+                               timeout=timeout,
+                               metadata=metadata,
+                               credentials=credentials,
+                               wait_for_ready=wait_for_ready,
+                               compression=compression)
+
+    def future(self,
+               request_iterator,
+               timeout=None,
+               metadata=None,
+               credentials=None,
+               wait_for_ready=None,
+               compression=None):
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials,
+                                                 wait_for_ready, compression)
+
+        def continuation(new_details, request_iterator):
+            (new_method, new_timeout, new_metadata, new_credentials,
+             new_wait_for_ready,
+             new_compression) = (_unwrap_client_call_details(
+                 new_details, client_call_details))
+            return self._thunk(new_method).future(
+                request_iterator,
+                timeout=new_timeout,
+                metadata=new_metadata,
+                credentials=new_credentials,
+                wait_for_ready=new_wait_for_ready,
+                compression=new_compression)
+
+        try:
+            return self._interceptor.intercept_stream_unary(
+                continuation, client_call_details, request_iterator)
+        except Exception as exception:  # pylint:disable=broad-except
+            return _FailureOutcome(exception, sys.exc_info()[2])
+
+
+class _StreamStreamMultiCallable(grpc.StreamStreamMultiCallable):
+
+    def __init__(self, thunk, method, interceptor):
+        self._thunk = thunk
+        self._method = method
+        self._interceptor = interceptor
+
+    def __call__(self,
+                 request_iterator,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None,
+                 wait_for_ready=None,
+                 compression=None):
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials,
+                                                 wait_for_ready, compression)
+
+        def continuation(new_details, request_iterator):
+            (new_method, new_timeout, new_metadata, new_credentials,
+             new_wait_for_ready,
+             new_compression) = (_unwrap_client_call_details(
+                 new_details, client_call_details))
+            return self._thunk(new_method)(request_iterator,
+                                           timeout=new_timeout,
+                                           metadata=new_metadata,
+                                           credentials=new_credentials,
+                                           wait_for_ready=new_wait_for_ready,
+                                           compression=new_compression)
+
+        try:
+            return self._interceptor.intercept_stream_stream(
+                continuation, client_call_details, request_iterator)
+        except Exception as exception:  # pylint:disable=broad-except
+            return _FailureOutcome(exception, sys.exc_info()[2])
+
+
+class _Channel(grpc.Channel):
+
+    def __init__(self, channel, interceptor):
+        self._channel = channel
+        self._interceptor = interceptor
+
+    def subscribe(self, callback, try_to_connect=False):
+        self._channel.subscribe(callback, try_to_connect=try_to_connect)
+
+    def unsubscribe(self, callback):
+        self._channel.unsubscribe(callback)
+
+    def unary_unary(self,
+                    method,
+                    request_serializer=None,
+                    response_deserializer=None):
+        thunk = lambda m: self._channel.unary_unary(m, request_serializer,
+                                                    response_deserializer)
+        if isinstance(self._interceptor, grpc.UnaryUnaryClientInterceptor):
+            return _UnaryUnaryMultiCallable(thunk, method, self._interceptor)
+        else:
+            return thunk(method)
+
+    def unary_stream(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
+        thunk = lambda m: self._channel.unary_stream(m, request_serializer,
+                                                     response_deserializer)
+        if isinstance(self._interceptor, grpc.UnaryStreamClientInterceptor):
+            return _UnaryStreamMultiCallable(thunk, method, self._interceptor)
+        else:
+            return thunk(method)
+
+    def stream_unary(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
+        thunk = lambda m: self._channel.stream_unary(m, request_serializer,
+                                                     response_deserializer)
+        if isinstance(self._interceptor, grpc.StreamUnaryClientInterceptor):
+            return _StreamUnaryMultiCallable(thunk, method, self._interceptor)
+        else:
+            return thunk(method)
+
+    def stream_stream(self,
+                      method,
+                      request_serializer=None,
+                      response_deserializer=None):
+        thunk = lambda m: self._channel.stream_stream(m, request_serializer,
+                                                      response_deserializer)
+        if isinstance(self._interceptor, grpc.StreamStreamClientInterceptor):
+            return _StreamStreamMultiCallable(thunk, method, self._interceptor)
+        else:
+            return thunk(method)
+
+    def _close(self):
+        self._channel.close()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self._close()
+        return False
+
+    def close(self):
+        self._channel.close()
+
+
+def intercept_channel(channel, *interceptors):
+    for interceptor in reversed(list(interceptors)):
+        if not isinstance(interceptor, grpc.UnaryUnaryClientInterceptor) and \
+           not isinstance(interceptor, grpc.UnaryStreamClientInterceptor) and \
+           not isinstance(interceptor, grpc.StreamUnaryClientInterceptor) and \
+           not isinstance(interceptor, grpc.StreamStreamClientInterceptor):
+            raise TypeError('interceptor must be '
+                            'grpc.UnaryUnaryClientInterceptor or '
+                            'grpc.UnaryStreamClientInterceptor or '
+                            'grpc.StreamUnaryClientInterceptor or '
+                            'grpc.StreamStreamClientInterceptor or ')
+        channel = _Channel(channel, interceptor)
+    return channel

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/_plugin_wrapping.py

@@ -0,0 +1,113 @@
+# Copyright 2015 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import collections
+import logging
+import threading
+
+import grpc
+from grpc import _common
+from grpc._cython import cygrpc
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class _AuthMetadataContext(
+        collections.namedtuple('AuthMetadataContext', (
+            'service_url',
+            'method_name',
+        )), grpc.AuthMetadataContext):
+    pass
+
+
+class _CallbackState(object):
+
+    def __init__(self):
+        self.lock = threading.Lock()
+        self.called = False
+        self.exception = None
+
+
+class _AuthMetadataPluginCallback(grpc.AuthMetadataPluginCallback):
+
+    def __init__(self, state, callback):
+        self._state = state
+        self._callback = callback
+
+    def __call__(self, metadata, error):
+        with self._state.lock:
+            if self._state.exception is None:
+                if self._state.called:
+                    raise RuntimeError(
+                        'AuthMetadataPluginCallback invoked more than once!')
+                else:
+                    self._state.called = True
+            else:
+                raise RuntimeError(
+                    'AuthMetadataPluginCallback raised exception "{}"!'.format(
+                        self._state.exception))
+        if error is None:
+            self._callback(metadata, cygrpc.StatusCode.ok, None)
+        else:
+            self._callback(None, cygrpc.StatusCode.internal,
+                           _common.encode(str(error)))
+
+
+class _Plugin(object):
+
+    def __init__(self, metadata_plugin):
+        self._metadata_plugin = metadata_plugin
+        self._stored_ctx = None
+
+        try:
+            import contextvars  # pylint: disable=wrong-import-position
+
+            # The plugin may be invoked on a thread created by Core, which will not
+            # have the context propagated. This context is stored and installed in
+            # the thread invoking the plugin.
+            self._stored_ctx = contextvars.copy_context()
+        except ImportError:
+            # Support versions predating contextvars.
+            pass
+
+    def __call__(self, service_url, method_name, callback):
+        context = _AuthMetadataContext(_common.decode(service_url),
+                                       _common.decode(method_name))
+        callback_state = _CallbackState()
+        try:
+            self._metadata_plugin(
+                context, _AuthMetadataPluginCallback(callback_state, callback))
+        except Exception as exception:  # pylint: disable=broad-except
+            _LOGGER.exception(
+                'AuthMetadataPluginCallback "%s" raised exception!',
+                self._metadata_plugin)
+            with callback_state.lock:
+                callback_state.exception = exception
+                if callback_state.called:
+                    return
+            callback(None, cygrpc.StatusCode.internal,
+                     _common.encode(str(exception)))
+
+
+def metadata_plugin_call_credentials(metadata_plugin, name):
+    if name is None:
+        try:
+            effective_name = metadata_plugin.__name__
+        except AttributeError:
+            effective_name = metadata_plugin.__class__.__name__
+    else:
+        effective_name = name
+    return grpc.CallCredentials(
+        cygrpc.MetadataPluginCallCredentials(_Plugin(metadata_plugin),
+                                             _common.encode(effective_name)))

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/_runtime_protos.py

@@ -0,0 +1,155 @@
+# Copyright 2020 The gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+
+_REQUIRED_SYMBOLS = ("_protos", "_services", "_protos_and_services")
+_MINIMUM_VERSION = (3, 5, 0)
+
+_UNINSTALLED_TEMPLATE = "Install the grpcio-tools package (1.32.0+) to use the {} function."
+_VERSION_ERROR_TEMPLATE = "The {} function is only on available on Python 3.X interpreters."
+
+
+def _has_runtime_proto_symbols(mod):
+    return all(hasattr(mod, sym) for sym in _REQUIRED_SYMBOLS)
+
+
+def _is_grpc_tools_importable():
+    try:
+        import grpc_tools  # pylint: disable=unused-import
+        return True
+    except ImportError as e:
+        # NOTE: It's possible that we're encountering a transitive ImportError, so
+        # we check for that and re-raise if so.
+        if "grpc_tools" not in e.args[0]:
+            raise
+        return False
+
+
+def _call_with_lazy_import(fn_name, protobuf_path):
+    """Calls one of the three functions, lazily importing grpc_tools.
+
+    Args:
+      fn_name: The name of the function to import from grpc_tools.protoc.
+      protobuf_path: The path to import.
+
+    Returns:
+      The appropriate module object.
+    """
+    if sys.version_info < _MINIMUM_VERSION:
+        raise NotImplementedError(_VERSION_ERROR_TEMPLATE.format(fn_name))
+    else:
+        if not _is_grpc_tools_importable():
+            raise NotImplementedError(_UNINSTALLED_TEMPLATE.format(fn_name))
+        import grpc_tools.protoc
+        if _has_runtime_proto_symbols(grpc_tools.protoc):
+            fn = getattr(grpc_tools.protoc, '_' + fn_name)
+            return fn(protobuf_path)
+        else:
+            raise NotImplementedError(_UNINSTALLED_TEMPLATE.format(fn_name))
+
+
+def protos(protobuf_path):  # pylint: disable=unused-argument
+    """Returns a module generated by the indicated .proto file.
+
+    THIS IS AN EXPERIMENTAL API.
+
+    Use this function to retrieve classes corresponding to message
+    definitions in the .proto file.
+
+    To inspect the contents of the returned module, use the dir function.
+    For example:
+
+    ```
+    protos = grpc.protos("foo.proto")
+    print(dir(protos))
+    ```
+
+    The returned module object corresponds to the _pb2.py file generated
+    by protoc. The path is expected to be relative to an entry on sys.path
+    and all transitive dependencies of the file should also be resolveable
+    from an entry on sys.path.
+
+    To completely disable the machinery behind this function, set the
+    GRPC_PYTHON_DISABLE_DYNAMIC_STUBS environment variable to "true".
+
+    Args:
+      protobuf_path: The path to the .proto file on the filesystem. This path
+        must be resolveable from an entry on sys.path and so must all of its
+        transitive dependencies.
+
+    Returns:
+      A module object corresponding to the message code for the indicated
+      .proto file. Equivalent to a generated _pb2.py file.
+    """
+    return _call_with_lazy_import("protos", protobuf_path)
+
+
+def services(protobuf_path):  # pylint: disable=unused-argument
+    """Returns a module generated by the indicated .proto file.
+
+    THIS IS AN EXPERIMENTAL API.
+
+    Use this function to retrieve classes and functions corresponding to
+    service definitions in the .proto file, including both stub and servicer
+    definitions.
+
+    To inspect the contents of the returned module, use the dir function.
+    For example:
+
+    ```
+    services = grpc.services("foo.proto")
+    print(dir(services))
+    ```
+
+    The returned module object corresponds to the _pb2_grpc.py file generated
+    by protoc. The path is expected to be relative to an entry on sys.path
+    and all transitive dependencies of the file should also be resolveable
+    from an entry on sys.path.
+
+    To completely disable the machinery behind this function, set the
+    GRPC_PYTHON_DISABLE_DYNAMIC_STUBS environment variable to "true".
+
+    Args:
+      protobuf_path: The path to the .proto file on the filesystem. This path
+        must be resolveable from an entry on sys.path and so must all of its
+        transitive dependencies.
+
+    Returns:
+      A module object corresponding to the stub/service code for the indicated
+      .proto file. Equivalent to a generated _pb2_grpc.py file.
+    """
+    return _call_with_lazy_import("services", protobuf_path)
+
+
+def protos_and_services(protobuf_path):  # pylint: disable=unused-argument
+    """Returns a 2-tuple of modules corresponding to protos and services.
+
+    THIS IS AN EXPERIMENTAL API.
+
+    The return value of this function is equivalent to a call to protos and a
+    call to services.
+
+    To completely disable the machinery behind this function, set the
+    GRPC_PYTHON_DISABLE_DYNAMIC_STUBS environment variable to "true".
+
+    Args:
+      protobuf_path: The path to the .proto file on the filesystem. This path
+        must be resolveable from an entry on sys.path and so must all of its
+        transitive dependencies.
+
+    Returns:
+      A 2-tuple of module objects corresponding to (protos(path), services(path)).
+    """
+    return _call_with_lazy_import("protos_and_services", protobuf_path)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/_server.py

@@ -0,0 +1,1003 @@
+# Copyright 2016 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Service-side implementation of gRPC Python."""
+
+import collections
+from concurrent import futures
+import enum
+import logging
+import threading
+import time
+
+import grpc
+from grpc import _common
+from grpc import _compression
+from grpc import _interceptor
+from grpc._cython import cygrpc
+import six
+
+_LOGGER = logging.getLogger(__name__)
+
+_SHUTDOWN_TAG = 'shutdown'
+_REQUEST_CALL_TAG = 'request_call'
+
+_RECEIVE_CLOSE_ON_SERVER_TOKEN = 'receive_close_on_server'
+_SEND_INITIAL_METADATA_TOKEN = 'send_initial_metadata'
+_RECEIVE_MESSAGE_TOKEN = 'receive_message'
+_SEND_MESSAGE_TOKEN = 'send_message'
+_SEND_INITIAL_METADATA_AND_SEND_MESSAGE_TOKEN = (
+    'send_initial_metadata * send_message')
+_SEND_STATUS_FROM_SERVER_TOKEN = 'send_status_from_server'
+_SEND_INITIAL_METADATA_AND_SEND_STATUS_FROM_SERVER_TOKEN = (
+    'send_initial_metadata * send_status_from_server')
+
+_OPEN = 'open'
+_CLOSED = 'closed'
+_CANCELLED = 'cancelled'
+
+_EMPTY_FLAGS = 0
+
+_DEALLOCATED_SERVER_CHECK_PERIOD_S = 1.0
+_INF_TIMEOUT = 1e9
+
+
+def _serialized_request(request_event):
+    return request_event.batch_operations[0].message()
+
+
+def _application_code(code):
+    cygrpc_code = _common.STATUS_CODE_TO_CYGRPC_STATUS_CODE.get(code)
+    return cygrpc.StatusCode.unknown if cygrpc_code is None else cygrpc_code
+
+
+def _completion_code(state):
+    if state.code is None:
+        return cygrpc.StatusCode.ok
+    else:
+        return _application_code(state.code)
+
+
+def _abortion_code(state, code):
+    if state.code is None:
+        return code
+    else:
+        return _application_code(state.code)
+
+
+def _details(state):
+    return b'' if state.details is None else state.details
+
+
+class _HandlerCallDetails(
+        collections.namedtuple('_HandlerCallDetails', (
+            'method',
+            'invocation_metadata',
+        )), grpc.HandlerCallDetails):
+    pass
+
+
+class _RPCState(object):
+
+    def __init__(self):
+        self.condition = threading.Condition()
+        self.due = set()
+        self.request = None
+        self.client = _OPEN
+        self.initial_metadata_allowed = True
+        self.compression_algorithm = None
+        self.disable_next_compression = False
+        self.trailing_metadata = None
+        self.code = None
+        self.details = None
+        self.statused = False
+        self.rpc_errors = []
+        self.callbacks = []
+        self.aborted = False
+
+
+def _raise_rpc_error(state):
+    rpc_error = grpc.RpcError()
+    state.rpc_errors.append(rpc_error)
+    raise rpc_error
+
+
+def _possibly_finish_call(state, token):
+    state.due.remove(token)
+    if not _is_rpc_state_active(state) and not state.due:
+        callbacks = state.callbacks
+        state.callbacks = None
+        return state, callbacks
+    else:
+        return None, ()
+
+
+def _send_status_from_server(state, token):
+
+    def send_status_from_server(unused_send_status_from_server_event):
+        with state.condition:
+            return _possibly_finish_call(state, token)
+
+    return send_status_from_server
+
+
+def _get_initial_metadata(state, metadata):
+    with state.condition:
+        if state.compression_algorithm:
+            compression_metadata = (
+                _compression.compression_algorithm_to_metadata(
+                    state.compression_algorithm),)
+            if metadata is None:
+                return compression_metadata
+            else:
+                return compression_metadata + tuple(metadata)
+        else:
+            return metadata
+
+
+def _get_initial_metadata_operation(state, metadata):
+    operation = cygrpc.SendInitialMetadataOperation(
+        _get_initial_metadata(state, metadata), _EMPTY_FLAGS)
+    return operation
+
+
+def _abort(state, call, code, details):
+    if state.client is not _CANCELLED:
+        effective_code = _abortion_code(state, code)
+        effective_details = details if state.details is None else state.details
+        if state.initial_metadata_allowed:
+            operations = (
+                _get_initial_metadata_operation(state, None),
+                cygrpc.SendStatusFromServerOperation(state.trailing_metadata,
+                                                     effective_code,
+                                                     effective_details,
+                                                     _EMPTY_FLAGS),
+            )
+            token = _SEND_INITIAL_METADATA_AND_SEND_STATUS_FROM_SERVER_TOKEN
+        else:
+            operations = (cygrpc.SendStatusFromServerOperation(
+                state.trailing_metadata, effective_code, effective_details,
+                _EMPTY_FLAGS),)
+            token = _SEND_STATUS_FROM_SERVER_TOKEN
+        call.start_server_batch(operations,
+                                _send_status_from_server(state, token))
+        state.statused = True
+        state.due.add(token)
+
+
+def _receive_close_on_server(state):
+
+    def receive_close_on_server(receive_close_on_server_event):
+        with state.condition:
+            if receive_close_on_server_event.batch_operations[0].cancelled():
+                state.client = _CANCELLED
+            elif state.client is _OPEN:
+                state.client = _CLOSED
+            state.condition.notify_all()
+            return _possibly_finish_call(state, _RECEIVE_CLOSE_ON_SERVER_TOKEN)
+
+    return receive_close_on_server
+
+
+def _receive_message(state, call, request_deserializer):
+
+    def receive_message(receive_message_event):
+        serialized_request = _serialized_request(receive_message_event)
+        if serialized_request is None:
+            with state.condition:
+                if state.client is _OPEN:
+                    state.client = _CLOSED
+                state.condition.notify_all()
+                return _possibly_finish_call(state, _RECEIVE_MESSAGE_TOKEN)
+        else:
+            request = _common.deserialize(serialized_request,
+                                          request_deserializer)
+            with state.condition:
+                if request is None:
+                    _abort(state, call, cygrpc.StatusCode.internal,
+                           b'Exception deserializing request!')
+                else:
+                    state.request = request
+                state.condition.notify_all()
+                return _possibly_finish_call(state, _RECEIVE_MESSAGE_TOKEN)
+
+    return receive_message
+
+
+def _send_initial_metadata(state):
+
+    def send_initial_metadata(unused_send_initial_metadata_event):
+        with state.condition:
+            return _possibly_finish_call(state, _SEND_INITIAL_METADATA_TOKEN)
+
+    return send_initial_metadata
+
+
+def _send_message(state, token):
+
+    def send_message(unused_send_message_event):
+        with state.condition:
+            state.condition.notify_all()
+            return _possibly_finish_call(state, token)
+
+    return send_message
+
+
+class _Context(grpc.ServicerContext):
+
+    def __init__(self, rpc_event, state, request_deserializer):
+        self._rpc_event = rpc_event
+        self._state = state
+        self._request_deserializer = request_deserializer
+
+    def is_active(self):
+        with self._state.condition:
+            return _is_rpc_state_active(self._state)
+
+    def time_remaining(self):
+        return max(self._rpc_event.call_details.deadline - time.time(), 0)
+
+    def cancel(self):
+        self._rpc_event.call.cancel()
+
+    def add_callback(self, callback):
+        with self._state.condition:
+            if self._state.callbacks is None:
+                return False
+            else:
+                self._state.callbacks.append(callback)
+                return True
+
+    def disable_next_message_compression(self):
+        with self._state.condition:
+            self._state.disable_next_compression = True
+
+    def invocation_metadata(self):
+        return self._rpc_event.invocation_metadata
+
+    def peer(self):
+        return _common.decode(self._rpc_event.call.peer())
+
+    def peer_identities(self):
+        return cygrpc.peer_identities(self._rpc_event.call)
+
+    def peer_identity_key(self):
+        id_key = cygrpc.peer_identity_key(self._rpc_event.call)
+        return id_key if id_key is None else _common.decode(id_key)
+
+    def auth_context(self):
+        return {
+            _common.decode(key): value for key, value in six.iteritems(
+                cygrpc.auth_context(self._rpc_event.call))
+        }
+
+    def set_compression(self, compression):
+        with self._state.condition:
+            self._state.compression_algorithm = compression
+
+    def send_initial_metadata(self, initial_metadata):
+        with self._state.condition:
+            if self._state.client is _CANCELLED:
+                _raise_rpc_error(self._state)
+            else:
+                if self._state.initial_metadata_allowed:
+                    operation = _get_initial_metadata_operation(
+                        self._state, initial_metadata)
+                    self._rpc_event.call.start_server_batch(
+                        (operation,), _send_initial_metadata(self._state))
+                    self._state.initial_metadata_allowed = False
+                    self._state.due.add(_SEND_INITIAL_METADATA_TOKEN)
+                else:
+                    raise ValueError('Initial metadata no longer allowed!')
+
+    def set_trailing_metadata(self, trailing_metadata):
+        with self._state.condition:
+            self._state.trailing_metadata = trailing_metadata
+
+    def trailing_metadata(self):
+        return self._state.trailing_metadata
+
+    def abort(self, code, details):
+        # treat OK like other invalid arguments: fail the RPC
+        if code == grpc.StatusCode.OK:
+            _LOGGER.error(
+                'abort() called with StatusCode.OK; returning UNKNOWN')
+            code = grpc.StatusCode.UNKNOWN
+            details = ''
+        with self._state.condition:
+            self._state.code = code
+            self._state.details = _common.encode(details)
+            self._state.aborted = True
+            raise Exception()
+
+    def abort_with_status(self, status):
+        self._state.trailing_metadata = status.trailing_metadata
+        self.abort(status.code, status.details)
+
+    def set_code(self, code):
+        with self._state.condition:
+            self._state.code = code
+
+    def code(self):
+        return self._state.code
+
+    def set_details(self, details):
+        with self._state.condition:
+            self._state.details = _common.encode(details)
+
+    def details(self):
+        return self._state.details
+
+    def _finalize_state(self):
+        pass
+
+
+class _RequestIterator(object):
+
+    def __init__(self, state, call, request_deserializer):
+        self._state = state
+        self._call = call
+        self._request_deserializer = request_deserializer
+
+    def _raise_or_start_receive_message(self):
+        if self._state.client is _CANCELLED:
+            _raise_rpc_error(self._state)
+        elif not _is_rpc_state_active(self._state):
+            raise StopIteration()
+        else:
+            self._call.start_server_batch(
+                (cygrpc.ReceiveMessageOperation(_EMPTY_FLAGS),),
+                _receive_message(self._state, self._call,
+                                 self._request_deserializer))
+            self._state.due.add(_RECEIVE_MESSAGE_TOKEN)
+
+    def _look_for_request(self):
+        if self._state.client is _CANCELLED:
+            _raise_rpc_error(self._state)
+        elif (self._state.request is None and
+              _RECEIVE_MESSAGE_TOKEN not in self._state.due):
+            raise StopIteration()
+        else:
+            request = self._state.request
+            self._state.request = None
+            return request
+
+        raise AssertionError()  # should never run
+
+    def _next(self):
+        with self._state.condition:
+            self._raise_or_start_receive_message()
+            while True:
+                self._state.condition.wait()
+                request = self._look_for_request()
+                if request is not None:
+                    return request
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        return self._next()
+
+    def next(self):
+        return self._next()
+
+
+def _unary_request(rpc_event, state, request_deserializer):
+
+    def unary_request():
+        with state.condition:
+            if not _is_rpc_state_active(state):
+                return None
+            else:
+                rpc_event.call.start_server_batch(
+                    (cygrpc.ReceiveMessageOperation(_EMPTY_FLAGS),),
+                    _receive_message(state, rpc_event.call,
+                                     request_deserializer))
+                state.due.add(_RECEIVE_MESSAGE_TOKEN)
+                while True:
+                    state.condition.wait()
+                    if state.request is None:
+                        if state.client is _CLOSED:
+                            details = '"{}" requires exactly one request message.'.format(
+                                rpc_event.call_details.method)
+                            _abort(state, rpc_event.call,
+                                   cygrpc.StatusCode.unimplemented,
+                                   _common.encode(details))
+                            return None
+                        elif state.client is _CANCELLED:
+                            return None
+                    else:
+                        request = state.request
+                        state.request = None
+                        return request
+
+    return unary_request
+
+
+def _call_behavior(rpc_event,
+                   state,
+                   behavior,
+                   argument,
+                   request_deserializer,
+                   send_response_callback=None):
+    from grpc import _create_servicer_context
+    with _create_servicer_context(rpc_event, state,
+                                  request_deserializer) as context:
+        try:
+            response_or_iterator = None
+            if send_response_callback is not None:
+                response_or_iterator = behavior(argument, context,
+                                                send_response_callback)
+            else:
+                response_or_iterator = behavior(argument, context)
+            return response_or_iterator, True
+        except Exception as exception:  # pylint: disable=broad-except
+            with state.condition:
+                if state.aborted:
+                    _abort(state, rpc_event.call, cygrpc.StatusCode.unknown,
+                           b'RPC Aborted')
+                elif exception not in state.rpc_errors:
+                    details = 'Exception calling application: {}'.format(
+                        exception)
+                    _LOGGER.exception(details)
+                    _abort(state, rpc_event.call, cygrpc.StatusCode.unknown,
+                           _common.encode(details))
+            return None, False
+
+
+def _take_response_from_response_iterator(rpc_event, state, response_iterator):
+    try:
+        return next(response_iterator), True
+    except StopIteration:
+        return None, True
+    except Exception as exception:  # pylint: disable=broad-except
+        with state.condition:
+            if state.aborted:
+                _abort(state, rpc_event.call, cygrpc.StatusCode.unknown,
+                       b'RPC Aborted')
+            elif exception not in state.rpc_errors:
+                details = 'Exception iterating responses: {}'.format(exception)
+                _LOGGER.exception(details)
+                _abort(state, rpc_event.call, cygrpc.StatusCode.unknown,
+                       _common.encode(details))
+        return None, False
+
+
+def _serialize_response(rpc_event, state, response, response_serializer):
+    serialized_response = _common.serialize(response, response_serializer)
+    if serialized_response is None:
+        with state.condition:
+            _abort(state, rpc_event.call, cygrpc.StatusCode.internal,
+                   b'Failed to serialize response!')
+        return None
+    else:
+        return serialized_response
+
+
+def _get_send_message_op_flags_from_state(state):
+    if state.disable_next_compression:
+        return cygrpc.WriteFlag.no_compress
+    else:
+        return _EMPTY_FLAGS
+
+
+def _reset_per_message_state(state):
+    with state.condition:
+        state.disable_next_compression = False
+
+
+def _send_response(rpc_event, state, serialized_response):
+    with state.condition:
+        if not _is_rpc_state_active(state):
+            return False
+        else:
+            if state.initial_metadata_allowed:
+                operations = (
+                    _get_initial_metadata_operation(state, None),
+                    cygrpc.SendMessageOperation(
+                        serialized_response,
+                        _get_send_message_op_flags_from_state(state)),
+                )
+                state.initial_metadata_allowed = False
+                token = _SEND_INITIAL_METADATA_AND_SEND_MESSAGE_TOKEN
+            else:
+                operations = (cygrpc.SendMessageOperation(
+                    serialized_response,
+                    _get_send_message_op_flags_from_state(state)),)
+                token = _SEND_MESSAGE_TOKEN
+            rpc_event.call.start_server_batch(operations,
+                                              _send_message(state, token))
+            state.due.add(token)
+            _reset_per_message_state(state)
+            while True:
+                state.condition.wait()
+                if token not in state.due:
+                    return _is_rpc_state_active(state)
+
+
+def _status(rpc_event, state, serialized_response):
+    with state.condition:
+        if state.client is not _CANCELLED:
+            code = _completion_code(state)
+            details = _details(state)
+            operations = [
+                cygrpc.SendStatusFromServerOperation(state.trailing_metadata,
+                                                     code, details,
+                                                     _EMPTY_FLAGS),
+            ]
+            if state.initial_metadata_allowed:
+                operations.append(_get_initial_metadata_operation(state, None))
+            if serialized_response is not None:
+                operations.append(
+                    cygrpc.SendMessageOperation(
+                        serialized_response,
+                        _get_send_message_op_flags_from_state(state)))
+            rpc_event.call.start_server_batch(
+                operations,
+                _send_status_from_server(state, _SEND_STATUS_FROM_SERVER_TOKEN))
+            state.statused = True
+            _reset_per_message_state(state)
+            state.due.add(_SEND_STATUS_FROM_SERVER_TOKEN)
+
+
+def _unary_response_in_pool(rpc_event, state, behavior, argument_thunk,
+                            request_deserializer, response_serializer):
+    cygrpc.install_context_from_request_call_event(rpc_event)
+    try:
+        argument = argument_thunk()
+        if argument is not None:
+            response, proceed = _call_behavior(rpc_event, state, behavior,
+                                               argument, request_deserializer)
+            if proceed:
+                serialized_response = _serialize_response(
+                    rpc_event, state, response, response_serializer)
+                if serialized_response is not None:
+                    _status(rpc_event, state, serialized_response)
+    finally:
+        cygrpc.uninstall_context()
+
+
+def _stream_response_in_pool(rpc_event, state, behavior, argument_thunk,
+                             request_deserializer, response_serializer):
+    cygrpc.install_context_from_request_call_event(rpc_event)
+
+    def send_response(response):
+        if response is None:
+            _status(rpc_event, state, None)
+        else:
+            serialized_response = _serialize_response(rpc_event, state,
+                                                      response,
+                                                      response_serializer)
+            if serialized_response is not None:
+                _send_response(rpc_event, state, serialized_response)
+
+    try:
+        argument = argument_thunk()
+        if argument is not None:
+            if hasattr(behavior, 'experimental_non_blocking'
+                      ) and behavior.experimental_non_blocking:
+                _call_behavior(rpc_event,
+                               state,
+                               behavior,
+                               argument,
+                               request_deserializer,
+                               send_response_callback=send_response)
+            else:
+                response_iterator, proceed = _call_behavior(
+                    rpc_event, state, behavior, argument, request_deserializer)
+                if proceed:
+                    _send_message_callback_to_blocking_iterator_adapter(
+                        rpc_event, state, send_response, response_iterator)
+    finally:
+        cygrpc.uninstall_context()
+
+
+def _is_rpc_state_active(state):
+    return state.client is not _CANCELLED and not state.statused
+
+
+def _send_message_callback_to_blocking_iterator_adapter(rpc_event, state,
+                                                        send_response_callback,
+                                                        response_iterator):
+    while True:
+        response, proceed = _take_response_from_response_iterator(
+            rpc_event, state, response_iterator)
+        if proceed:
+            send_response_callback(response)
+            if not _is_rpc_state_active(state):
+                break
+        else:
+            break
+
+
+def _select_thread_pool_for_behavior(behavior, default_thread_pool):
+    if hasattr(behavior, 'experimental_thread_pool') and isinstance(
+            behavior.experimental_thread_pool, futures.ThreadPoolExecutor):
+        return behavior.experimental_thread_pool
+    else:
+        return default_thread_pool
+
+
+def _handle_unary_unary(rpc_event, state, method_handler, default_thread_pool):
+    unary_request = _unary_request(rpc_event, state,
+                                   method_handler.request_deserializer)
+    thread_pool = _select_thread_pool_for_behavior(method_handler.unary_unary,
+                                                   default_thread_pool)
+    return thread_pool.submit(_unary_response_in_pool, rpc_event, state,
+                              method_handler.unary_unary, unary_request,
+                              method_handler.request_deserializer,
+                              method_handler.response_serializer)
+
+
+def _handle_unary_stream(rpc_event, state, method_handler, default_thread_pool):
+    unary_request = _unary_request(rpc_event, state,
+                                   method_handler.request_deserializer)
+    thread_pool = _select_thread_pool_for_behavior(method_handler.unary_stream,
+                                                   default_thread_pool)
+    return thread_pool.submit(_stream_response_in_pool, rpc_event, state,
+                              method_handler.unary_stream, unary_request,
+                              method_handler.request_deserializer,
+                              method_handler.response_serializer)
+
+
+def _handle_stream_unary(rpc_event, state, method_handler, default_thread_pool):
+    request_iterator = _RequestIterator(state, rpc_event.call,
+                                        method_handler.request_deserializer)
+    thread_pool = _select_thread_pool_for_behavior(method_handler.stream_unary,
+                                                   default_thread_pool)
+    return thread_pool.submit(_unary_response_in_pool, rpc_event, state,
+                              method_handler.stream_unary,
+                              lambda: request_iterator,
+                              method_handler.request_deserializer,
+                              method_handler.response_serializer)
+
+
+def _handle_stream_stream(rpc_event, state, method_handler,
+                          default_thread_pool):
+    request_iterator = _RequestIterator(state, rpc_event.call,
+                                        method_handler.request_deserializer)
+    thread_pool = _select_thread_pool_for_behavior(method_handler.stream_stream,
+                                                   default_thread_pool)
+    return thread_pool.submit(_stream_response_in_pool, rpc_event, state,
+                              method_handler.stream_stream,
+                              lambda: request_iterator,
+                              method_handler.request_deserializer,
+                              method_handler.response_serializer)
+
+
+def _find_method_handler(rpc_event, generic_handlers, interceptor_pipeline):
+
+    def query_handlers(handler_call_details):
+        for generic_handler in generic_handlers:
+            method_handler = generic_handler.service(handler_call_details)
+            if method_handler is not None:
+                return method_handler
+        return None
+
+    handler_call_details = _HandlerCallDetails(
+        _common.decode(rpc_event.call_details.method),
+        rpc_event.invocation_metadata)
+
+    if interceptor_pipeline is not None:
+        return interceptor_pipeline.execute(query_handlers,
+                                            handler_call_details)
+    else:
+        return query_handlers(handler_call_details)
+
+
+def _reject_rpc(rpc_event, status, details):
+    rpc_state = _RPCState()
+    operations = (
+        _get_initial_metadata_operation(rpc_state, None),
+        cygrpc.ReceiveCloseOnServerOperation(_EMPTY_FLAGS),
+        cygrpc.SendStatusFromServerOperation(None, status, details,
+                                             _EMPTY_FLAGS),
+    )
+    rpc_event.call.start_server_batch(operations, lambda ignored_event: (
+        rpc_state,
+        (),
+    ))
+    return rpc_state
+
+
+def _handle_with_method_handler(rpc_event, method_handler, thread_pool):
+    state = _RPCState()
+    with state.condition:
+        rpc_event.call.start_server_batch(
+            (cygrpc.ReceiveCloseOnServerOperation(_EMPTY_FLAGS),),
+            _receive_close_on_server(state))
+        state.due.add(_RECEIVE_CLOSE_ON_SERVER_TOKEN)
+        if method_handler.request_streaming:
+            if method_handler.response_streaming:
+                return state, _handle_stream_stream(rpc_event, state,
+                                                    method_handler, thread_pool)
+            else:
+                return state, _handle_stream_unary(rpc_event, state,
+                                                   method_handler, thread_pool)
+        else:
+            if method_handler.response_streaming:
+                return state, _handle_unary_stream(rpc_event, state,
+                                                   method_handler, thread_pool)
+            else:
+                return state, _handle_unary_unary(rpc_event, state,
+                                                  method_handler, thread_pool)
+
+
+def _handle_call(rpc_event, generic_handlers, interceptor_pipeline, thread_pool,
+                 concurrency_exceeded):
+    if not rpc_event.success:
+        return None, None
+    if rpc_event.call_details.method is not None:
+        try:
+            method_handler = _find_method_handler(rpc_event, generic_handlers,
+                                                  interceptor_pipeline)
+        except Exception as exception:  # pylint: disable=broad-except
+            details = 'Exception servicing handler: {}'.format(exception)
+            _LOGGER.exception(details)
+            return _reject_rpc(rpc_event, cygrpc.StatusCode.unknown,
+                               b'Error in service handler!'), None
+        if method_handler is None:
+            return _reject_rpc(rpc_event, cygrpc.StatusCode.unimplemented,
+                               b'Method not found!'), None
+        elif concurrency_exceeded:
+            return _reject_rpc(rpc_event, cygrpc.StatusCode.resource_exhausted,
+                               b'Concurrent RPC limit exceeded!'), None
+        else:
+            return _handle_with_method_handler(rpc_event, method_handler,
+                                               thread_pool)
+    else:
+        return None, None
+
+
+@enum.unique
+class _ServerStage(enum.Enum):
+    STOPPED = 'stopped'
+    STARTED = 'started'
+    GRACE = 'grace'
+
+
+class _ServerState(object):
+
+    # pylint: disable=too-many-arguments
+    def __init__(self, completion_queue, server, generic_handlers,
+                 interceptor_pipeline, thread_pool, maximum_concurrent_rpcs):
+        self.lock = threading.RLock()
+        self.completion_queue = completion_queue
+        self.server = server
+        self.generic_handlers = list(generic_handlers)
+        self.interceptor_pipeline = interceptor_pipeline
+        self.thread_pool = thread_pool
+        self.stage = _ServerStage.STOPPED
+        self.termination_event = threading.Event()
+        self.shutdown_events = [self.termination_event]
+        self.maximum_concurrent_rpcs = maximum_concurrent_rpcs
+        self.active_rpc_count = 0
+
+        # TODO(https://github.com/grpc/grpc/issues/6597): eliminate these fields.
+        self.rpc_states = set()
+        self.due = set()
+
+        # A "volatile" flag to interrupt the daemon serving thread
+        self.server_deallocated = False
+
+
+def _add_generic_handlers(state, generic_handlers):
+    with state.lock:
+        state.generic_handlers.extend(generic_handlers)
+
+
+def _add_insecure_port(state, address):
+    with state.lock:
+        return state.server.add_http2_port(address)
+
+
+def _add_secure_port(state, address, server_credentials):
+    with state.lock:
+        return state.server.add_http2_port(address,
+                                           server_credentials._credentials)
+
+
+def _request_call(state):
+    state.server.request_call(state.completion_queue, state.completion_queue,
+                              _REQUEST_CALL_TAG)
+    state.due.add(_REQUEST_CALL_TAG)
+
+
+# TODO(https://github.com/grpc/grpc/issues/6597): delete this function.
+def _stop_serving(state):
+    if not state.rpc_states and not state.due:
+        state.server.destroy()
+        for shutdown_event in state.shutdown_events:
+            shutdown_event.set()
+        state.stage = _ServerStage.STOPPED
+        return True
+    else:
+        return False
+
+
+def _on_call_completed(state):
+    with state.lock:
+        state.active_rpc_count -= 1
+
+
+def _process_event_and_continue(state, event):
+    should_continue = True
+    if event.tag is _SHUTDOWN_TAG:
+        with state.lock:
+            state.due.remove(_SHUTDOWN_TAG)
+            if _stop_serving(state):
+                should_continue = False
+    elif event.tag is _REQUEST_CALL_TAG:
+        with state.lock:
+            state.due.remove(_REQUEST_CALL_TAG)
+            concurrency_exceeded = (
+                state.maximum_concurrent_rpcs is not None and
+                state.active_rpc_count >= state.maximum_concurrent_rpcs)
+            rpc_state, rpc_future = _handle_call(event, state.generic_handlers,
+                                                 state.interceptor_pipeline,
+                                                 state.thread_pool,
+                                                 concurrency_exceeded)
+            if rpc_state is not None:
+                state.rpc_states.add(rpc_state)
+            if rpc_future is not None:
+                state.active_rpc_count += 1
+                rpc_future.add_done_callback(
+                    lambda unused_future: _on_call_completed(state))
+            if state.stage is _ServerStage.STARTED:
+                _request_call(state)
+            elif _stop_serving(state):
+                should_continue = False
+    else:
+        rpc_state, callbacks = event.tag(event)
+        for callback in callbacks:
+            try:
+                callback()
+            except Exception:  # pylint: disable=broad-except
+                _LOGGER.exception('Exception calling callback!')
+        if rpc_state is not None:
+            with state.lock:
+                state.rpc_states.remove(rpc_state)
+                if _stop_serving(state):
+                    should_continue = False
+    return should_continue
+
+
+def _serve(state):
+    while True:
+        timeout = time.time() + _DEALLOCATED_SERVER_CHECK_PERIOD_S
+        event = state.completion_queue.poll(timeout)
+        if state.server_deallocated:
+            _begin_shutdown_once(state)
+        if event.completion_type != cygrpc.CompletionType.queue_timeout:
+            if not _process_event_and_continue(state, event):
+                return
+        # We want to force the deletion of the previous event
+        # ~before~ we poll again; if the event has a reference
+        # to a shutdown Call object, this can induce spinlock.
+        event = None
+
+
+def _begin_shutdown_once(state):
+    with state.lock:
+        if state.stage is _ServerStage.STARTED:
+            state.server.shutdown(state.completion_queue, _SHUTDOWN_TAG)
+            state.stage = _ServerStage.GRACE
+            state.due.add(_SHUTDOWN_TAG)
+
+
+def _stop(state, grace):
+    with state.lock:
+        if state.stage is _ServerStage.STOPPED:
+            shutdown_event = threading.Event()
+            shutdown_event.set()
+            return shutdown_event
+        else:
+            _begin_shutdown_once(state)
+            shutdown_event = threading.Event()
+            state.shutdown_events.append(shutdown_event)
+            if grace is None:
+                state.server.cancel_all_calls()
+            else:
+
+                def cancel_all_calls_after_grace():
+                    shutdown_event.wait(timeout=grace)
+                    with state.lock:
+                        state.server.cancel_all_calls()
+
+                thread = threading.Thread(target=cancel_all_calls_after_grace)
+                thread.start()
+                return shutdown_event
+    shutdown_event.wait()
+    return shutdown_event
+
+
+def _start(state):
+    with state.lock:
+        if state.stage is not _ServerStage.STOPPED:
+            raise ValueError('Cannot start already-started server!')
+        state.server.start()
+        state.stage = _ServerStage.STARTED
+        _request_call(state)
+
+        thread = threading.Thread(target=_serve, args=(state,))
+        thread.daemon = True
+        thread.start()
+
+
+def _validate_generic_rpc_handlers(generic_rpc_handlers):
+    for generic_rpc_handler in generic_rpc_handlers:
+        service_attribute = getattr(generic_rpc_handler, 'service', None)
+        if service_attribute is None:
+            raise AttributeError(
+                '"{}" must conform to grpc.GenericRpcHandler type but does '
+                'not have "service" method!'.format(generic_rpc_handler))
+
+
+def _augment_options(base_options, compression):
+    compression_option = _compression.create_channel_option(compression)
+    return tuple(base_options) + compression_option
+
+
+class _Server(grpc.Server):
+
+    # pylint: disable=too-many-arguments
+    def __init__(self, thread_pool, generic_handlers, interceptors, options,
+                 maximum_concurrent_rpcs, compression, xds):
+        completion_queue = cygrpc.CompletionQueue()
+        server = cygrpc.Server(_augment_options(options, compression), xds)
+        server.register_completion_queue(completion_queue)
+        self._state = _ServerState(completion_queue, server, generic_handlers,
+                                   _interceptor.service_pipeline(interceptors),
+                                   thread_pool, maximum_concurrent_rpcs)
+
+    def add_generic_rpc_handlers(self, generic_rpc_handlers):
+        _validate_generic_rpc_handlers(generic_rpc_handlers)
+        _add_generic_handlers(self._state, generic_rpc_handlers)
+
+    def add_insecure_port(self, address):
+        return _common.validate_port_binding_result(
+            address, _add_insecure_port(self._state, _common.encode(address)))
+
+    def add_secure_port(self, address, server_credentials):
+        return _common.validate_port_binding_result(
+            address,
+            _add_secure_port(self._state, _common.encode(address),
+                             server_credentials))
+
+    def start(self):
+        _start(self._state)
+
+    def wait_for_termination(self, timeout=None):
+        # NOTE(https://bugs.python.org/issue35935)
+        # Remove this workaround once threading.Event.wait() is working with
+        # CTRL+C across platforms.
+        return _common.wait(self._state.termination_event.wait,
+                            self._state.termination_event.is_set,
+                            timeout=timeout)
+
+    def stop(self, grace):
+        return _stop(self._state, grace)
+
+    def __del__(self):
+        if hasattr(self, '_state'):
+            # We can not grab a lock in __del__(), so set a flag to signal the
+            # serving daemon thread (if it exists) to initiate shutdown.
+            self._state.server_deallocated = True
+
+
+def create_server(thread_pool, generic_rpc_handlers, interceptors, options,
+                  maximum_concurrent_rpcs, compression, xds):
+    _validate_generic_rpc_handlers(generic_rpc_handlers)
+    return _Server(thread_pool, generic_rpc_handlers, interceptors, options,
+                   maximum_concurrent_rpcs, compression, xds)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/grpc/_simple_stubs.py

@@ -0,0 +1,486 @@
+# Copyright 2020 The gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Functions that obviate explicit stubs and explicit channels."""
+
+import collections
+import datetime
+import logging
+import os
+import threading
+from typing import (Any, AnyStr, Callable, Dict, Iterator, Optional, Sequence,
+                    Tuple, TypeVar, Union)
+
+import grpc
+from grpc.experimental import experimental_api
+
+RequestType = TypeVar('RequestType')
+ResponseType = TypeVar('ResponseType')
+
+OptionsType = Sequence[Tuple[str, str]]
+CacheKey = Tuple[str, OptionsType, Optional[grpc.ChannelCredentials],
+                 Optional[grpc.Compression]]
+
+_LOGGER = logging.getLogger(__name__)
+
+_EVICTION_PERIOD_KEY = "GRPC_PYTHON_MANAGED_CHANNEL_EVICTION_SECONDS"
+if _EVICTION_PERIOD_KEY in os.environ:
+    _EVICTION_PERIOD = datetime.timedelta(
+        seconds=float(os.environ[_EVICTION_PERIOD_KEY]))
+    _LOGGER.debug("Setting managed channel eviction period to %s",
+                  _EVICTION_PERIOD)
+else:
+    _EVICTION_PERIOD = datetime.timedelta(minutes=10)
+
+_MAXIMUM_CHANNELS_KEY = "GRPC_PYTHON_MANAGED_CHANNEL_MAXIMUM"
+if _MAXIMUM_CHANNELS_KEY in os.environ:
+    _MAXIMUM_CHANNELS = int(os.environ[_MAXIMUM_CHANNELS_KEY])
+    _LOGGER.debug("Setting maximum managed channels to %d", _MAXIMUM_CHANNELS)
+else:
+    _MAXIMUM_CHANNELS = 2**8
+
+_DEFAULT_TIMEOUT_KEY = "GRPC_PYTHON_DEFAULT_TIMEOUT_SECONDS"
+if _DEFAULT_TIMEOUT_KEY in os.environ:
+    _DEFAULT_TIMEOUT = float(os.environ[_DEFAULT_TIMEOUT_KEY])
+    _LOGGER.debug("Setting default timeout seconds to %f", _DEFAULT_TIMEOUT)
+else:
+    _DEFAULT_TIMEOUT = 60.0
+
+
+def _create_channel(target: str, options: Sequence[Tuple[str, str]],
+                    channel_credentials: Optional[grpc.ChannelCredentials],
+                    compression: Optional[grpc.Compression]) -> grpc.Channel:
+    _LOGGER.debug(
+        f"Creating secure channel with credentials '{channel_credentials}', " +
+        f"options '{options}' and compression '{compression}'")
+    return grpc.secure_channel(target,
+                               credentials=channel_credentials,
+                               options=options,
+                               compression=compression)
+
+
+class ChannelCache:
+    # NOTE(rbellevi): Untyped due to reference cycle.
+    _singleton = None
+    _lock: threading.RLock = threading.RLock()
+    _condition: threading.Condition = threading.Condition(lock=_lock)
+    _eviction_ready: threading.Event = threading.Event()
+
+    _mapping: Dict[CacheKey, Tuple[grpc.Channel, datetime.datetime]]
+    _eviction_thread: threading.Thread
+
+    def __init__(self):
+        self._mapping = collections.OrderedDict()
+        self._eviction_thread = threading.Thread(
+            target=ChannelCache._perform_evictions, daemon=True)
+        self._eviction_thread.start()
+
+    @staticmethod
+    def get():
+        with ChannelCache._lock:
+            if ChannelCache._singleton is None:
+                ChannelCache._singleton = ChannelCache()
+        ChannelCache._eviction_ready.wait()
+        return ChannelCache._singleton
+
+    def _evict_locked(self, key: CacheKey):
+        channel, _ = self._mapping.pop(key)
+        _LOGGER.debug("Evicting channel %s with configuration %s.", channel,
+                      key)
+        channel.close()
+        del channel
+
+    @staticmethod
+    def _perform_evictions():
+        while True:
+            with ChannelCache._lock:
+                ChannelCache._eviction_ready.set()
+                if not ChannelCache._singleton._mapping:
+                    ChannelCache._condition.wait()
+                elif len(ChannelCache._singleton._mapping) > _MAXIMUM_CHANNELS:
+                    key = next(iter(ChannelCache._singleton._mapping.keys()))
+                    ChannelCache._singleton._evict_locked(key)
+                    # And immediately reevaluate.
+                else:
+                    key, (_, eviction_time) = next(
+                        iter(ChannelCache._singleton._mapping.items()))
+                    now = datetime.datetime.now()
+                    if eviction_time <= now:
+                        ChannelCache._singleton._evict_locked(key)
+                        continue
+                    else:
+                        time_to_eviction = (eviction_time - now).total_seconds()
+                        # NOTE: We aim to *eventually* coalesce to a state in
+                        # which no overdue channels are in the cache and the
+                        # length of the cache is longer than _MAXIMUM_CHANNELS.
+                        # We tolerate momentary states in which these two
+                        # criteria are not met.
+                        ChannelCache._condition.wait(timeout=time_to_eviction)
+
+    def get_channel(self, target: str, options: Sequence[Tuple[str, str]],
+                    channel_credentials: Optional[grpc.ChannelCredentials],
+                    insecure: bool,
+                    compression: Optional[grpc.Compression]) -> grpc.Channel:
+        if insecure and channel_credentials:
+            raise ValueError("The insecure option is mutually exclusive with " +
+                             "the channel_credentials option. Please use one " +
+                             "or the other.")
+        if insecure:
+            channel_credentials = grpc.experimental.insecure_channel_credentials(
+            )
+        elif channel_credentials is None:
+            _LOGGER.debug("Defaulting to SSL channel credentials.")
+            channel_credentials = grpc.ssl_channel_credentials()
+        key = (target, options, channel_credentials, compression)
+        with self._lock:
+            channel_data = self._mapping.get(key, None)
+            if channel_data is not None:
+                channel = channel_data[0]
+                self._mapping.pop(key)
+                self._mapping[key] = (channel, datetime.datetime.now() +
+                                      _EVICTION_PERIOD)
+                return channel
+            else:
+                channel = _create_channel(target, options, channel_credentials,
+                                          compression)
+                self._mapping[key] = (channel, datetime.datetime.now() +
+                                      _EVICTION_PERIOD)
+                if len(self._mapping) == 1 or len(
+                        self._mapping) >= _MAXIMUM_CHANNELS:
+                    self._condition.notify()
+                return channel
+
+    def _test_only_channel_count(self) -> int:
+        with self._lock:
+            return len(self._mapping)
+
+
+@experimental_api
+def unary_unary(
+    request: RequestType,
+    target: str,
+    method: str,
+    request_serializer: Optional[Callable[[Any], bytes]] = None,
+    response_deserializer: Optional[Callable[[bytes], Any]] = None,
+    options: Sequence[Tuple[AnyStr, AnyStr]] = (),
+    channel_credentials: Optional[grpc.ChannelCredentials] = None,
+    insecure: bool = False,
+    call_credentials: Optional[grpc.CallCredentials] = None,
+    compression: Optional[grpc.Compression] = None,
+    wait_for_ready: Optional[bool] = None,
+    timeout: Optional[float] = _DEFAULT_TIMEOUT,
+    metadata: Optional[Sequence[Tuple[str, Union[str, bytes]]]] = None
+) -> ResponseType:
+    """Invokes a unary-unary RPC without an explicitly specified channel.
+
+    THIS IS AN EXPERIMENTAL API.
+
+    This is backed by a per-process cache of channels. Channels are evicted
+    from the cache after a fixed period by a background. Channels will also be
+    evicted if more than a configured maximum accumulate.
+
+    The default eviction period is 10 minutes. One may set the environment
+    variable "GRPC_PYTHON_MANAGED_CHANNEL_EVICTION_SECONDS" to configure this.
+
+    The default maximum number of channels is 256. One may set the
+    environment variable "GRPC_PYTHON_MANAGED_CHANNEL_MAXIMUM" to configure
+    this.
+
+    Args:
+      request: An iterator that yields request values for the RPC.
+      target: The server address.
+      method: The name of the RPC method.
+      request_serializer: Optional :term:`serializer` for serializing the request
+        message. Request goes unserialized in case None is passed.
+      response_deserializer: Optional :term:`deserializer` for deserializing the response
+        message. Response goes undeserialized in case None is passed.
+      options: An optional list of key-value pairs (:term:`channel_arguments` in gRPC Core
+        runtime) to configure the channel.
+      channel_credentials: A credential applied to the whole channel, e.g. the
+        return value of grpc.ssl_channel_credentials() or
+        grpc.insecure_channel_credentials().
+      insecure: If True, specifies channel_credentials as
+        :term:`grpc.insecure_channel_credentials()`. This option is mutually
+        exclusive with the `channel_credentials` option.
+      call_credentials: A call credential applied to each call individually,
+        e.g. the output of grpc.metadata_call_credentials() or
+        grpc.access_token_call_credentials().
+      compression: An optional value indicating the compression method to be
+        used over the lifetime of the channel, e.g. grpc.Compression.Gzip.
+      wait_for_ready: An optional flag indicating whether the RPC should fail
+        immediately if the connection is not ready at the time the RPC is
+        invoked, or if it should wait until the connection to the server
+        becomes ready. When using this option, the user will likely also want
+        to set a timeout. Defaults to True.
+      timeout: An optional duration of time in seconds to allow for the RPC,
+        after which an exception will be raised. If timeout is unspecified,
+        defaults to a timeout controlled by the
+        GRPC_PYTHON_DEFAULT_TIMEOUT_SECONDS environment variable. If that is
+        unset, defaults to 60 seconds. Supply a value of None to indicate that
+        no timeout should be enforced.
+      metadata: Optional metadata to send to the server.
+
+    Returns:
+      The response to the RPC.
+    """
+    channel = ChannelCache.get().get_channel(target, options,
+                                             channel_credentials, insecure,
+                                             compression)
+    multicallable = channel.unary_unary(method, request_serializer,
+                                        response_deserializer)
+    wait_for_ready = wait_for_ready if wait_for_ready is not None else True
+    return multicallable(request,
+                         metadata=metadata,
+                         wait_for_ready=wait_for_ready,
+                         credentials=call_credentials,
+                         timeout=timeout)
+
+
+@experimental_api
+def unary_stream(
+    request: RequestType,
+    target: str,
+    method: str,
+    request_serializer: Optional[Callable[[Any], bytes]] = None,
+    response_deserializer: Optional[Callable[[bytes], Any]] = None,
+    options: Sequence[Tuple[AnyStr, AnyStr]] = (),
+    channel_credentials: Optional[grpc.ChannelCredentials] = None,
+    insecure: bool = False,
+    call_credentials: Optional[grpc.CallCredentials] = None,
+    compression: Optional[grpc.Compression] = None,
+    wait_for_ready: Optional[bool] = None,
+    timeout: Optional[float] = _DEFAULT_TIMEOUT,
+    metadata: Optional[Sequence[Tuple[str, Union[str, bytes]]]] = None
+) -> Iterator[ResponseType]:
+    """Invokes a unary-stream RPC without an explicitly specified channel.
+
+    THIS IS AN EXPERIMENTAL API.
+
+    This is backed by a per-process cache of channels. Channels are evicted
+    from the cache after a fixed period by a background. Channels will also be
+    evicted if more than a configured maximum accumulate.
+
+    The default eviction period is 10 minutes. One may set the environment
+    variable "GRPC_PYTHON_MANAGED_CHANNEL_EVICTION_SECONDS" to configure this.
+
+    The default maximum number of channels is 256. One may set the
+    environment variable "GRPC_PYTHON_MANAGED_CHANNEL_MAXIMUM" to configure
+    this.
+
+    Args:
+      request: An iterator that yields request values for the RPC.
+      target: The server address.
+      method: The name of the RPC method.
+      request_serializer: Optional :term:`serializer` for serializing the request
+        message. Request goes unserialized in case None is passed.
+      response_deserializer: Optional :term:`deserializer` for deserializing the response
+        message. Response goes undeserialized in case None is passed.
+      options: An optional list of key-value pairs (:term:`channel_arguments` in gRPC Core
+        runtime) to configure the channel.
+      channel_credentials: A credential applied to the whole channel, e.g. the
+        return value of grpc.ssl_channel_credentials().
+      insecure: If True, specifies channel_credentials as
+        :term:`grpc.insecure_channel_credentials()`. This option is mutually
+        exclusive with the `channel_credentials` option.
+      call_credentials: A call credential applied to each call individually,
+        e.g. the output of grpc.metadata_call_credentials() or
+        grpc.access_token_call_credentials().
+      compression: An optional value indicating the compression method to be
+        used over the lifetime of the channel, e.g. grpc.Compression.Gzip.
+      wait_for_ready: An optional flag indicating whether the RPC should fail
+        immediately if the connection is not ready at the time the RPC is
+        invoked, or if it should wait until the connection to the server
+        becomes ready. When using this option, the user will likely also want
+        to set a timeout. Defaults to True.
+      timeout: An optional duration of time in seconds to allow for the RPC,
+        after which an exception will be raised. If timeout is unspecified,
+        defaults to a timeout controlled by the
+        GRPC_PYTHON_DEFAULT_TIMEOUT_SECONDS environment variable. If that is
+        unset, defaults to 60 seconds. Supply a value of None to indicate that
+        no timeout should be enforced.
+      metadata: Optional metadata to send to the server.
+
+    Returns:
+      An iterator of responses.
+    """
+    channel = ChannelCache.get().get_channel(target, options,
+                                             channel_credentials, insecure,
+                                             compression)
+    multicallable = channel.unary_stream(method, request_serializer,
+                                         response_deserializer)
+    wait_for_ready = wait_for_ready if wait_for_ready is not None else True
+    return multicallable(request,
+                         metadata=metadata,
+                         wait_for_ready=wait_for_ready,
+                         credentials=call_credentials,
+                         timeout=timeout)
+
+
+@experimental_api
+def stream_unary(
+    request_iterator: Iterator[RequestType],
+    target: str,
+    method: str,
+    request_serializer: Optional[Callable[[Any], bytes]] = None,
+    response_deserializer: Optional[Callable[[bytes], Any]] = None,
+    options: Sequence[Tuple[AnyStr, AnyStr]] = (),
+    channel_credentials: Optional[grpc.ChannelCredentials] = None,
+    insecure: bool = False,
+    call_credentials: Optional[grpc.CallCredentials] = None,
+    compression: Optional[grpc.Compression] = None,
+    wait_for_ready: Optional[bool] = None,
+    timeout: Optional[float] = _DEFAULT_TIMEOUT,
+    metadata: Optional[Sequence[Tuple[str, Union[str, bytes]]]] = None
+) -> ResponseType:
+    """Invokes a stream-unary RPC without an explicitly specified channel.
+
+    THIS IS AN EXPERIMENTAL API.
+
+    This is backed by a per-process cache of channels. Channels are evicted
+    from the cache after a fixed period by a background. Channels will also be
+    evicted if more than a configured maximum accumulate.
+
+    The default eviction period is 10 minutes. One may set the environment
+    variable "GRPC_PYTHON_MANAGED_CHANNEL_EVICTION_SECONDS" to configure this.
+
+    The default maximum number of channels is 256. One may set the
+    environment variable "GRPC_PYTHON_MANAGED_CHANNEL_MAXIMUM" to configure
+    this.
+
+    Args:
+      request_iterator: An iterator that yields request values for the RPC.
+      target: The server address.
+      method: The name of the RPC method.
+      request_serializer: Optional :term:`serializer` for serializing the request
+        message. Request goes unserialized in case None is passed.
+      response_deserializer: Optional :term:`deserializer` for deserializing the response
+        message. Response goes undeserialized in case None is passed.
+      options: An optional list of key-value pairs (:term:`channel_arguments` in gRPC Core
+        runtime) to configure the channel.
+      channel_credentials: A credential applied to the whole channel, e.g. the
+        return value of grpc.ssl_channel_credentials().
+      call_credentials: A call credential applied to each call individually,
+        e.g. the output of grpc.metadata_call_credentials() or
+        grpc.access_token_call_credentials().
+      insecure: If True, specifies channel_credentials as
+        :term:`grpc.insecure_channel_credentials()`. This option is mutually
+        exclusive with the `channel_credentials` option.
+      compression: An optional value indicating the compression method to be
+        used over the lifetime of the channel, e.g. grpc.Compression.Gzip.
+      wait_for_ready: An optional flag indicating whether the RPC should fail
+        immediately if the connection is not ready at the time the RPC is
+        invoked, or if it should wait until the connection to the server
+        becomes ready. When using this option, the user will likely also want
+        to set a timeout. Defaults to True.
+      timeout: An optional duration of time in seconds to allow for the RPC,
+        after which an exception will be raised. If timeout is unspecified,
+        defaults to a timeout controlled by the
+        GRPC_PYTHON_DEFAULT_TIMEOUT_SECONDS environment variable. If that is
+        unset, defaults to 60 seconds. Supply a value of None to indicate that
+        no timeout should be enforced.
+      metadata: Optional metadata to send to the server.
+
+    Returns:
+      The response to the RPC.
+    """
+    channel = ChannelCache.get().get_channel(target, options,
+                                             channel_credentials, insecure,
+                                             compression)
+    multicallable = channel.stream_unary(method, request_serializer,
+                                         response_deserializer)
+    wait_for_ready = wait_for_ready if wait_for_ready is not None else True
+    return multicallable(request_iterator,
+                         metadata=metadata,
+                         wait_for_ready=wait_for_ready,
+                         credentials=call_credentials,
+                         timeout=timeout)
+
+
+@experimental_api
+def stream_stream(
+    request_iterator: Iterator[RequestType],
+    target: str,
+    method: str,
+    request_serializer: Optional[Callable[[Any], bytes]] = None,
+    response_deserializer: Optional[Callable[[bytes], Any]] = None,
+    options: Sequence[Tuple[AnyStr, AnyStr]] = (),
+    channel_credentials: Optional[grpc.ChannelCredentials] = None,
+    insecure: bool = False,
+    call_credentials: Optional[grpc.CallCredentials] = None,
+    compression: Optional[grpc.Compression] = None,
+    wait_for_ready: Optional[bool] = None,
+    timeout: Optional[float] = _DEFAULT_TIMEOUT,
+    metadata: Optional[Sequence[Tuple[str, Union[str, bytes]]]] = None
+) -> Iterator[ResponseType]:
+    """Invokes a stream-stream RPC without an explicitly specified channel.
+
+    THIS IS AN EXPERIMENTAL API.
+
+    This is backed by a per-process cache of channels. Channels are evicted
+    from the cache after a fixed period by a background. Channels will also be
+    evicted if more than a configured maximum accumulate.
+
+    The default eviction period is 10 minutes. One may set the environment
+    variable "GRPC_PYTHON_MANAGED_CHANNEL_EVICTION_SECONDS" to configure this.
+
+    The default maximum number of channels is 256. One may set the
+    environment variable "GRPC_PYTHON_MANAGED_CHANNEL_MAXIMUM" to configure
+    this.
+
+    Args:
+      request_iterator: An iterator that yields request values for the RPC.
+      target: The server address.
+      method: The name of the RPC method.
+      request_serializer: Optional :term:`serializer` for serializing the request
+        message. Request goes unserialized in case None is passed.
+      response_deserializer: Optional :term:`deserializer` for deserializing the response
+        message. Response goes undeserialized in case None is passed.
+      options: An optional list of key-value pairs (:term:`channel_arguments` in gRPC Core
+        runtime) to configure the channel.
+      channel_credentials: A credential applied to the whole channel, e.g. the
+        return value of grpc.ssl_channel_credentials().
+      call_credentials: A call credential applied to each call individually,
+        e.g. the output of grpc.metadata_call_credentials() or
+        grpc.access_token_call_credentials().
+      insecure: If True, specifies channel_credentials as
+        :term:`grpc.insecure_channel_credentials()`. This option is mutually
+        exclusive with the `channel_credentials` option.
+      compression: An optional value indicating the compression method to be
+        used over the lifetime of the channel, e.g. grpc.Compression.Gzip.
+      wait_for_ready: An optional flag indicating whether the RPC should fail
+        immediately if the connection is not ready at the time the RPC is
+        invoked, or if it should wait until the connection to the server
+        becomes ready. When using this option, the user will likely also want
+        to set a timeout. Defaults to True.
+      timeout: An optional duration of time in seconds to allow for the RPC,
+        after which an exception will be raised. If timeout is unspecified,
+        defaults to a timeout controlled by the
+        GRPC_PYTHON_DEFAULT_TIMEOUT_SECONDS environment variable. If that is
+        unset, defaults to 60 seconds. Supply a value of None to indicate that
+        no timeout should be enforced.
+      metadata: Optional metadata to send to the server.
+
+    Returns:
+      An iterator of responses.
+    """
+    channel = ChannelCache.get().get_channel(target, options,
+                                             channel_credentials, insecure,
+                                             compression)
+    multicallable = channel.stream_stream(method, request_serializer,
+                                          response_deserializer)
+    wait_for_ready = wait_for_ready if wait_for_ready is not None else True
+    return multicallable(request_iterator,
+                         metadata=metadata,
+                         wait_for_ready=wait_for_ready,
+                         credentials=call_credentials,
+                         timeout=timeout)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/omegaconf/_impl.py

@@ -0,0 +1,101 @@
+from typing import Any
+
+from omegaconf import MISSING, Container, DictConfig, ListConfig, Node, ValueNode
+from omegaconf.errors import ConfigTypeError, InterpolationToMissingValueError
+
+from ._utils import _DEFAULT_MARKER_, _get_value
+
+
+def _resolve_container_value(cfg: Container, key: Any) -> None:
+    node = cfg._get_child(key)
+    assert isinstance(node, Node)
+    if node._is_interpolation():
+        try:
+            resolved = node._dereference_node()
+        except InterpolationToMissingValueError:
+            node._set_value(MISSING)
+        else:
+            if isinstance(resolved, Container):
+                _resolve(resolved)
+            if isinstance(resolved, Container) and isinstance(node, ValueNode):
+                cfg[key] = resolved
+            else:
+                node._set_value(_get_value(resolved))
+    else:
+        _resolve(node)
+
+
+def _resolve(cfg: Node) -> Node:
+    assert isinstance(cfg, Node)
+    if cfg._is_interpolation():
+        try:
+            resolved = cfg._dereference_node()
+        except InterpolationToMissingValueError:
+            cfg._set_value(MISSING)
+        else:
+            cfg._set_value(resolved._value())
+
+    if isinstance(cfg, DictConfig):
+        for k in cfg.keys():
+            _resolve_container_value(cfg, k)
+
+    elif isinstance(cfg, ListConfig):
+        for i in range(len(cfg)):
+            _resolve_container_value(cfg, i)
+
+    return cfg
+
+
+def select_value(
+    cfg: Container,
+    key: str,
+    *,
+    default: Any = _DEFAULT_MARKER_,
+    throw_on_resolution_failure: bool = True,
+    throw_on_missing: bool = False,
+    absolute_key: bool = False,
+) -> Any:
+    node = select_node(
+        cfg=cfg,
+        key=key,
+        throw_on_resolution_failure=throw_on_resolution_failure,
+        throw_on_missing=throw_on_missing,
+        absolute_key=absolute_key,
+    )
+
+    node_not_found = node is None
+    if node_not_found or node._is_missing():
+        if default is not _DEFAULT_MARKER_:
+            return default
+        else:
+            return None
+
+    return _get_value(node)
+
+
+def select_node(
+    cfg: Container,
+    key: str,
+    *,
+    throw_on_resolution_failure: bool = True,
+    throw_on_missing: bool = False,
+    absolute_key: bool = False,
+) -> Any:
+    try:
+        # for non relative keys, the interpretation can be:
+        # 1. relative to cfg
+        # 2. relative to the config root
+        # This is controlled by the absolute_key flag. By default, such keys are relative to cfg.
+        if not absolute_key and not key.startswith("."):
+            key = f".{key}"
+
+        cfg, key = cfg._resolve_key_and_root(key)
+        _root, _last_key, node = cfg._select_impl(
+            key,
+            throw_on_missing=throw_on_missing,
+            throw_on_resolution_failure=throw_on_resolution_failure,
+        )
+    except ConfigTypeError:
+        return None
+
+    return node

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/omegaconf/errors.py

@@ -0,0 +1,141 @@
+from typing import Any, Optional, Type
+
+
+class OmegaConfBaseException(Exception):
+    # would ideally be typed Optional[Node]
+    parent_node: Any
+    child_node: Any
+    key: Any
+    full_key: Optional[str]
+    value: Any
+    msg: Optional[str]
+    cause: Optional[Exception]
+    object_type: Optional[Type[Any]]
+    object_type_str: Optional[str]
+    ref_type: Optional[Type[Any]]
+    ref_type_str: Optional[str]
+
+    _initialized: bool = False
+
+    def __init__(self, *_args: Any, **_kwargs: Any) -> None:
+        self.parent_node = None
+        self.child_node = None
+        self.key = None
+        self.full_key = None
+        self.value = None
+        self.msg = None
+        self.object_type = None
+        self.ref_type = None
+
+
+class MissingMandatoryValue(OmegaConfBaseException):
+    """Thrown when a variable flagged with '???' value is accessed to
+    indicate that the value was not set"""
+
+
+class KeyValidationError(OmegaConfBaseException, ValueError):
+    """
+    Thrown when an a key of invalid type is used
+    """
+
+
+class ValidationError(OmegaConfBaseException, ValueError):
+    """
+    Thrown when a value fails validation
+    """
+
+
+class UnsupportedValueType(ValidationError, ValueError):
+    """
+    Thrown when an input value is not of supported type
+    """
+
+
+class ReadonlyConfigError(OmegaConfBaseException):
+    """
+    Thrown when someone tries to modify a frozen config
+    """
+
+
+class InterpolationResolutionError(OmegaConfBaseException, ValueError):
+    """
+    Base class for exceptions raised when resolving an interpolation.
+    """
+
+
+class UnsupportedInterpolationType(InterpolationResolutionError):
+    """
+    Thrown when an attempt to use an unregistered interpolation is made
+    """
+
+
+class InterpolationKeyError(InterpolationResolutionError):
+    """
+    Thrown when a node does not exist when resolving an interpolation.
+    """
+
+
+class InterpolationToMissingValueError(InterpolationResolutionError):
+    """
+    Thrown when a node interpolation points to a node that is set to ???.
+    """
+
+
+class InterpolationValidationError(InterpolationResolutionError, ValidationError):
+    """
+    Thrown when the result of an interpolation fails the validation step.
+    """
+
+
+class ConfigKeyError(OmegaConfBaseException, KeyError):
+    """
+    Thrown from DictConfig when a regular dict access would have caused a KeyError.
+    """
+
+    msg: str
+
+    def __init__(self, msg: str) -> None:
+        super().__init__(msg)
+        self.msg = msg
+
+    def __str__(self) -> str:
+        """
+        Workaround to nasty KeyError quirk: https://bugs.python.org/issue2651
+        """
+        return self.msg
+
+
+class ConfigAttributeError(OmegaConfBaseException, AttributeError):
+    """
+    Thrown from a config object when a regular access would have caused an AttributeError.
+    """
+
+
+class ConfigTypeError(OmegaConfBaseException, TypeError):
+    """
+    Thrown from a config object when a regular access would have caused a TypeError.
+    """
+
+
+class ConfigIndexError(OmegaConfBaseException, IndexError):
+    """
+    Thrown from a config object when a regular access would have caused an IndexError.
+    """
+
+
+class ConfigValueError(OmegaConfBaseException, ValueError):
+    """
+    Thrown from a config object when a regular access would have caused a ValueError.
+    """
+
+
+class ConfigCycleDetectedException(OmegaConfBaseException):
+    """
+    Thrown when a cycle is detected in the graph made by config nodes.
+    """
+
+
+class GrammarParseError(OmegaConfBaseException):
+    """
+    Thrown when failing to parse an expression according to the ANTLR grammar.
+    """

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/omegaconf/grammar_parser.py

@@ -0,0 +1,144 @@
+import re
+import threading
+from typing import Any
+
+from antlr4 import CommonTokenStream, InputStream, ParserRuleContext
+from antlr4.error.ErrorListener import ErrorListener
+
+from .errors import GrammarParseError
+
+# Import from visitor in order to check the presence of generated grammar files
+# files in a single place.
+from .grammar_visitor import (  # type: ignore
+    OmegaConfGrammarLexer,
+    OmegaConfGrammarParser,
+)
+
+# Used to cache grammar objects to avoid re-creating them on each call to `parse()`.
+# We use a per-thread cache to make it thread-safe.
+_grammar_cache = threading.local()
+
+# Build regex pattern to efficiently identify typical interpolations.
+# See test `test_match_simple_interpolation_pattern` for examples.
+_config_key = r"[$\w]+"  # foo, $0, $bar, $foo_$bar123$
+_key_maybe_brackets = f"{_config_key}|\\[{_config_key}\\]"  # foo, [foo], [$bar]
+_node_access = f"\\.{_key_maybe_brackets}"  # .foo, [foo], [$bar]
+_node_path = f"(\\.)*({_key_maybe_brackets})({_node_access})*"  # [foo].bar, .foo[bar]
+_node_inter = f"\\${{\\s*{_node_path}\\s*}}"  # node interpolation ${foo.bar}
+_id = "[a-zA-Z_]\\w*"  # foo, foo_bar, abc123
+_resolver_name = f"({_id}(\\.{_id})*)?"  # foo, ns.bar3, ns_1.ns_2.b0z
+_arg = r"[a-zA-Z_0-9/\-\+.$%*@?|]+"  # string representing a resolver argument
+_args = f"{_arg}(\\s*,\\s*{_arg})*"  # list of resolver arguments
+_resolver_inter = f"\\${{\\s*{_resolver_name}\\s*:\\s*{_args}?\\s*}}"  # ${foo:bar}
+_inter = f"({_node_inter}|{_resolver_inter})"  # any kind of interpolation
+_outer = "([^$]|\\$(?!{))+"  # any character except $ (unless not followed by {)
+SIMPLE_INTERPOLATION_PATTERN = re.compile(
+    f"({_outer})?({_inter}({_outer})?)+$", flags=re.ASCII
+)
+# NOTE: SIMPLE_INTERPOLATION_PATTERN must not generate false positive matches:
+# it must not accept anything that isn't a valid interpolation (per the
+# interpolation grammar defined in `omegaconf/grammar/*.g4`).
+
+
+class OmegaConfErrorListener(ErrorListener):  # type: ignore
+    def syntaxError(
+        self,
+        recognizer: Any,
+        offending_symbol: Any,
+        line: Any,
+        column: Any,
+        msg: Any,
+        e: Any,
+    ) -> None:
+        raise GrammarParseError(str(e) if msg is None else msg) from e
+
+    def reportAmbiguity(
+        self,
+        recognizer: Any,
+        dfa: Any,
+        startIndex: Any,
+        stopIndex: Any,
+        exact: Any,
+        ambigAlts: Any,
+        configs: Any,
+    ) -> None:
+        raise GrammarParseError("ANTLR error: Ambiguity")  # pragma: no cover
+
+    def reportAttemptingFullContext(
+        self,
+        recognizer: Any,
+        dfa: Any,
+        startIndex: Any,
+        stopIndex: Any,
+        conflictingAlts: Any,
+        configs: Any,
+    ) -> None:
+        # Note: for now we raise an error to be safe. However this is mostly a
+        # performance warning, so in the future this may be relaxed if we need
+        # to change the grammar in such a way that this warning cannot be
+        # avoided (another option would be to switch to SLL parsing mode).
+        raise GrammarParseError(
+            "ANTLR error: Attempting Full Context"
+        )  # pragma: no cover
+
+    def reportContextSensitivity(
+        self,
+        recognizer: Any,
+        dfa: Any,
+        startIndex: Any,
+        stopIndex: Any,
+        prediction: Any,
+        configs: Any,
+    ) -> None:
+        raise GrammarParseError("ANTLR error: ContextSensitivity")  # pragma: no cover
+
+
+def parse(
+    value: str, parser_rule: str = "configValue", lexer_mode: str = "DEFAULT_MODE"
+) -> ParserRuleContext:
+    """
+    Parse interpolated string `value` (and return the parse tree).
+    """
+    l_mode = getattr(OmegaConfGrammarLexer, lexer_mode)
+    istream = InputStream(value)
+
+    cached = getattr(_grammar_cache, "data", None)
+    if cached is None:
+        error_listener = OmegaConfErrorListener()
+        lexer = OmegaConfGrammarLexer(istream)
+        lexer.removeErrorListeners()
+        lexer.addErrorListener(error_listener)
+        lexer.mode(l_mode)
+        token_stream = CommonTokenStream(lexer)
+        parser = OmegaConfGrammarParser(token_stream)
+        parser.removeErrorListeners()
+        parser.addErrorListener(error_listener)
+
+        # The two lines below could be enabled in the future if we decide to switch
+        # to SLL prediction mode. Warning though, it has not been fully tested yet!
+        # from antlr4 import PredictionMode
+        # parser._interp.predictionMode = PredictionMode.SLL
+
+        # Note that although the input stream `istream` is implicitly cached within
+        # the lexer, it will be replaced by a new input next time the lexer is re-used.
+        _grammar_cache.data = lexer, token_stream, parser
+
+    else:
+        lexer, token_stream, parser = cached
+        # Replace the old input stream with the new one.
+        lexer.inputStream = istream
+        # Initialize the lexer / token stream / parser to process the new input.
+        lexer.mode(l_mode)
+        token_stream.setTokenSource(lexer)
+        parser.reset()
+
+    try:
+        return getattr(parser, parser_rule)()
+    except Exception as exc:
+        if type(exc) is Exception and str(exc) == "Empty Stack":
+            # This exception is raised by antlr when trying to pop a mode while
+            # no mode has been pushed. We convert it into an `GrammarParseError`
+            # to facilitate exception handling from the caller.
+            raise GrammarParseError("Empty Stack")
+        else:
+            raise

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/omegaconf/version.py

@@ -0,0 +1,13 @@
+import sys  # pragma: no cover
+
+__version__ = "2.2.3"
+
+msg = """OmegaConf 2.0 and above is compatible with Python 3.6 and newer.
+You have the following options:
+1. Upgrade to Python 3.6 or newer.
+   This is highly recommended. new features will not be added to OmegaConf 1.4.
+2. Continue using OmegaConf 1.4:
+    You can pip install 'OmegaConf<1.5' to do that.
+"""
+if sys.version_info < (3, 6):
+    raise ImportError(msg)  # pragma: no cover

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc3114.py

@@ -0,0 +1,77 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley with assistance from asn1ate v.0.6.0.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# TEST Company Classification Policies
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc3114.txt
+#
+
+from pyasn1.type import char
+from pyasn1.type import namedval
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc5755
+
+
+id_smime = univ.ObjectIdentifier((1, 2, 840, 113549, 1, 9, 16, ))
+
+id_tsp = id_smime + (7, )
+
+id_tsp_TEST_Amoco = id_tsp + (1, )
+
+class Amoco_SecurityClassification(univ.Integer):
+    namedValues = namedval.NamedValues(
+        ('amoco-general', 6),
+        ('amoco-confidential', 7),
+        ('amoco-highly-confidential', 8)
+    )
+
+
+id_tsp_TEST_Caterpillar = id_tsp + (2, )
+
+class Caterpillar_SecurityClassification(univ.Integer):
+    namedValues = namedval.NamedValues(
+        ('caterpillar-public', 6),
+        ('caterpillar-green', 7),
+        ('caterpillar-yellow', 8),
+        ('caterpillar-red', 9)
+    )
+
+
+id_tsp_TEST_Whirlpool = id_tsp + (3, )
+
+class Whirlpool_SecurityClassification(univ.Integer):
+    namedValues = namedval.NamedValues(
+        ('whirlpool-public', 6),
+        ('whirlpool-internal', 7),
+        ('whirlpool-confidential', 8)
+    )
+
+
+id_tsp_TEST_Whirlpool_Categories = id_tsp + (4, )
+
+class SecurityCategoryValues(univ.SequenceOf):
+    componentType = char.UTF8String()
+
+# Example SecurityCategoryValues: "LAW DEPARTMENT USE ONLY"
+# Example SecurityCategoryValues: "HUMAN RESOURCES USE ONLY"
+
+
+# Also, the privacy mark in the security label can contain a string,
+# such as: "ATTORNEY-CLIENT PRIVILEGED INFORMATION"
+
+
+# Map of security category type OIDs to security category added
+# to the ones that are in rfc5755.py
+
+_securityCategoryMapUpdate = {
+    id_tsp_TEST_Whirlpool_Categories: SecurityCategoryValues(),
+}
+
+rfc5755.securityCategoryMap.update(_securityCategoryMapUpdate)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc3281.py

@@ -0,0 +1,331 @@
+# coding: utf-8
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Stanisław Pitucha with asn1ate tool.
+# Copyright (c) 2005-2019, Ilya Etingof <etingof@gmail.com>
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# An Internet Attribute Certificate Profile for Authorization
+#
+# ASN.1 source from:
+# http://www.ietf.org/rfc/rfc3281.txt
+#
+from pyasn1.type import char
+from pyasn1.type import constraint
+from pyasn1.type import namedtype
+from pyasn1.type import namedval
+from pyasn1.type import tag
+from pyasn1.type import univ
+from pyasn1.type import useful
+
+from pyasn1_modules import rfc3280
+
+MAX = float('inf')
+
+
+def _buildOid(*components):
+    output = []
+    for x in tuple(components):
+        if isinstance(x, univ.ObjectIdentifier):
+            output.extend(list(x))
+        else:
+            output.append(int(x))
+
+    return univ.ObjectIdentifier(output)
+
+
+class ObjectDigestInfo(univ.Sequence):
+    pass
+
+
+ObjectDigestInfo.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('digestedObjectType', univ.Enumerated(
+        namedValues=namedval.NamedValues(('publicKey', 0), ('publicKeyCert', 1), ('otherObjectTypes', 2)))),
+    namedtype.OptionalNamedType('otherObjectTypeID', univ.ObjectIdentifier()),
+    namedtype.NamedType('digestAlgorithm', rfc3280.AlgorithmIdentifier()),
+    namedtype.NamedType('objectDigest', univ.BitString())
+)
+
+
+class IssuerSerial(univ.Sequence):
+    pass
+
+
+IssuerSerial.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('issuer', rfc3280.GeneralNames()),
+    namedtype.NamedType('serial', rfc3280.CertificateSerialNumber()),
+    namedtype.OptionalNamedType('issuerUID', rfc3280.UniqueIdentifier())
+)
+
+
+class TargetCert(univ.Sequence):
+    pass
+
+
+TargetCert.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('targetCertificate', IssuerSerial()),
+    namedtype.OptionalNamedType('targetName', rfc3280.GeneralName()),
+    namedtype.OptionalNamedType('certDigestInfo', ObjectDigestInfo())
+)
+
+
+class Target(univ.Choice):
+    pass
+
+
+Target.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('targetName', rfc3280.GeneralName().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.NamedType('targetGroup', rfc3280.GeneralName().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
+    namedtype.NamedType('targetCert',
+                        TargetCert().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 2)))
+)
+
+
+class Targets(univ.SequenceOf):
+    pass
+
+
+Targets.componentType = Target()
+
+
+class ProxyInfo(univ.SequenceOf):
+    pass
+
+
+ProxyInfo.componentType = Targets()
+
+id_at_role = _buildOid(rfc3280.id_at, 72)
+
+id_pe_aaControls = _buildOid(rfc3280.id_pe, 6)
+
+id_ce_targetInformation = _buildOid(rfc3280.id_ce, 55)
+
+id_pe_ac_auditIdentity = _buildOid(rfc3280.id_pe, 4)
+
+
+class ClassList(univ.BitString):
+    pass
+
+
+ClassList.namedValues = namedval.NamedValues(
+    ('unmarked', 0),
+    ('unclassified', 1),
+    ('restricted', 2),
+    ('confidential', 3),
+    ('secret', 4),
+    ('topSecret', 5)
+)
+
+
+class SecurityCategory(univ.Sequence):
+    pass
+
+
+SecurityCategory.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('type', univ.ObjectIdentifier().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.NamedType('value', univ.Any().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)))
+)
+
+
+class Clearance(univ.Sequence):
+    pass
+
+
+Clearance.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('policyId', univ.ObjectIdentifier().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.DefaultedNamedType('classList',
+                                 ClassList().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+                                                                         tag.tagFormatSimple, 1)).subtype(
+                                     value="unclassified")),
+    namedtype.OptionalNamedType('securityCategories', univ.SetOf(componentType=SecurityCategory()).subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)))
+)
+
+
+class AttCertVersion(univ.Integer):
+    pass
+
+
+AttCertVersion.namedValues = namedval.NamedValues(
+    ('v2', 1)
+)
+
+id_aca = _buildOid(rfc3280.id_pkix, 10)
+
+id_at_clearance = _buildOid(2, 5, 1, 5, 55)
+
+
+class AttrSpec(univ.SequenceOf):
+    pass
+
+
+AttrSpec.componentType = univ.ObjectIdentifier()
+
+
+class AAControls(univ.Sequence):
+    pass
+
+
+AAControls.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('pathLenConstraint',
+                                univ.Integer().subtype(subtypeSpec=constraint.ValueRangeConstraint(0, MAX))),
+    namedtype.OptionalNamedType('permittedAttrs',
+                                AttrSpec().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.OptionalNamedType('excludedAttrs',
+                                AttrSpec().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
+    namedtype.DefaultedNamedType('permitUnSpecified', univ.Boolean().subtype(value=1))
+)
+
+
+class AttCertValidityPeriod(univ.Sequence):
+    pass
+
+
+AttCertValidityPeriod.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('notBeforeTime', useful.GeneralizedTime()),
+    namedtype.NamedType('notAfterTime', useful.GeneralizedTime())
+)
+
+
+id_aca_authenticationInfo = _buildOid(id_aca, 1)
+
+
+class V2Form(univ.Sequence):
+    pass
+
+
+V2Form.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('issuerName', rfc3280.GeneralNames()),
+    namedtype.OptionalNamedType('baseCertificateID', IssuerSerial().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
+    namedtype.OptionalNamedType('objectDigestInfo', ObjectDigestInfo().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1)))
+)
+
+
+class AttCertIssuer(univ.Choice):
+    pass
+
+
+AttCertIssuer.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('v1Form', rfc3280.GeneralNames()),
+    namedtype.NamedType('v2Form',
+                        V2Form().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0)))
+)
+
+
+class Holder(univ.Sequence):
+    pass
+
+
+Holder.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('baseCertificateID', IssuerSerial().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
+    namedtype.OptionalNamedType('entityName', rfc3280.GeneralNames().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
+    namedtype.OptionalNamedType('objectDigestInfo', ObjectDigestInfo().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 2)))
+)
+
+
+class AttributeCertificateInfo(univ.Sequence):
+    pass
+
+
+AttributeCertificateInfo.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('version', AttCertVersion()),
+    namedtype.NamedType('holder', Holder()),
+    namedtype.NamedType('issuer', AttCertIssuer()),
+    namedtype.NamedType('signature', rfc3280.AlgorithmIdentifier()),
+    namedtype.NamedType('serialNumber', rfc3280.CertificateSerialNumber()),
+    namedtype.NamedType('attrCertValidityPeriod', AttCertValidityPeriod()),
+    namedtype.NamedType('attributes', univ.SequenceOf(componentType=rfc3280.Attribute())),
+    namedtype.OptionalNamedType('issuerUniqueID', rfc3280.UniqueIdentifier()),
+    namedtype.OptionalNamedType('extensions', rfc3280.Extensions())
+)
+
+
+class AttributeCertificate(univ.Sequence):
+    pass
+
+
+AttributeCertificate.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('acinfo', AttributeCertificateInfo()),
+    namedtype.NamedType('signatureAlgorithm', rfc3280.AlgorithmIdentifier()),
+    namedtype.NamedType('signatureValue', univ.BitString())
+)
+
+id_mod = _buildOid(rfc3280.id_pkix, 0)
+
+id_mod_attribute_cert = _buildOid(id_mod, 12)
+
+id_aca_accessIdentity = _buildOid(id_aca, 2)
+
+
+class RoleSyntax(univ.Sequence):
+    pass
+
+
+RoleSyntax.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('roleAuthority', rfc3280.GeneralNames().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.NamedType('roleName',
+                        rfc3280.GeneralName().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)))
+)
+
+id_aca_chargingIdentity = _buildOid(id_aca, 3)
+
+
+class ACClearAttrs(univ.Sequence):
+    pass
+
+
+ACClearAttrs.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('acIssuer', rfc3280.GeneralName()),
+    namedtype.NamedType('acSerial', univ.Integer()),
+    namedtype.NamedType('attrs', univ.SequenceOf(componentType=rfc3280.Attribute()))
+)
+
+id_aca_group = _buildOid(id_aca, 4)
+
+id_pe_ac_proxying = _buildOid(rfc3280.id_pe, 10)
+
+
+class SvceAuthInfo(univ.Sequence):
+    pass
+
+
+SvceAuthInfo.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('service', rfc3280.GeneralName()),
+    namedtype.NamedType('ident', rfc3280.GeneralName()),
+    namedtype.OptionalNamedType('authInfo', univ.OctetString())
+)
+
+
+class IetfAttrSyntax(univ.Sequence):
+    pass
+
+
+IetfAttrSyntax.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType(
+        'policyAuthority', rfc3280.GeneralNames().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))
+    ),
+    namedtype.NamedType(
+        'values', univ.SequenceOf(
+            componentType=univ.Choice(
+                componentType=namedtype.NamedTypes(
+                    namedtype.NamedType('octets', univ.OctetString()),
+                    namedtype.NamedType('oid', univ.ObjectIdentifier()),
+                    namedtype.NamedType('string', char.UTF8String())
+                )
+            )
+        )
+    )
+)
+
+id_aca_encAttrs = _buildOid(id_aca, 6)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc3779.py

@@ -0,0 +1,137 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley with assistance from asn1ate v.0.6.0.
+# Modified by Russ Housley to add maps for use with opentypes.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# X.509 Extensions for IP Addresses and AS Identifiers
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc3779.txt
+#
+
+from pyasn1.type import constraint
+from pyasn1.type import namedtype
+from pyasn1.type import tag
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc5280
+
+
+# IP Address Delegation Extension
+
+id_pe_ipAddrBlocks = univ.ObjectIdentifier('1.3.6.1.5.5.7.1.7')
+
+
+class IPAddress(univ.BitString):
+    pass
+
+
+class IPAddressRange(univ.Sequence):
+    pass
+
+IPAddressRange.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('min', IPAddress()),
+    namedtype.NamedType('max', IPAddress())
+)
+
+
+class IPAddressOrRange(univ.Choice):
+    pass
+
+IPAddressOrRange.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('addressPrefix', IPAddress()),
+    namedtype.NamedType('addressRange', IPAddressRange())
+)
+
+
+class IPAddressChoice(univ.Choice):
+    pass
+
+IPAddressChoice.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('inherit', univ.Null()),
+    namedtype.NamedType('addressesOrRanges', univ.SequenceOf(
+        componentType=IPAddressOrRange())
+    )
+)
+
+
+class IPAddressFamily(univ.Sequence):
+    pass
+
+IPAddressFamily.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('addressFamily', univ.OctetString().subtype(
+        subtypeSpec=constraint.ValueSizeConstraint(2, 3))),
+    namedtype.NamedType('ipAddressChoice', IPAddressChoice())
+)
+
+
+class IPAddrBlocks(univ.SequenceOf):
+    pass
+
+IPAddrBlocks.componentType = IPAddressFamily()
+
+
+# Autonomous System Identifier Delegation Extension
+
+id_pe_autonomousSysIds = univ.ObjectIdentifier('1.3.6.1.5.5.7.1.8')
+
+
+class ASId(univ.Integer):
+    pass
+
+
+class ASRange(univ.Sequence):
+    pass
+
+ASRange.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('min', ASId()),
+    namedtype.NamedType('max', ASId())
+)
+
+
+class ASIdOrRange(univ.Choice):
+    pass
+
+ASIdOrRange.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('id', ASId()),
+    namedtype.NamedType('range', ASRange())
+)
+
+
+class ASIdentifierChoice(univ.Choice):
+    pass
+
+ASIdentifierChoice.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('inherit', univ.Null()),
+    namedtype.NamedType('asIdsOrRanges', univ.SequenceOf(
+        componentType=ASIdOrRange())
+    )
+)
+
+
+class ASIdentifiers(univ.Sequence):
+    pass
+
+ASIdentifiers.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('asnum', ASIdentifierChoice().subtype(
+        explicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatConstructed, 0))),
+    namedtype.OptionalNamedType('rdi', ASIdentifierChoice().subtype(
+        explicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatConstructed, 1)))
+)
+
+
+# Map of Certificate Extension OIDs to Extensions is added to the
+# ones that are in rfc5280.py
+
+_certificateExtensionsMapUpdate = {
+    id_pe_ipAddrBlocks: IPAddrBlocks(),
+    id_pe_autonomousSysIds: ASIdentifiers(),
+}
+
+rfc5280.certificateExtensionsMap.update(_certificateExtensionsMapUpdate)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc5917.py

@@ -0,0 +1,55 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# Clearance Sponsor Attribute
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc5917.txt
+# https://www.rfc-editor.org/errata/eid4558
+# https://www.rfc-editor.org/errata/eid5883
+#
+
+from pyasn1.type import char
+from pyasn1.type import constraint
+from pyasn1.type import namedtype
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc5280
+
+
+# DirectoryString is the same as RFC 5280, except for two things:
+#   1. the length is limited to 64;
+#   2. only the 'utf8String' choice remains because the ASN.1
+#      specification says: ( WITH COMPONENTS { utf8String PRESENT } )
+
+class DirectoryString(univ.Choice):
+    componentType = namedtype.NamedTypes(
+        namedtype.NamedType('utf8String', char.UTF8String().subtype(
+            subtypeSpec=constraint.ValueSizeConstraint(1, 64))),
+    )
+
+
+# Clearance Sponsor Attribute
+
+id_clearanceSponsor = univ.ObjectIdentifier((2, 16, 840, 1, 101, 2, 1, 5, 68))
+
+ub_clearance_sponsor = univ.Integer(64)
+
+
+at_clearanceSponsor = rfc5280.Attribute()
+at_clearanceSponsor['type'] = id_clearanceSponsor
+at_clearanceSponsor['values'][0] = DirectoryString()
+
+
+# Add to the map of Attribute Type OIDs to Attributes in rfc5280.py.
+
+_certificateAttributesMapUpdate = {
+    id_clearanceSponsor: DirectoryString(),
+}
+
+rfc5280.certificateAttributesMap.update(_certificateAttributesMapUpdate)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc5934.py

@@ -0,0 +1,786 @@
+# This file is being contributed to pyasn1-modules software.
+#
+# Created by Russ Housley with assistance from asn1ate v.0.6.0.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# Trust Anchor Format
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc5934.txt
+
+from pyasn1.type import univ, char, namedtype, namedval, tag, constraint, useful
+
+from pyasn1_modules import rfc2985
+from pyasn1_modules import rfc5280
+from pyasn1_modules import rfc5652
+from pyasn1_modules import rfc5914
+
+MAX = float('inf')
+
+
+def _OID(*components):
+    output = []
+    for x in tuple(components):
+        if isinstance(x, univ.ObjectIdentifier):
+            output.extend(list(x))
+        else:
+            output.append(int(x))
+    return univ.ObjectIdentifier(output)
+
+
+# Imports from RFC 2985
+
+SingleAttribute = rfc2985.SingleAttribute
+
+
+# Imports from RFC5914
+
+CertPathControls = rfc5914.CertPathControls
+
+TrustAnchorChoice = rfc5914.TrustAnchorChoice
+
+TrustAnchorTitle = rfc5914.TrustAnchorTitle
+
+
+# Imports from RFC 5280
+
+AlgorithmIdentifier = rfc5280.AlgorithmIdentifier
+
+AnotherName = rfc5280.AnotherName
+
+Attribute = rfc5280.Attribute
+
+Certificate = rfc5280.Certificate
+
+CertificateSerialNumber = rfc5280.CertificateSerialNumber
+
+Extension = rfc5280.Extension
+
+Extensions = rfc5280.Extensions
+
+KeyIdentifier = rfc5280.KeyIdentifier
+
+Name = rfc5280.Name
+
+SubjectPublicKeyInfo = rfc5280.SubjectPublicKeyInfo
+
+TBSCertificate = rfc5280.TBSCertificate
+
+Validity = rfc5280.Validity
+
+
+# Object Identifier Arc for TAMP Message Content Types
+
+id_tamp = univ.ObjectIdentifier('2.16.840.1.101.2.1.2.77')
+
+
+# TAMP Status Query Message
+
+id_ct_TAMP_statusQuery = _OID(id_tamp, 1)
+
+
+class TAMPVersion(univ.Integer):
+    pass
+
+TAMPVersion.namedValues = namedval.NamedValues(
+    ('v1', 1),
+    ('v2', 2)
+)
+
+
+class TerseOrVerbose(univ.Enumerated):
+    pass
+
+TerseOrVerbose.namedValues = namedval.NamedValues(
+    ('terse', 1),
+    ('verbose', 2)
+)
+
+
+class HardwareSerialEntry(univ.Choice):
+    pass
+
+HardwareSerialEntry.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('all', univ.Null()),
+    namedtype.NamedType('single', univ.OctetString()),
+    namedtype.NamedType('block', univ.Sequence(componentType=namedtype.NamedTypes(
+        namedtype.NamedType('low', univ.OctetString()),
+        namedtype.NamedType('high', univ.OctetString())
+    ))
+    )
+)
+
+
+class HardwareModules(univ.Sequence):
+    pass
+
+HardwareModules.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('hwType', univ.ObjectIdentifier()),
+    namedtype.NamedType('hwSerialEntries', univ.SequenceOf(
+        componentType=HardwareSerialEntry()).subtype(
+        subtypeSpec=constraint.ValueSizeConstraint(1, MAX)))
+)
+
+
+class HardwareModuleIdentifierList(univ.SequenceOf):
+    pass
+
+HardwareModuleIdentifierList.componentType = HardwareModules()
+HardwareModuleIdentifierList.subtypeSpec=constraint.ValueSizeConstraint(1, MAX)
+
+
+class Community(univ.ObjectIdentifier):
+    pass
+
+
+class CommunityIdentifierList(univ.SequenceOf):
+    pass
+
+CommunityIdentifierList.componentType = Community()
+CommunityIdentifierList.subtypeSpec=constraint.ValueSizeConstraint(0, MAX)
+
+
+class TargetIdentifier(univ.Choice):
+    pass
+
+TargetIdentifier.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('hwModules', HardwareModuleIdentifierList().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
+    namedtype.NamedType('communities', CommunityIdentifierList().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))),
+    namedtype.NamedType('allModules', univ.Null().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 3))),
+    namedtype.NamedType('uri', char.IA5String().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 4))),
+    namedtype.NamedType('otherName', AnotherName().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 5)))
+)
+
+
+class SeqNumber(univ.Integer):
+    pass
+
+SeqNumber.subtypeSpec = constraint.ValueRangeConstraint(0, 9223372036854775807)
+
+
+class TAMPMsgRef(univ.Sequence):
+    pass
+
+TAMPMsgRef.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('target', TargetIdentifier()),
+    namedtype.NamedType('seqNum', SeqNumber())
+)
+
+
+class TAMPStatusQuery(univ.Sequence):
+    pass
+
+TAMPStatusQuery.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version', TAMPVersion().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.DefaultedNamedType('terse', TerseOrVerbose().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 1)).subtype(value='verbose')),
+    namedtype.NamedType('query', TAMPMsgRef())
+)
+
+
+tamp_status_query = rfc5652.ContentInfo()
+tamp_status_query['contentType'] = id_ct_TAMP_statusQuery
+tamp_status_query['content'] = TAMPStatusQuery()
+
+
+# TAMP Status Response Message
+
+id_ct_TAMP_statusResponse = _OID(id_tamp, 2)
+
+
+class KeyIdentifiers(univ.SequenceOf):
+    pass
+
+KeyIdentifiers.componentType = KeyIdentifier()
+KeyIdentifiers.subtypeSpec=constraint.ValueSizeConstraint(1, MAX)
+
+
+class TrustAnchorChoiceList(univ.SequenceOf):
+    pass
+
+TrustAnchorChoiceList.componentType = TrustAnchorChoice()
+TrustAnchorChoiceList.subtypeSpec=constraint.ValueSizeConstraint(1, MAX)
+
+
+class TAMPSequenceNumber(univ.Sequence):
+    pass
+
+TAMPSequenceNumber.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('keyId', KeyIdentifier()),
+    namedtype.NamedType('seqNumber', SeqNumber())
+)
+
+
+class TAMPSequenceNumbers(univ.SequenceOf):
+    pass
+
+TAMPSequenceNumbers.componentType = TAMPSequenceNumber()
+TAMPSequenceNumbers.subtypeSpec=constraint.ValueSizeConstraint(1, MAX)
+
+
+class TerseStatusResponse(univ.Sequence):
+    pass
+
+TerseStatusResponse.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('taKeyIds', KeyIdentifiers()),
+    namedtype.OptionalNamedType('communities', CommunityIdentifierList())
+)
+
+
+class VerboseStatusResponse(univ.Sequence):
+    pass
+
+VerboseStatusResponse.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('taInfo', TrustAnchorChoiceList()),
+    namedtype.OptionalNamedType('continPubKeyDecryptAlg',
+        AlgorithmIdentifier().subtype(implicitTag=tag.Tag(
+        tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.OptionalNamedType('communities',
+        CommunityIdentifierList().subtype(implicitTag=tag.Tag(
+        tag.tagClassContext, tag.tagFormatSimple, 1))),
+    namedtype.OptionalNamedType('tampSeqNumbers',
+        TAMPSequenceNumbers().subtype(implicitTag=tag.Tag(
+        tag.tagClassContext, tag.tagFormatSimple, 2)))
+)
+
+
+class StatusResponse(univ.Choice):
+    pass
+
+StatusResponse.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('terseResponse', TerseStatusResponse().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
+    namedtype.NamedType('verboseResponse', VerboseStatusResponse().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1)))
+)
+
+
+class TAMPStatusResponse(univ.Sequence):
+    pass
+
+TAMPStatusResponse.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version', TAMPVersion().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.NamedType('query', TAMPMsgRef()),
+    namedtype.NamedType('response', StatusResponse()),
+    namedtype.DefaultedNamedType('usesApex', univ.Boolean().subtype(value=1))
+)
+
+
+tamp_status_response = rfc5652.ContentInfo()
+tamp_status_response['contentType'] = id_ct_TAMP_statusResponse
+tamp_status_response['content'] = TAMPStatusResponse()
+
+
+# Trust Anchor Update Message
+
+id_ct_TAMP_update = _OID(id_tamp, 3)
+
+
+class TBSCertificateChangeInfo(univ.Sequence):
+    pass
+
+TBSCertificateChangeInfo.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('serialNumber', CertificateSerialNumber()),
+    namedtype.OptionalNamedType('signature', AlgorithmIdentifier().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.OptionalNamedType('issuer', Name().subtype(implicitTag=tag.Tag(
+        tag.tagClassContext, tag.tagFormatSimple, 1))),
+    namedtype.OptionalNamedType('validity', Validity().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))),
+    namedtype.OptionalNamedType('subject', Name().subtype(implicitTag=tag.Tag(
+        tag.tagClassContext, tag.tagFormatSimple, 3))),
+    namedtype.NamedType('subjectPublicKeyInfo', SubjectPublicKeyInfo().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 4))),
+    namedtype.OptionalNamedType('exts', Extensions().subtype(explicitTag=tag.Tag(
+        tag.tagClassContext, tag.tagFormatSimple, 5)))
+)
+
+
+class TrustAnchorChangeInfo(univ.Sequence):
+    pass
+
+TrustAnchorChangeInfo.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('pubKey', SubjectPublicKeyInfo()),
+    namedtype.OptionalNamedType('keyId', KeyIdentifier()),
+    namedtype.OptionalNamedType('taTitle', TrustAnchorTitle()),
+    namedtype.OptionalNamedType('certPath', CertPathControls()),
+    namedtype.OptionalNamedType('exts', Extensions().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)))
+)
+
+
+class TrustAnchorChangeInfoChoice(univ.Choice):
+    pass
+
+TrustAnchorChangeInfoChoice.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('tbsCertChange', TBSCertificateChangeInfo().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
+    namedtype.NamedType('taChange', TrustAnchorChangeInfo().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1)))
+)
+
+
+class TrustAnchorUpdate(univ.Choice):
+    pass
+
+TrustAnchorUpdate.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('add', TrustAnchorChoice().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
+    namedtype.NamedType('remove', SubjectPublicKeyInfo().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))),
+    namedtype.NamedType('change', TrustAnchorChangeInfoChoice().subtype(
+        explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 3)))
+)
+
+
+class TAMPUpdate(univ.Sequence):
+    pass
+
+TAMPUpdate.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version',
+        TAMPVersion().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.DefaultedNamedType('terse',
+        TerseOrVerbose().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 1)).subtype(value='verbose')),
+    namedtype.NamedType('msgRef', TAMPMsgRef()),
+    namedtype.NamedType('updates',
+        univ.SequenceOf(componentType=TrustAnchorUpdate()).subtype(
+        subtypeSpec=constraint.ValueSizeConstraint(1, MAX))),
+    namedtype.OptionalNamedType('tampSeqNumbers',
+        TAMPSequenceNumbers().subtype(implicitTag=tag.Tag(
+        tag.tagClassContext, tag.tagFormatSimple, 2)))
+)
+
+
+tamp_update = rfc5652.ContentInfo()
+tamp_update['contentType'] = id_ct_TAMP_update
+tamp_update['content'] = TAMPUpdate()
+
+
+# Trust Anchor Update Confirm Message
+
+id_ct_TAMP_updateConfirm = _OID(id_tamp, 4)
+
+
+class StatusCode(univ.Enumerated):
+    pass
+
+StatusCode.namedValues = namedval.NamedValues(
+    ('success', 0),
+    ('decodeFailure', 1),
+    ('badContentInfo', 2),
+    ('badSignedData', 3),
+    ('badEncapContent', 4),
+    ('badCertificate', 5),
+    ('badSignerInfo', 6),
+    ('badSignedAttrs', 7),
+    ('badUnsignedAttrs', 8),
+    ('missingContent', 9),
+    ('noTrustAnchor', 10),
+    ('notAuthorized', 11),
+    ('badDigestAlgorithm', 12),
+    ('badSignatureAlgorithm', 13),
+    ('unsupportedKeySize', 14),
+    ('unsupportedParameters', 15),
+    ('signatureFailure', 16),
+    ('insufficientMemory', 17),
+    ('unsupportedTAMPMsgType', 18),
+    ('apexTAMPAnchor', 19),
+    ('improperTAAddition', 20),
+    ('seqNumFailure', 21),
+    ('contingencyPublicKeyDecrypt', 22),
+    ('incorrectTarget', 23),
+    ('communityUpdateFailed', 24),
+    ('trustAnchorNotFound', 25),
+    ('unsupportedTAAlgorithm', 26),
+    ('unsupportedTAKeySize', 27),
+    ('unsupportedContinPubKeyDecryptAlg', 28),
+    ('missingSignature', 29),
+    ('resourcesBusy', 30),
+    ('versionNumberMismatch', 31),
+    ('missingPolicySet', 32),
+    ('revokedCertificate', 33),
+    ('unsupportedTrustAnchorFormat', 34),
+    ('improperTAChange', 35),
+    ('malformed', 36),
+    ('cmsError', 37),
+    ('unsupportedTargetIdentifier', 38),
+    ('other', 127)
+)
+
+
+class StatusCodeList(univ.SequenceOf):
+    pass
+
+StatusCodeList.componentType = StatusCode()
+StatusCodeList.subtypeSpec=constraint.ValueSizeConstraint(1, MAX)
+
+
+class TerseUpdateConfirm(StatusCodeList):
+    pass
+
+
+class VerboseUpdateConfirm(univ.Sequence):
+    pass
+
+VerboseUpdateConfirm.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('status', StatusCodeList()),
+    namedtype.NamedType('taInfo', TrustAnchorChoiceList()),
+    namedtype.OptionalNamedType('tampSeqNumbers', TAMPSequenceNumbers()),
+    namedtype.DefaultedNamedType('usesApex', univ.Boolean().subtype(value=1))
+)
+
+
+class UpdateConfirm(univ.Choice):
+    pass
+
+UpdateConfirm.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('terseConfirm', TerseUpdateConfirm().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.NamedType('verboseConfirm', VerboseUpdateConfirm().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1)))
+)
+
+
+class TAMPUpdateConfirm(univ.Sequence):
+    pass
+
+TAMPUpdateConfirm.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version', TAMPVersion().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.NamedType('update', TAMPMsgRef()),
+    namedtype.NamedType('confirm', UpdateConfirm())
+)
+
+
+tamp_update_confirm = rfc5652.ContentInfo()
+tamp_update_confirm['contentType'] = id_ct_TAMP_updateConfirm
+tamp_update_confirm['content'] = TAMPUpdateConfirm()
+
+
+# Apex Trust Anchor Update Message
+
+id_ct_TAMP_apexUpdate = _OID(id_tamp, 5)
+
+
+class TAMPApexUpdate(univ.Sequence):
+    pass
+
+TAMPApexUpdate.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version',
+        TAMPVersion().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.DefaultedNamedType('terse',
+        TerseOrVerbose().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 1)).subtype(value='verbose')),
+    namedtype.NamedType('msgRef', TAMPMsgRef()),
+    namedtype.NamedType('clearTrustAnchors', univ.Boolean()),
+    namedtype.NamedType('clearCommunities', univ.Boolean()),
+    namedtype.OptionalNamedType('seqNumber', SeqNumber()),
+    namedtype.NamedType('apexTA', TrustAnchorChoice())
+)
+
+
+tamp_apex_update = rfc5652.ContentInfo()
+tamp_apex_update['contentType'] = id_ct_TAMP_apexUpdate
+tamp_apex_update['content'] = TAMPApexUpdate()
+
+
+# Apex Trust Anchor Update Confirm Message
+
+id_ct_TAMP_apexUpdateConfirm = _OID(id_tamp, 6)
+
+
+class TerseApexUpdateConfirm(StatusCode):
+    pass
+
+
+class VerboseApexUpdateConfirm(univ.Sequence):
+    pass
+
+VerboseApexUpdateConfirm.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('status', StatusCode()),
+    namedtype.NamedType('taInfo', TrustAnchorChoiceList()),
+    namedtype.OptionalNamedType('communities',
+        CommunityIdentifierList().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0))),
+    namedtype.OptionalNamedType('tampSeqNumbers',
+        TAMPSequenceNumbers().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 1)))
+)
+
+
+class ApexUpdateConfirm(univ.Choice):
+    pass
+
+ApexUpdateConfirm.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('terseApexConfirm',
+        TerseApexUpdateConfirm().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0))),
+    namedtype.NamedType('verboseApexConfirm',
+        VerboseApexUpdateConfirm().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatConstructed, 1)))
+)
+
+
+class TAMPApexUpdateConfirm(univ.Sequence):
+    pass
+
+TAMPApexUpdateConfirm.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version',
+        TAMPVersion().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.NamedType('apexReplace', TAMPMsgRef()),
+    namedtype.NamedType('apexConfirm', ApexUpdateConfirm())
+)
+
+
+tamp_apex_update_confirm = rfc5652.ContentInfo()
+tamp_apex_update_confirm['contentType'] = id_ct_TAMP_apexUpdateConfirm
+tamp_apex_update_confirm['content'] = TAMPApexUpdateConfirm()
+
+
+# Community Update Message
+
+id_ct_TAMP_communityUpdate = _OID(id_tamp, 7)
+
+
+class CommunityUpdates(univ.Sequence):
+    pass
+
+CommunityUpdates.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('remove',
+        CommunityIdentifierList().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 1))),
+    namedtype.OptionalNamedType('add',
+        CommunityIdentifierList().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 2)))
+)
+
+
+class TAMPCommunityUpdate(univ.Sequence):
+    pass
+
+TAMPCommunityUpdate.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version',
+        TAMPVersion().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.DefaultedNamedType('terse',
+        TerseOrVerbose().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 1)).subtype(value='verbose')),
+    namedtype.NamedType('msgRef', TAMPMsgRef()),
+    namedtype.NamedType('updates', CommunityUpdates())
+)
+
+
+tamp_community_update = rfc5652.ContentInfo()
+tamp_community_update['contentType'] = id_ct_TAMP_communityUpdate
+tamp_community_update['content'] = TAMPCommunityUpdate()
+
+
+# Community Update Confirm Message
+
+id_ct_TAMP_communityUpdateConfirm = _OID(id_tamp, 8)
+
+
+class TerseCommunityConfirm(StatusCode):
+    pass
+
+
+class VerboseCommunityConfirm(univ.Sequence):
+    pass
+
+VerboseCommunityConfirm.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('status', StatusCode()),
+    namedtype.OptionalNamedType('communities', CommunityIdentifierList())
+)
+
+
+class CommunityConfirm(univ.Choice):
+    pass
+
+CommunityConfirm.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('terseCommConfirm',
+        TerseCommunityConfirm().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0))),
+    namedtype.NamedType('verboseCommConfirm',
+        VerboseCommunityConfirm().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatConstructed, 1)))
+)
+
+
+class TAMPCommunityUpdateConfirm(univ.Sequence):
+    pass
+
+TAMPCommunityUpdateConfirm.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version',
+        TAMPVersion().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.NamedType('update', TAMPMsgRef()),
+    namedtype.NamedType('commConfirm', CommunityConfirm())
+)
+
+
+tamp_community_update_confirm = rfc5652.ContentInfo()
+tamp_community_update_confirm['contentType'] = id_ct_TAMP_communityUpdateConfirm
+tamp_community_update_confirm['content'] = TAMPCommunityUpdateConfirm()
+
+
+# Sequence Number Adjust Message
+
+id_ct_TAMP_seqNumAdjust = _OID(id_tamp, 10)
+
+
+
+class SequenceNumberAdjust(univ.Sequence):
+    pass
+
+SequenceNumberAdjust.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version',
+        TAMPVersion().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.NamedType('msgRef', TAMPMsgRef())
+)
+
+
+tamp_sequence_number_adjust = rfc5652.ContentInfo()
+tamp_sequence_number_adjust['contentType'] = id_ct_TAMP_seqNumAdjust
+tamp_sequence_number_adjust['content'] = SequenceNumberAdjust()
+
+
+# Sequence Number Adjust Confirm Message
+
+id_ct_TAMP_seqNumAdjustConfirm = _OID(id_tamp, 11)
+
+
+class SequenceNumberAdjustConfirm(univ.Sequence):
+    pass
+
+SequenceNumberAdjustConfirm.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version',
+        TAMPVersion().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.NamedType('adjust', TAMPMsgRef()),
+    namedtype.NamedType('status', StatusCode())
+)
+
+
+tamp_sequence_number_adjust_confirm = rfc5652.ContentInfo()
+tamp_sequence_number_adjust_confirm['contentType'] = id_ct_TAMP_seqNumAdjustConfirm
+tamp_sequence_number_adjust_confirm['content'] = SequenceNumberAdjustConfirm()
+
+
+# TAMP Error Message
+
+id_ct_TAMP_error = _OID(id_tamp, 9)
+
+
+class TAMPError(univ.Sequence):
+    pass
+
+TAMPError.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version',
+        TAMPVersion().subtype(implicitTag=tag.Tag(tag.tagClassContext,
+        tag.tagFormatSimple, 0)).subtype(value='v2')),
+    namedtype.NamedType('msgType', univ.ObjectIdentifier()),
+    namedtype.NamedType('status', StatusCode()),
+    namedtype.OptionalNamedType('msgRef', TAMPMsgRef())
+)
+
+
+tamp_error = rfc5652.ContentInfo()
+tamp_error['contentType'] = id_ct_TAMP_error
+tamp_error['content'] = TAMPError()
+
+
+# Object Identifier Arc for Attributes
+
+id_attributes = univ.ObjectIdentifier('2.16.840.1.101.2.1.5')
+
+
+# contingency-public-key-decrypt-key unsigned attribute
+
+id_aa_TAMP_contingencyPublicKeyDecryptKey = _OID(id_attributes, 63)
+
+
+class PlaintextSymmetricKey(univ.OctetString):
+    pass
+
+
+contingency_public_key_decrypt_key = Attribute()
+contingency_public_key_decrypt_key['type'] = id_aa_TAMP_contingencyPublicKeyDecryptKey
+contingency_public_key_decrypt_key['values'][0] = PlaintextSymmetricKey()
+
+
+# id-pe-wrappedApexContinKey extension
+
+id_pe_wrappedApexContinKey =univ.ObjectIdentifier('1.3.6.1.5.5.7.1.20')
+
+
+class ApexContingencyKey(univ.Sequence):
+    pass
+
+ApexContingencyKey.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('wrapAlgorithm', AlgorithmIdentifier()),
+    namedtype.NamedType('wrappedContinPubKey', univ.OctetString())
+)
+
+
+wrappedApexContinKey = Extension()
+wrappedApexContinKey['extnID'] = id_pe_wrappedApexContinKey
+wrappedApexContinKey['critical'] = 0
+wrappedApexContinKey['extnValue'] = univ.OctetString()
+
+
+# Add to the map of CMS Content Type OIDs to Content Types in
+# rfc5652.py
+
+_cmsContentTypesMapUpdate = {
+    id_ct_TAMP_statusQuery: TAMPStatusQuery(),
+    id_ct_TAMP_statusResponse: TAMPStatusResponse(),
+    id_ct_TAMP_update: TAMPUpdate(),
+    id_ct_TAMP_updateConfirm: TAMPUpdateConfirm(),
+    id_ct_TAMP_apexUpdate: TAMPApexUpdate(),
+    id_ct_TAMP_apexUpdateConfirm: TAMPApexUpdateConfirm(),
+    id_ct_TAMP_communityUpdate: TAMPCommunityUpdate(),
+    id_ct_TAMP_communityUpdateConfirm: TAMPCommunityUpdateConfirm(),
+    id_ct_TAMP_seqNumAdjust: SequenceNumberAdjust(),
+    id_ct_TAMP_seqNumAdjustConfirm: SequenceNumberAdjustConfirm(),
+    id_ct_TAMP_error: TAMPError(),
+}
+
+rfc5652.cmsContentTypesMap.update(_cmsContentTypesMapUpdate)
+
+
+# Add to the map of CMS Attribute OIDs to Attribute Values in
+# rfc5652.py
+
+_cmsAttributesMapUpdate = {
+    id_aa_TAMP_contingencyPublicKeyDecryptKey: PlaintextSymmetricKey(),
+}
+
+rfc5652.cmsAttributesMap.update(_cmsAttributesMapUpdate)
+
+
+# Add to the map of Certificate Extension OIDs to Extensions in
+# rfc5280.py
+
+_certificateExtensionsMap = {
+    id_pe_wrappedApexContinKey: ApexContingencyKey(),
+}
+
+rfc5280.certificateExtensionsMap.update(_certificateExtensionsMap)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc5940.py

@@ -0,0 +1,59 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley with assistance from asn1ate v.0.6.0.
+# Modified by Russ Housley to add map for use with opentypes.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# Additional CMS Revocation Information Choices
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc5940.txt
+#
+
+from pyasn1.type import namedtype
+from pyasn1.type import tag
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc2560
+from pyasn1_modules import rfc5652
+
+
+# RevocationInfoChoice for OCSP response:
+# The OID is included in otherRevInfoFormat, and
+# signed OCSPResponse is included in otherRevInfo
+
+id_ri_ocsp_response = univ.ObjectIdentifier('1.3.6.1.5.5.7.16.2')
+
+OCSPResponse = rfc2560.OCSPResponse
+
+
+# RevocationInfoChoice for SCVP request/response:
+# The OID is included in otherRevInfoFormat, and
+# SCVPReqRes is included in otherRevInfo
+
+id_ri_scvp = univ.ObjectIdentifier('1.3.6.1.5.5.7.16.4')
+
+ContentInfo = rfc5652.ContentInfo
+
+class SCVPReqRes(univ.Sequence):
+    pass
+
+SCVPReqRes.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('request',
+        ContentInfo().subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.NamedType('response', ContentInfo())
+)
+
+
+# Map of Revocation Info Format OIDs to Revocation Info Format
+# is added to the ones that are in rfc5652.py
+
+_otherRevInfoFormatMapUpdate = {
+     id_ri_ocsp_response: OCSPResponse(),
+     id_ri_scvp: SCVPReqRes(),
+}
+
+rfc5652.otherRevInfoFormatMap.update(_otherRevInfoFormatMapUpdate)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc6031.py

@@ -0,0 +1,469 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley with assistance from asn1ate v.0.6.0.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# CMS Symmetric Key Package Content Type
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc6031.txt
+#
+
+from pyasn1.type import char
+from pyasn1.type import constraint
+from pyasn1.type import namedtype
+from pyasn1.type import namedval
+from pyasn1.type import opentype
+from pyasn1.type import tag
+from pyasn1.type import univ
+from pyasn1.type import useful
+
+from pyasn1_modules import rfc5652
+from pyasn1_modules import rfc6019
+
+
+def _OID(*components):
+    output = []
+    for x in tuple(components):
+        if isinstance(x, univ.ObjectIdentifier):
+            output.extend(list(x))
+        else:
+            output.append(int(x))
+    return univ.ObjectIdentifier(output)
+
+
+MAX = float('inf')
+
+id_pskc = univ.ObjectIdentifier('1.2.840.113549.1.9.16.12')
+
+
+# Symmetric Key Package Attributes
+
+id_pskc_manufacturer = _OID(id_pskc, 1)
+
+class at_pskc_manufacturer(char.UTF8String):
+    pass
+
+
+id_pskc_serialNo = _OID(id_pskc, 2)
+
+class at_pskc_serialNo(char.UTF8String):
+    pass
+
+
+id_pskc_model = _OID(id_pskc, 3)
+
+class at_pskc_model(char.UTF8String):
+    pass
+
+
+id_pskc_issueNo = _OID(id_pskc, 4)
+
+class at_pskc_issueNo(char.UTF8String):
+    pass
+
+
+id_pskc_deviceBinding = _OID(id_pskc, 5)
+
+class at_pskc_deviceBinding(char.UTF8String):
+    pass
+
+
+id_pskc_deviceStartDate = _OID(id_pskc, 6)
+
+class at_pskc_deviceStartDate(useful.GeneralizedTime):
+    pass
+
+
+id_pskc_deviceExpiryDate = _OID(id_pskc, 7)
+
+class at_pskc_deviceExpiryDate(useful.GeneralizedTime):
+    pass
+
+
+id_pskc_moduleId = _OID(id_pskc, 8)
+
+class at_pskc_moduleId(char.UTF8String):
+    pass
+
+
+id_pskc_deviceUserId = _OID(id_pskc, 26)
+
+class at_pskc_deviceUserId(char.UTF8String):
+    pass
+
+
+# Symmetric Key Attributes
+
+id_pskc_keyId = _OID(id_pskc, 9)
+
+class at_pskc_keyUserId(char.UTF8String):
+    pass
+
+
+id_pskc_algorithm = _OID(id_pskc, 10)
+
+class at_pskc_algorithm(char.UTF8String):
+    pass
+
+
+id_pskc_issuer = _OID(id_pskc, 11)
+
+class at_pskc_issuer(char.UTF8String):
+    pass
+
+
+id_pskc_keyProfileId = _OID(id_pskc, 12)
+
+class at_pskc_keyProfileId(char.UTF8String):
+    pass
+
+
+id_pskc_keyReference = _OID(id_pskc, 13)
+
+class at_pskc_keyReference(char.UTF8String):
+    pass
+
+
+id_pskc_friendlyName = _OID(id_pskc, 14)
+
+class FriendlyName(univ.Sequence):
+    pass
+
+FriendlyName.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('friendlyName', char.UTF8String()),
+    namedtype.OptionalNamedType('friendlyNameLangTag', char.UTF8String())
+)
+
+class at_pskc_friendlyName(FriendlyName):
+    pass
+
+
+id_pskc_algorithmParameters = _OID(id_pskc, 15)
+
+class Encoding(char.UTF8String):
+    pass
+
+Encoding.namedValues = namedval.NamedValues(
+    ('dec',   "DECIMAL"),
+    ('hex',   "HEXADECIMAL"),
+    ('alpha', "ALPHANUMERIC"),
+    ('b64',   "BASE64"),
+    ('bin',   "BINARY")
+)
+
+Encoding.subtypeSpec = constraint.SingleValueConstraint(
+    "DECIMAL", "HEXADECIMAL", "ALPHANUMERIC", "BASE64", "BINARY" )
+
+class ChallengeFormat(univ.Sequence):
+    pass
+
+ChallengeFormat.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('encoding', Encoding()),
+    namedtype.DefaultedNamedType('checkDigit',
+        univ.Boolean().subtype(value=0)),
+    namedtype.NamedType('min', univ.Integer().subtype(
+        subtypeSpec=constraint.ValueRangeConstraint(0, MAX))),
+    namedtype.NamedType('max', univ.Integer().subtype(
+        subtypeSpec=constraint.ValueRangeConstraint(0, MAX)))
+)
+
+class ResponseFormat(univ.Sequence):
+    pass
+
+ResponseFormat.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('encoding', Encoding()),
+    namedtype.NamedType('length', univ.Integer().subtype(
+        subtypeSpec=constraint.ValueRangeConstraint(0, MAX))),
+    namedtype.DefaultedNamedType('checkDigit',
+        univ.Boolean().subtype(value=0))
+)
+
+class PSKCAlgorithmParameters(univ.Choice):
+    pass
+
+PSKCAlgorithmParameters.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('suite', char.UTF8String()),
+    namedtype.NamedType('challengeFormat', ChallengeFormat().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
+    namedtype.NamedType('responseFormat', ResponseFormat().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1)))
+)
+
+class at_pskc_algorithmParameters(PSKCAlgorithmParameters):
+    pass
+
+
+id_pskc_counter = _OID(id_pskc, 16)
+
+class at_pskc_counter(univ.Integer):
+    pass
+
+at_pskc_counter.subtypeSpec = constraint.ValueRangeConstraint(0, MAX)
+
+
+id_pskc_time = _OID(id_pskc, 17)
+
+class at_pskc_time(rfc6019.BinaryTime):
+    pass
+
+
+id_pskc_timeInterval = _OID(id_pskc, 18)
+
+class at_pskc_timeInterval(univ.Integer):
+    pass
+
+at_pskc_timeInterval.subtypeSpec = constraint.ValueRangeConstraint(0, MAX)
+
+
+id_pskc_timeDrift = _OID(id_pskc, 19)
+
+class at_pskc_timeDrift(univ.Integer):
+    pass
+
+at_pskc_timeDrift.subtypeSpec = constraint.ValueRangeConstraint(0, MAX)
+
+
+id_pskc_valueMAC = _OID(id_pskc, 20)
+
+class ValueMac(univ.Sequence):
+    pass
+
+ValueMac.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('macAlgorithm', char.UTF8String()),
+    namedtype.NamedType('mac', char.UTF8String())
+)
+
+class at_pskc_valueMAC(ValueMac):
+    pass
+
+
+id_pskc_keyUserId = _OID(id_pskc, 27)
+
+class at_pskc_keyId(char.UTF8String):
+    pass
+
+
+id_pskc_keyStartDate = _OID(id_pskc, 21)
+
+class at_pskc_keyStartDate(useful.GeneralizedTime):
+    pass
+
+
+id_pskc_keyExpiryDate = _OID(id_pskc, 22)
+
+class at_pskc_keyExpiryDate(useful.GeneralizedTime):
+    pass
+
+
+id_pskc_numberOfTransactions = _OID(id_pskc, 23)
+
+class at_pskc_numberOfTransactions(univ.Integer):
+    pass
+    
+at_pskc_numberOfTransactions.subtypeSpec = constraint.ValueRangeConstraint(0, MAX)
+
+
+id_pskc_keyUsages = _OID(id_pskc, 24)
+
+class PSKCKeyUsage(char.UTF8String):
+    pass
+
+PSKCKeyUsage.namedValues = namedval.NamedValues(
+    ('otp',       "OTP"),
+    ('cr',        "CR"),
+    ('encrypt',   "Encrypt"),
+    ('integrity', "Integrity"),
+    ('verify',    "Verify"),
+    ('unlock',    "Unlock"),
+    ('decrypt',   "Decrypt"),
+    ('keywrap',   "KeyWrap"),
+    ('unwrap',    "Unwrap"),
+    ('derive',    "Derive"),
+    ('generate',  "Generate")
+)
+
+PSKCKeyUsage.subtypeSpec = constraint.SingleValueConstraint(
+    "OTP", "CR", "Encrypt", "Integrity", "Verify", "Unlock",
+    "Decrypt", "KeyWrap", "Unwrap", "Derive", "Generate" )
+
+class PSKCKeyUsages(univ.SequenceOf):
+    pass
+
+PSKCKeyUsages.componentType = PSKCKeyUsage()
+
+class at_pskc_keyUsage(PSKCKeyUsages):
+    pass
+
+
+id_pskc_pinPolicy = _OID(id_pskc, 25)
+
+class PINUsageMode(char.UTF8String):
+    pass
+
+PINUsageMode.namedValues = namedval.NamedValues(
+    ("local",       "Local"),
+    ("prepend",     "Prepend"),
+    ("append",      "Append"),
+    ("algorithmic", "Algorithmic")
+)
+
+PINUsageMode.subtypeSpec = constraint.SingleValueConstraint(
+    "Local", "Prepend", "Append", "Algorithmic" )
+
+class PINPolicy(univ.Sequence):
+    pass
+
+PINPolicy.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('pinKeyId', char.UTF8String().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.NamedType('pinUsageMode', PINUsageMode().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
+    namedtype.OptionalNamedType('maxFailedAttempts', univ.Integer().subtype(
+        subtypeSpec=constraint.ValueRangeConstraint(0, MAX)).subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))),
+    namedtype.OptionalNamedType('minLength', univ.Integer().subtype(
+        subtypeSpec=constraint.ValueRangeConstraint(0, MAX)).subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 3))),
+    namedtype.OptionalNamedType('maxLength', univ.Integer().subtype(
+        subtypeSpec=constraint.ValueRangeConstraint(0, MAX)).subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 4))),
+    namedtype.OptionalNamedType('pinEncoding', Encoding().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 5)))
+)
+
+class at_pskc_pinPolicy(PINPolicy):
+    pass
+
+
+# Map of Symmetric Key Package Attribute OIDs to Attributes
+
+sKeyPkgAttributesMap = {
+     id_pskc_manufacturer: at_pskc_manufacturer(),
+     id_pskc_serialNo: at_pskc_serialNo(),
+     id_pskc_model: at_pskc_model(),
+     id_pskc_issueNo: at_pskc_issueNo(),
+     id_pskc_deviceBinding: at_pskc_deviceBinding(),
+     id_pskc_deviceStartDate: at_pskc_deviceStartDate(),
+     id_pskc_deviceExpiryDate: at_pskc_deviceExpiryDate(),
+     id_pskc_moduleId: at_pskc_moduleId(),
+     id_pskc_deviceUserId: at_pskc_deviceUserId(),
+}
+
+
+# Map of Symmetric Key Attribute OIDs to Attributes
+
+sKeyAttributesMap = {
+     id_pskc_keyId: at_pskc_keyId(),
+     id_pskc_algorithm: at_pskc_algorithm(),
+     id_pskc_issuer: at_pskc_issuer(),
+     id_pskc_keyProfileId: at_pskc_keyProfileId(),
+     id_pskc_keyReference: at_pskc_keyReference(),
+     id_pskc_friendlyName: at_pskc_friendlyName(),
+     id_pskc_algorithmParameters: at_pskc_algorithmParameters(),
+     id_pskc_counter: at_pskc_counter(),
+     id_pskc_time: at_pskc_time(),
+     id_pskc_timeInterval: at_pskc_timeInterval(),
+     id_pskc_timeDrift: at_pskc_timeDrift(),
+     id_pskc_valueMAC: at_pskc_valueMAC(),
+     id_pskc_keyUserId: at_pskc_keyUserId(),
+     id_pskc_keyStartDate: at_pskc_keyStartDate(),
+     id_pskc_keyExpiryDate: at_pskc_keyExpiryDate(),
+     id_pskc_numberOfTransactions: at_pskc_numberOfTransactions(),
+     id_pskc_keyUsages: at_pskc_keyUsage(),
+     id_pskc_pinPolicy: at_pskc_pinPolicy(),
+}
+
+
+# This definition replaces Attribute() from rfc5652.py; it is the same except
+# that opentype is added with sKeyPkgAttributesMap and sKeyAttributesMap
+
+class AttributeType(univ.ObjectIdentifier):
+    pass
+
+
+class AttributeValue(univ.Any):
+    pass
+
+
+class SKeyAttribute(univ.Sequence):
+    pass
+
+SKeyAttribute.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('attrType', AttributeType()),
+    namedtype.NamedType('attrValues',
+        univ.SetOf(componentType=AttributeValue()),
+        openType=opentype.OpenType('attrType', sKeyAttributesMap)
+    )
+)
+
+
+class SKeyPkgAttribute(univ.Sequence):
+    pass
+
+SKeyPkgAttribute.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('attrType', AttributeType()),
+    namedtype.NamedType('attrValues',
+        univ.SetOf(componentType=AttributeValue()),
+        openType=opentype.OpenType('attrType', sKeyPkgAttributesMap)
+    )
+)
+
+
+# Symmetric Key Package Content Type
+
+id_ct_KP_sKeyPackage = univ.ObjectIdentifier('1.2.840.113549.1.9.16.1.25')
+
+
+class KeyPkgVersion(univ.Integer):
+    pass
+
+KeyPkgVersion.namedValues = namedval.NamedValues(
+    ('v1', 1)
+)
+
+
+class OneSymmetricKey(univ.Sequence):
+    pass
+
+OneSymmetricKey.componentType = namedtype.NamedTypes(
+    namedtype.OptionalNamedType('sKeyAttrs',
+        univ.SequenceOf(componentType=SKeyAttribute()).subtype(
+            subtypeSpec=constraint.ValueSizeConstraint(1, MAX))),
+    namedtype.OptionalNamedType('sKey', univ.OctetString())
+)
+
+OneSymmetricKey.sizeSpec = univ.Sequence.sizeSpec + constraint.ValueSizeConstraint(1, 2)
+
+
+class SymmetricKeys(univ.SequenceOf):
+    pass
+
+SymmetricKeys.componentType = OneSymmetricKey()
+SymmetricKeys.subtypeSpec=constraint.ValueSizeConstraint(1, MAX)
+
+
+class SymmetricKeyPackage(univ.Sequence):
+    pass
+
+SymmetricKeyPackage.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version', KeyPkgVersion().subtype(value='v1')),
+    namedtype.OptionalNamedType('sKeyPkgAttrs',
+        univ.SequenceOf(componentType=SKeyPkgAttribute()).subtype(
+            subtypeSpec=constraint.ValueSizeConstraint(1, MAX),
+            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.NamedType('sKeys', SymmetricKeys())
+)
+
+
+# Map of Content Type OIDs to Content Types are
+# added to the ones that are in rfc5652.py
+
+_cmsContentTypesMapUpdate = {
+    id_ct_KP_sKeyPackage: SymmetricKeyPackage(),
+}
+
+rfc5652.cmsContentTypesMap.update(_cmsContentTypesMapUpdate)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc7229.py

@@ -0,0 +1,29 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# Object Identifiers for Test Certificate Policies
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc7229.txt
+#
+
+from pyasn1.type import univ
+
+
+id_pkix = univ.ObjectIdentifier('1.3.6.1.5.5.7')
+
+id_TEST = id_pkix + (13, )
+
+id_TEST_certPolicyOne   = id_TEST + (1, )
+id_TEST_certPolicyTwo   = id_TEST + (2, )
+id_TEST_certPolicyThree = id_TEST + (3, )
+id_TEST_certPolicyFour  = id_TEST + (4, )
+id_TEST_certPolicyFive  = id_TEST + (5, )
+id_TEST_certPolicySix   = id_TEST + (6, )
+id_TEST_certPolicySeven = id_TEST + (7, )
+id_TEST_certPolicyEight = id_TEST + (8, )

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc7585.py

@@ -0,0 +1,50 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley with some assistance from asn1ate v.0.6.0.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# Network Access Identifier (NAI) Realm Name for Certificates
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc7585.txt
+#
+
+from pyasn1.type import char
+from pyasn1.type import constraint
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc5280
+
+
+# NAI Realm Name for Certificates
+
+id_pkix = univ.ObjectIdentifier('1.3.6.1.5.5.7')
+
+id_on = id_pkix + (8, )
+
+id_on_naiRealm = id_on + (8, )
+
+
+ub_naiRealm_length = univ.Integer(255)
+
+
+class NAIRealm(char.UTF8String):
+    subtypeSpec = constraint.ValueSizeConstraint(1, ub_naiRealm_length)
+
+
+naiRealm = rfc5280.AnotherName()
+naiRealm['type-id'] = id_on_naiRealm
+naiRealm['value'] = NAIRealm()
+
+
+# Map of Other Name OIDs to Other Name is added to the
+# ones that are in rfc5280.py
+
+_anotherNameMapUpdate = {
+    id_on_naiRealm: NAIRealm(),
+}
+
+rfc5280.anotherNameMap.update(_anotherNameMapUpdate)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pyasn1_modules/rfc7894.py

@@ -0,0 +1,92 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# Alternative Challenge Password Attributes for EST
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc7894.txt
+#
+
+from pyasn1.type import char
+from pyasn1.type import constraint
+from pyasn1.type import namedtype
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc5652
+from pyasn1_modules import rfc6402
+from pyasn1_modules import rfc7191
+
+
+# SingleAttribute is the same as Attribute in RFC 5652, except that the
+# attrValues SET must have one and only one member
+
+Attribute = rfc7191.SingleAttribute
+
+
+# DirectoryString is the same as RFC 5280, except the length is limited to 255
+
+class DirectoryString(univ.Choice):
+    pass
+
+DirectoryString.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('teletexString', char.TeletexString().subtype(
+        subtypeSpec=constraint.ValueSizeConstraint(1, 255))),
+    namedtype.NamedType('printableString', char.PrintableString().subtype(
+        subtypeSpec=constraint.ValueSizeConstraint(1, 255))),
+    namedtype.NamedType('universalString', char.UniversalString().subtype(
+        subtypeSpec=constraint.ValueSizeConstraint(1, 255))),
+    namedtype.NamedType('utf8String', char.UTF8String().subtype(
+        subtypeSpec=constraint.ValueSizeConstraint(1, 255))),
+    namedtype.NamedType('bmpString', char.BMPString().subtype(
+        subtypeSpec=constraint.ValueSizeConstraint(1, 255)))
+)
+
+
+# OTP Challenge Attribute
+
+id_aa_otpChallenge = univ.ObjectIdentifier('1.2.840.113549.1.9.16.2.56')
+
+ub_aa_otpChallenge = univ.Integer(255)
+
+otpChallenge = Attribute()
+otpChallenge['attrType'] = id_aa_otpChallenge
+otpChallenge['attrValues'][0] = DirectoryString()
+
+
+# Revocation Challenge Attribute
+
+id_aa_revocationChallenge = univ.ObjectIdentifier('1.2.840.113549.1.9.16.2.57')
+
+ub_aa_revocationChallenge = univ.Integer(255)
+
+revocationChallenge = Attribute()
+revocationChallenge['attrType'] = id_aa_revocationChallenge
+revocationChallenge['attrValues'][0] = DirectoryString()
+
+
+#  EST Identity Linking Attribute
+
+id_aa_estIdentityLinking = univ.ObjectIdentifier('1.2.840.113549.1.9.16.2.58')
+
+ub_aa_est_identity_linking = univ.Integer(255)
+
+estIdentityLinking = Attribute()
+estIdentityLinking['attrType'] = id_aa_estIdentityLinking
+estIdentityLinking['attrValues'][0] = DirectoryString()
+
+
+# Map of Attribute Type OIDs to Attributes added to the
+# ones that are in rfc6402.py
+
+_cmcControlAttributesMapUpdate = {
+    id_aa_otpChallenge: DirectoryString(),
+    id_aa_revocationChallenge: DirectoryString(),
+    id_aa_estIdentityLinking: DirectoryString(),
+}
+
+rfc6402.cmcControlAttributesMap.update(_cmcControlAttributesMapUpdate)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pycodestyle-2.8.0.dist-info/INSTALLER

@@ -0,0 +1 @@
+pip

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pycodestyle-2.8.0.dist-info/LICENSE

@@ -0,0 +1,25 @@
+Copyright © 2006-2009 Johann C. Rocholl <johann@rocholl.net>
+Copyright © 2009-2014 Florent Xicluna <florent.xicluna@gmail.com>
+Copyright © 2014-2020 Ian Lee <IanLee1521@gmail.com>
+
+Licensed under the terms of the Expat License
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation files
+(the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of the Software,
+and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pycodestyle-2.8.0.dist-info/METADATA

@@ -0,0 +1,1063 @@
+Metadata-Version: 2.1
+Name: pycodestyle
+Version: 2.8.0
+Summary: Python style guide checker
+Home-page: https://pycodestyle.pycqa.org/
+Author: Johann C. Rocholl
+Author-email: johann@rocholl.net
+Maintainer: Ian Lee
+Maintainer-email: IanLee1521@gmail.com
+License: Expat license
+Project-URL: Changes, https://pycodestyle.pycqa.org/en/latest/developer.html#changes
+Keywords: pycodestyle,pep8,PEP 8,PEP-8,PEP8
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Console
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+License-File: LICENSE
+
+pycodestyle (formerly called pep8) - Python style guide checker
+===============================================================
+
+.. image:: https://github.com/PyCQA/pycodestyle/actions/workflows/main.yml/badge.svg
+   :target: https://github.com/PyCQA/pycodestyle/actions/workflows/main.yml
+   :alt: Build status
+
+.. image:: https://readthedocs.org/projects/pycodestyle/badge/?version=latest
+    :target: https://pycodestyle.pycqa.org
+    :alt: Documentation Status
+
+.. image:: https://img.shields.io/pypi/wheel/pycodestyle.svg
+   :target: https://pypi.org/project/pycodestyle/
+   :alt: Wheel Status
+
+.. image:: https://badges.gitter.im/PyCQA/pycodestyle.svg
+   :alt: Join the chat at https://gitter.im/PyCQA/pycodestyle
+   :target: https://gitter.im/PyCQA/pycodestyle?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
+
+pycodestyle is a tool to check your Python code against some of the style
+conventions in `PEP 8`_.
+
+.. _PEP 8: http://www.python.org/dev/peps/pep-0008/
+
+.. note::
+
+    This package used to be called ``pep8`` but was renamed to ``pycodestyle``
+    to reduce confusion. Further discussion can be found `in the issue where
+    Guido requested this
+    change <https://github.com/PyCQA/pycodestyle/issues/466>`_, or in the
+    lightning talk at PyCon 2016 by @IanLee1521:
+    `slides <https://speakerdeck.com/ianlee1521/pep8-vs-pep-8>`_
+    `video <https://youtu.be/PulzIT8KYLk?t=36m>`_.
+
+Features
+--------
+
+* Plugin architecture: Adding new checks is easy.
+
+* Parseable output: Jump to error location in your editor.
+
+* Small: Just one Python file, requires only stdlib. You can use just
+  the ``pycodestyle.py`` file for this purpose.
+
+* Comes with a comprehensive test suite.
+
+Installation
+------------
+
+You can install, upgrade, and uninstall ``pycodestyle.py`` with these commands::
+
+  $ pip install pycodestyle
+  $ pip install --upgrade pycodestyle
+  $ pip uninstall pycodestyle
+
+There's also a package for Debian/Ubuntu, but it's not always the
+latest version.
+
+Example usage and output
+------------------------
+
+::
+
+  $ pycodestyle --first optparse.py
+  optparse.py:69:11: E401 multiple imports on one line
+  optparse.py:77:1: E302 expected 2 blank lines, found 1
+  optparse.py:88:5: E301 expected 1 blank line, found 0
+  optparse.py:222:34: W602 deprecated form of raising exception
+  optparse.py:347:31: E211 whitespace before '('
+  optparse.py:357:17: E201 whitespace after '{'
+  optparse.py:472:29: E221 multiple spaces before operator
+  optparse.py:544:21: W601 .has_key() is deprecated, use 'in'
+
+You can also make ``pycodestyle.py`` show the source code for each error, and
+even the relevant text from PEP 8::
+
+  $ pycodestyle --show-source --show-pep8 testsuite/E40.py
+  testsuite/E40.py:2:10: E401 multiple imports on one line
+  import os, sys
+           ^
+      Imports should usually be on separate lines.
+
+      Okay: import os\nimport sys
+      E401: import sys, os
+
+
+Or you can display how often each error was found::
+
+  $ pycodestyle --statistics -qq Python-2.5/Lib
+  232     E201 whitespace after '['
+  599     E202 whitespace before ')'
+  631     E203 whitespace before ','
+  842     E211 whitespace before '('
+  2531    E221 multiple spaces before operator
+  4473    E301 expected 1 blank line, found 0
+  4006    E302 expected 2 blank lines, found 1
+  165     E303 too many blank lines (4)
+  325     E401 multiple imports on one line
+  3615    E501 line too long (82 characters)
+  612     W601 .has_key() is deprecated, use 'in'
+  1188    W602 deprecated form of raising exception
+
+Links
+-----
+
+* `Read the documentation <https://pycodestyle.pycqa.org/>`_
+
+* `Fork me on GitHub <http://github.com/PyCQA/pycodestyle>`_
+
+
+Changelog
+=========
+
+2.8.0 (2021-10-10)
+------------------
+
+Changes:
+
+* Drop python 3.4.  PR #982.
+* E712: fix false negative with multiple comparisons.  PR #987.
+* E211: fix false positives with ``match``.  PR #989.
+* E772: improve performance of bare except check.  PR #992.
+* Backport tokenize performance improvement from python 3.10.  PR #993.
+* E225: fix for lambdas containing positional-only args.  PR #1012.
+* Remove ``indent_size_str`` "setting".  PR #995.
+* E402: allow ``__all__`` to be typed.  PR #1019.
+* E225: fix false positives for ``*`` in ``case``.  PR #1003.
+* E201: detect tabs as whitespace.  PR #1015.
+
+
+2.7.0 (2021-03-14)
+------------------
+
+Changes:
+
+* Fix physical checks (such as W191) at end of file.  PR #961.
+* Add ``--indent-size`` option (defaulting to ``4``).  PR #970.
+* W605: fix escaped crlf false positive on windows.  PR #976.
+
+
+2.6.0 (2020-05-11)
+------------------
+
+Announcements:
+
+* Anthony Sottile (@asottile) joined the team as a core developer. :tada:
+
+Changes:
+
+* E306: fix detection inside ``async def``.  PR #929.
+* E301: fix regression disallowing decorated one-liners.  PR #927.
+* E714: fix false positive with chained ``is not``.  PR #931.
+
+
+2.6.0a1 (2020-04-23)
+--------------------
+
+New checks:
+
+* E225: require whitespace around ``and`` ``in`` ``is`` and ``or``.  PR #847.
+
+Changes:
+
+* E117: fix indentation using tabs by treating as 8-space indents.  PR #837.
+* E721: fix false positive with names containg ``istype``.  PR #850.
+* E741: allow ``l`` as a named argument in a function call.  PR #853.
+* E302: fix false-negative with decorated functions.  PR #859.
+* W504: ellipsis (``...``) is no longer treated as a binary operator.  PR #875.
+* E402: allow ``with``, ``if``, ``elif``, ``else`` to guard imports.  PR #834.
+* Add support for assignment expressions ``:=`` (PEP 572).  PR #879.
+* Add support for positional-only arguments ``/`` (PEP 570).  PR #872, #918.
+* Add support for python 3.8.
+* Add support for matrix multiplication operator ``@`` (PEP 465).  PR #897.
+* Support visual indent for continuation lines for ``with`` / ``assert`` /
+  ``raise``.  PR #912.
+* E302: allow two blank lines after a block of one-liners.  PR #913.
+* E302: allow two-and-fewer newlines at the top of the file.  PR #919.
+
+
+2.5.0 (2019-01-29)
+------------------
+
+New checks:
+
+* E117: Over-indented code blocks
+* W505: Maximum doc-string length only when configured with --max-doc-length
+
+Changes:
+
+* Remove support for EOL Python 2.6 and 3.3. PR #720.
+* Add E117 error for over-indented code blocks.
+* Allow W605 to be silenced by `# noqa` and fix the position reported by W605
+* Allow users to omit blank lines around one-liner definitions of classes and
+  functions
+* Include the function return annotation (``->``) as requiring surrounding
+  whitespace only on Python 3
+* Verify that only names can follow ``await``. Previously we allowed numbers
+  and strings.
+* Add support for Python 3.7
+* Fix detection of annotated argument defaults for E252
+* Correct the position reported by W504
+
+
+2.4.0 (2018-04-10)
+------------------
+
+New checks:
+
+* Add W504 warning for checking that a break doesn't happen after a binary
+  operator. This check is ignored by default. PR #502.
+* Add W605 warning for invalid escape sequences in string literals. PR #676.
+* Add W606 warning for 'async' and 'await' reserved keywords being introduced
+  in Python 3.7. PR #684.
+* Add E252 error for missing whitespace around equal sign in type annotated
+  function arguments with defaults values. PR #717.
+
+Changes:
+
+* An internal bisect search has replaced a linear search in order to improve
+  efficiency. PR #648.
+* pycodestyle now uses PyPI trove classifiers in order to document supported
+  python versions on PyPI. PR #654.
+* 'setup.cfg' '[wheel]' section has been renamed to '[bdist_wheel]', as
+  the former is legacy. PR #653.
+* pycodestyle now handles very long lines much more efficiently for python
+  3.2+. Fixes #643. PR #644.
+* You can now write 'pycodestyle.StyleGuide(verbose=True)' instead of
+  'pycodestyle.StyleGuide(verbose=True, paths=['-v'])' in order to achieve
+  verbosity. PR #663.
+* The distribution of pycodestyle now includes the license text in order to
+  comply with open source licenses which require this. PR #694.
+* 'maximum_line_length' now ignores shebang ('#!') lines. PR #736.
+* Add configuration option for the allowed number of blank lines. It is
+  implemented as a top level dictionary which can be easily overwritten. Fixes
+  #732. PR #733.
+
+Bugs:
+
+* Prevent a 'DeprecationWarning', and a 'SyntaxError' in future python, caused
+  by an invalid escape sequence. PR #625.
+* Correctly report E501 when the first line of a docstring is too long.
+  Resolves #622. PR #630.
+* Support variable annotation when variable start by a keyword, such as class
+  variable type annotations in python 3.6. PR #640.
+* pycodestyle internals have been changed in order to allow 'python3 -m
+  cProfile' to report correct metrics. PR #647.
+* Fix a spelling mistake in the description of E722. PR #697.
+* 'pycodestyle --diff' now does not break if your 'gitconfig' enables
+  'mnemonicprefix'. PR #706.
+
+2.3.1 (2017-01-31)
+------------------
+
+Bugs:
+
+* Fix regression in detection of E302 and E306; #618, #620
+
+2.3.0 (2017-01-30)
+------------------
+
+New Checks:
+
+* Add E722 warning for bare ``except`` clauses
+* Report E704 for async function definitions (``async def``)
+
+Bugs:
+
+* Fix another E305 false positive for variables beginning with "class" or
+  "def"
+* Fix detection of multiple spaces between ``async`` and ``def``
+* Fix handling of variable annotations. Stop reporting E701 on Python 3.6 for
+  variable annotations.
+
+2.2.0 (2016-11-14)
+------------------
+
+Announcements:
+
+* Added Make target to obtain proper tarball file permissions; #599
+
+Bugs:
+
+* Fixed E305 regression caused by #400; #593
+
+2.1.0 (2016-11-04)
+------------------
+
+Announcements:
+
+* Change all references to the pep8 project to say pycodestyle; #530
+
+Changes:
+
+* Report E302 for blank lines before an "async def"; #556
+* Update our list of tested and supported Python versions which are 2.6, 2.7,
+  3.2, 3.3, 3.4 and 3.5 as well as the nightly Python build and PyPy.
+* Report E742 and E743 for functions and classes badly named 'l', 'O', or 'I'.
+* Report E741 on 'global' and 'nonlocal' statements, as well as prohibited
+  single-letter variables.
+* Deprecated use of `[pep8]` section name in favor of `[pycodestyle]`; #591
+* Report E722 when bare except clause is used; #579
+
+Bugs:
+
+* Fix opt_type AssertionError when using Flake8 2.6.2 and pycodestyle; #561
+* Require two blank lines after toplevel def, class; #536
+* Remove accidentally quadratic computation based on the number of colons. This
+  will make pycodestyle faster in some cases; #314
+
+2.0.0 (2016-05-31)
+------------------
+
+Announcements:
+
+* Repository renamed to `pycodestyle`; Issue #466 / #481.
+* Added joint Code of Conduct as member of PyCQA; #483
+
+Changes:
+
+* Added tox test support for Python 3.5 and pypy3
+* Added check E275 for whitespace on `from ... import ...` lines; #489 / #491
+* Added W503 to the list of codes ignored by default ignore list; #498
+* Removed use of project level `.pep8` configuration file; #364
+
+Bugs:
+
+* Fixed bug with treating `~` operator as binary; #383 / #384
+* Identify binary operators as unary; #484 / #485
+
+1.7.0 (2016-01-12)
+------------------
+
+Announcements:
+
+* Repository moved to PyCQA Organization on GitHub:
+  https://github.com/pycqa/pep8
+
+Changes:
+
+* Reverted the fix in #368, "options passed on command line are only ones
+  accepted" feature. This has many unintended consequences in pep8 and flake8
+  and needs to be reworked when I have more time.
+* Added support for Python 3.5. (Issue #420 & #459)
+* Added support for multi-line config_file option parsing. (Issue #429)
+* Improved parameter parsing. (Issues #420 & #456)
+
+Bugs:
+
+* Fixed BytesWarning on Python 3. (Issue #459)
+
+1.6.2 (2015-02-15)
+------------------
+
+Changes:
+
+* Added check for breaking around a binary operator. (Issue #197, Pull #305)
+
+Bugs:
+
+* Restored config_file parameter in process_options(). (Issue #380)
+
+
+1.6.1 (2015-02-08)
+------------------
+
+Changes:
+
+* Assign variables before referenced. (Issue #287)
+
+Bugs:
+
+* Exception thrown due to unassigned ``local_dir`` variable. (Issue #377)
+
+
+1.6.0 (2015-02-06)
+------------------
+
+News:
+
+* Ian Lee <ianlee1521@gmail.com> joined the project as a maintainer.
+
+Changes:
+
+* Report E731 for lambda assignment. (Issue #277)
+
+* Report E704 for one-liner def instead of E701.
+  Do not report this error in the default configuration. (Issue #277)
+
+* Replace codes E111, E112 and E113 with codes E114, E115 and E116
+  for bad indentation of comments. (Issue #274)
+
+* Report E266 instead of E265 when the block comment starts with
+  multiple ``#``. (Issue #270)
+
+* Report E402 for import statements not at the top of the file. (Issue #264)
+
+* Do not enforce whitespaces around ``**`` operator. (Issue #292)
+
+* Strip whitespace from around paths during normalization. (Issue #339 / #343)
+
+* Update ``--format`` documentation. (Issue #198 / Pull Request #310)
+
+* Add ``.tox/`` to default excludes. (Issue #335)
+
+* Do not report E121 or E126 in the default configuration. (Issues #256 / #316)
+
+* Allow spaces around the equals sign in an annotated function. (Issue #357)
+
+* Allow trailing backslash if in an inline comment. (Issue #374)
+
+* If ``--config`` is used, only that configuration is processed. Otherwise,
+  merge the user and local configurations are merged. (Issue #368 / #369)
+
+Bug fixes:
+
+* Don't crash if Checker.build_tokens_line() returns None. (Issue #306)
+
+* Don't crash if os.path.expanduser() throws an ImportError. (Issue #297)
+
+* Missing space around keyword parameter equal not always reported, E251.
+  (Issue #323)
+
+* Fix false positive E711/E712/E713. (Issues #330 and #336)
+
+* Do not skip physical checks if the newline is escaped. (Issue #319)
+
+* Flush sys.stdout to avoid race conditions with printing. See flake8 bug:
+  https://gitlab.com/pycqa/flake8/issues/17 for more details. (Issue #363)
+
+
+1.5.7 (2014-05-29)
+------------------
+
+Bug fixes:
+
+* Skip the traceback on "Broken pipe" signal. (Issue #275)
+
+* Do not exit when an option in ``setup.cfg`` or ``tox.ini``
+  is not recognized.
+
+* Check the last line even if it does not end with a newline. (Issue #286)
+
+* Always open files in universal newlines mode in Python 2. (Issue #288)
+
+
+1.5.6 (2014-04-14)
+------------------
+
+Bug fixes:
+
+* Check the last line even if it has no end-of-line. (Issue #273)
+
+
+1.5.5 (2014-04-10)
+------------------
+
+Bug fixes:
+
+* Fix regression with E22 checks and inline comments. (Issue #271)
+
+
+1.5.4 (2014-04-07)
+------------------
+
+Bug fixes:
+
+* Fix negative offset with E303 before a multi-line docstring.
+  (Issue #269)
+
+
+1.5.3 (2014-04-04)
+------------------
+
+Bug fixes:
+
+* Fix wrong offset computation when error is on the last char
+  of a physical line. (Issue #268)
+
+
+1.5.2 (2014-04-04)
+------------------
+
+Changes:
+
+* Distribute a universal wheel file.
+
+Bug fixes:
+
+* Report correct line number for E303 with comments. (Issue #60)
+
+* Do not allow newline after parameter equal. (Issue #252)
+
+* Fix line number reported for multi-line strings. (Issue #220)
+
+* Fix false positive E121/E126 with multi-line strings. (Issue #265)
+
+* Fix E501 not detected in comments with Python 2.5.
+
+* Fix caret position with ``--show-source`` when line contains tabs.
+
+
+1.5.1 (2014-03-27)
+------------------
+
+Bug fixes:
+
+* Fix a crash with E125 on multi-line strings. (Issue #263)
+
+
+1.5 (2014-03-26)
+----------------
+
+Changes:
+
+* Report E129 instead of E125 for visually indented line with same
+  indent as next logical line.  (Issue #126)
+
+* Report E265 for space before block comment. (Issue #190)
+
+* Report E713 and E714 when operators ``not in`` and ``is not`` are
+  recommended. (Issue #236)
+
+* Allow long lines in multiline strings and comments if they cannot
+  be wrapped. (Issue #224).
+
+* Optionally disable physical line checks inside multiline strings,
+  using ``# noqa``. (Issue #242)
+
+* Change text for E121 to report "continuation line under-indented
+  for hanging indent" instead of indentation not being a
+  multiple of 4.
+
+* Report E131 instead of E121 / E126 if the hanging indent is not
+  consistent within the same continuation block.  It helps when
+  error E121 or E126 is in the ``ignore`` list.
+
+* Report E126 instead of E121 when the continuation line is hanging
+  with extra indentation, even if indentation is not a multiple of 4.
+
+Bug fixes:
+
+* Allow the checkers to report errors on empty files. (Issue #240)
+
+* Fix ignoring too many checks when ``--select`` is used with codes
+  declared in a flake8 extension. (Issue #216)
+
+* Fix regression with multiple brackets. (Issue #214)
+
+* Fix ``StyleGuide`` to parse the local configuration if the
+  keyword argument ``paths`` is specified. (Issue #246)
+
+* Fix a false positive E124 for hanging indent. (Issue #254)
+
+* Fix a false positive E126 with embedded colon. (Issue #144)
+
+* Fix a false positive E126 when indenting with tabs. (Issue #204)
+
+* Fix behaviour when ``exclude`` is in the configuration file and
+  the current directory is not the project directory. (Issue #247)
+
+* The logical checks can return ``None`` instead of an empty iterator.
+  (Issue #250)
+
+* Do not report multiple E101 if only the first indentation starts
+  with a tab. (Issue #237)
+
+* Fix a rare false positive W602. (Issue #34)
+
+
+1.4.6 (2013-07-02)
+------------------
+
+Changes:
+
+* Honor ``# noqa`` for errors E711 and E712. (Issue #180)
+
+* When both a ``tox.ini`` and a ``setup.cfg`` are present in the project
+  directory, merge their contents.  The ``tox.ini`` file takes
+  precedence (same as before). (Issue #182)
+
+* Give priority to ``--select`` over ``--ignore``. (Issue #188)
+
+* Compare full path when excluding a file. (Issue #186)
+
+* New option ``--hang-closing`` to switch to the alternative style of
+  closing bracket indentation for hanging indent.  Add error E133 for
+  closing bracket which is missing indentation. (Issue #103)
+
+* Accept both styles of closing bracket indentation for hanging indent.
+  Do not report error E123 in the default configuration. (Issue #103)
+
+Bug fixes:
+
+* Do not crash when running AST checks and the document contains null bytes.
+  (Issue #184)
+
+* Correctly report other E12 errors when E123 is ignored. (Issue #103)
+
+* Fix false positive E261/E262 when the file contains a BOM. (Issue #193)
+
+* Fix E701, E702 and E703 not detected sometimes. (Issue #196)
+
+* Fix E122 not detected in some cases. (Issue #201 and #208)
+
+* Fix false positive E121 with multiple brackets. (Issue #203)
+
+
+1.4.5 (2013-03-06)
+------------------
+
+* When no path is specified, do not try to read from stdin.  The feature
+  was added in 1.4.3, but it is not supported on Windows.  Use ``-``
+  filename argument to read from stdin.  This usage is supported
+  since 1.3.4. (Issue #170)
+
+* Do not require ``setuptools`` in setup.py.  It works around an issue
+  with ``pip`` and Python 3. (Issue #172)
+
+* Add ``__pycache__`` to the ignore list.
+
+* Change misleading message for E251. (Issue #171)
+
+* Do not report false E302 when the source file has a coding cookie or a
+  comment on the first line. (Issue #174)
+
+* Reorganize the tests and add tests for the API and for the command line
+  usage and options. (Issues #161 and #162)
+
+* Ignore all checks which are not explicitly selected when ``select`` is
+  passed to the ``StyleGuide`` constructor.
+
+
+1.4.4 (2013-02-24)
+------------------
+
+* Report E227 or E228 instead of E225 for whitespace around bitwise, shift
+  or modulo operators. (Issue #166)
+
+* Change the message for E226 to make clear that it is about arithmetic
+  operators.
+
+* Fix a false positive E128 for continuation line indentation with tabs.
+
+* Fix regression with the ``--diff`` option. (Issue #169)
+
+* Fix the ``TestReport`` class to print the unexpected warnings and
+  errors.
+
+
+1.4.3 (2013-02-22)
+------------------
+
+* Hide the ``--doctest`` and ``--testsuite`` options when installed.
+
+* Fix crash with AST checkers when the syntax is invalid. (Issue #160)
+
+* Read from standard input if no path is specified.
+
+* Initiate a graceful shutdown on ``Control+C``.
+
+* Allow changing the ``checker_class`` for the ``StyleGuide``.
+
+
+1.4.2 (2013-02-10)
+------------------
+
+* Support AST checkers provided by third-party applications.
+
+* Register new checkers with ``register_check(func_or_cls, codes)``.
+
+* Allow constructing a ``StyleGuide`` with a custom parser.
+
+* Accept visual indentation without parenthesis after the ``if``
+  statement. (Issue #151)
+
+* Fix UnboundLocalError when using ``# noqa`` with continued lines.
+  (Issue #158)
+
+* Re-order the lines for the ``StandardReport``.
+
+* Expand tabs when checking E12 continuation lines. (Issue #155)
+
+* Refactor the testing class ``TestReport`` and the specific test
+  functions into a separate test module.
+
+
+1.4.1 (2013-01-18)
+------------------
+
+* Allow sphinx.ext.autodoc syntax for comments. (Issue #110)
+
+* Report E703 instead of E702 for the trailing semicolon. (Issue #117)
+
+* Honor ``# noqa`` in addition to ``# nopep8``. (Issue #149)
+
+* Expose the ``OptionParser`` factory for better extensibility.
+
+
+1.4 (2012-12-22)
+----------------
+
+* Report E226 instead of E225 for optional whitespace around common
+  operators (``*``, ``**``, ``/``, ``+`` and ``-``).  This new error
+  code is ignored in the default configuration because PEP 8 recommends
+  to "use your own judgement". (Issue #96)
+
+* Lines with a ``# nopep8`` at the end will not issue errors on line
+  length E501 or continuation line indentation E12*. (Issue #27)
+
+* Fix AssertionError when the source file contains an invalid line
+  ending ``"\r\r\n"``. (Issue #119)
+
+* Read the ``[pep8]`` section of ``tox.ini`` or ``setup.cfg`` if present.
+  (Issue #93 and #141)
+
+* Add the Sphinx-based documentation, and publish it
+  on https://pycodestyle.readthedocs.io/. (Issue #105)
+
+
+1.3.4 (2012-12-18)
+------------------
+
+* Fix false positive E124 and E128 with comments. (Issue #100)
+
+* Fix error on stdin when running with bpython. (Issue #101)
+
+* Fix false positive E401. (Issue #104)
+
+* Report E231 for nested dictionary in list. (Issue #142)
+
+* Catch E271 at the beginning of the line. (Issue #133)
+
+* Fix false positive E126 for multi-line comments. (Issue #138)
+
+* Fix false positive E221 when operator is preceded by a comma. (Issue #135)
+
+* Fix ``--diff`` failing on one-line hunk. (Issue #137)
+
+* Fix the ``--exclude`` switch for directory paths. (Issue #111)
+
+* Use ``-`` filename to read from standard input. (Issue #128)
+
+
+1.3.3 (2012-06-27)
+------------------
+
+* Fix regression with continuation line checker. (Issue #98)
+
+
+1.3.2 (2012-06-26)
+------------------
+
+* Revert to the previous behaviour for ``--show-pep8``:
+  do not imply ``--first``. (Issue #89)
+
+* Add E902 for IO errors. (Issue #87)
+
+* Fix false positive for E121, and missed E124. (Issue #92)
+
+* Set a sensible default path for config file on Windows. (Issue #95)
+
+* Allow ``verbose`` in the configuration file. (Issue #91)
+
+* Show the enforced ``max-line-length`` in the error message. (Issue #86)
+
+
+1.3.1 (2012-06-18)
+------------------
+
+* Explain which configuration options are expected.  Accept and recommend
+  the options names with hyphen instead of underscore. (Issue #82)
+
+* Do not read the user configuration when used as a module
+  (except if ``config_file=True`` is passed to the ``StyleGuide`` constructor).
+
+* Fix wrong or missing cases for the E12 series.
+
+* Fix cases where E122 was missed. (Issue #81)
+
+
+1.3 (2012-06-15)
+----------------
+
+.. warning::
+   The internal API is backwards incompatible.
+
+* Remove global configuration and refactor the library around
+  a ``StyleGuide`` class; add the ability to configure various
+  reporters. (Issue #35 and #66)
+
+* Read user configuration from ``~/.config/pep8``
+  and local configuration from ``./.pep8``. (Issue #22)
+
+* Fix E502 for backslash embedded in multi-line string. (Issue #68)
+
+* Fix E225 for Python 3 iterable unpacking (PEP 3132). (Issue #72)
+
+* Enable the new checkers from the E12 series in the default
+  configuration.
+
+* Suggest less error-prone alternatives for E712 errors.
+
+* Rewrite checkers to run faster (E22, E251, E27).
+
+* Fixed a crash when parsed code is invalid (too many
+  closing brackets).
+
+* Fix E127 and E128 for continuation line indentation. (Issue #74)
+
+* New option ``--format`` to customize the error format. (Issue #23)
+
+* New option ``--diff`` to check only modified code.  The unified
+  diff is read from STDIN.  Example: ``hg diff | pep8 --diff``
+  (Issue #39)
+
+* Correctly report the count of failures and set the exit code to 1
+  when the ``--doctest`` or the ``--testsuite`` fails.
+
+* Correctly detect the encoding in Python 3. (Issue #69)
+
+* Drop support for Python 2.3, 2.4 and 3.0. (Issue #78)
+
+
+1.2 (2012-06-01)
+----------------
+
+* Add E121 through E128 for continuation line indentation.  These
+  checks are disabled by default.  If you want to force all checks,
+  use switch ``--select=E,W``.  Patch by Sam Vilain. (Issue #64)
+
+* Add E721 for direct type comparisons. (Issue #47)
+
+* Add E711 and E712 for comparisons to singletons. (Issue #46)
+
+* Fix spurious E225 and E701 for function annotations. (Issue #29)
+
+* Add E502 for explicit line join between brackets.
+
+* Fix E901 when printing source with ``--show-source``.
+
+* Report all errors for each checker, instead of reporting only the
+  first occurrence for each line.
+
+* Option ``--show-pep8`` implies ``--first``.
+
+
+1.1 (2012-05-24)
+----------------
+
+* Add E901 for syntax errors. (Issues #63 and #30)
+
+* Add E271, E272, E273 and E274 for extraneous whitespace around
+  keywords. (Issue #57)
+
+* Add ``tox.ini`` configuration file for tests. (Issue #61)
+
+* Add ``.travis.yml`` configuration file for continuous integration.
+  (Issue #62)
+
+
+1.0.1 (2012-04-06)
+------------------
+
+* Fix inconsistent version numbers.
+
+
+1.0 (2012-04-04)
+----------------
+
+* Fix W602 ``raise`` to handle multi-char names. (Issue #53)
+
+
+0.7.0 (2012-03-26)
+------------------
+
+* Now ``--first`` prints only the first occurrence of each error.
+  The ``--repeat`` flag becomes obsolete because it is the default
+  behaviour. (Issue #6)
+
+* Allow specifying ``--max-line-length``. (Issue #36)
+
+* Make the shebang more flexible. (Issue #26)
+
+* Add testsuite to the bundle. (Issue #25)
+
+* Fixes for Jython. (Issue #49)
+
+* Add PyPI classifiers. (Issue #43)
+
+* Fix the ``--exclude`` option. (Issue #48)
+
+* Fix W602, accept ``raise`` with 3 arguments. (Issue #34)
+
+* Correctly select all tests if ``DEFAULT_IGNORE == ''``.
+
+
+0.6.1 (2010-10-03)
+------------------
+
+* Fix inconsistent version numbers. (Issue #21)
+
+
+0.6.0 (2010-09-19)
+------------------
+
+* Test suite reorganized and enhanced in order to check more failures
+  with fewer test files.  Read the ``run_tests`` docstring for details
+  about the syntax.
+
+* Fix E225: accept ``print >>sys.stderr, "..."`` syntax.
+
+* Fix E501 for lines containing multibyte encoded characters. (Issue #7)
+
+* Fix E221, E222, E223, E224 not detected in some cases. (Issue #16)
+
+* Fix E211 to reject ``v = dic['a'] ['b']``. (Issue #17)
+
+* Exit code is always 1 if any error or warning is found. (Issue #10)
+
+* ``--ignore`` checks are now really ignored, especially in
+  conjunction with ``--count``. (Issue #8)
+
+* Blank lines with spaces yield W293 instead of W291: some developers
+  want to ignore this warning and indent the blank lines to paste their
+  code easily in the Python interpreter.
+
+* Fix E301: do not require a blank line before an indented block. (Issue #14)
+
+* Fix E203 to accept NumPy slice notation ``a[0, :]``. (Issue #13)
+
+* Performance improvements.
+
+* Fix decoding and checking non-UTF8 files in Python 3.
+
+* Fix E225: reject ``True+False`` when running on Python 3.
+
+* Fix an exception when the line starts with an operator.
+
+* Allow a new line before closing ``)``, ``}`` or ``]``. (Issue #5)
+
+
+0.5.0 (2010-02-17)
+------------------
+
+* Changed the ``--count`` switch to print to sys.stderr and set
+  exit code to 1 if any error or warning is found.
+
+* E241 and E242 are removed from the standard checks. If you want to
+  include these checks, use switch ``--select=E,W``. (Issue #4)
+
+* Blank line is not mandatory before the first class method or nested
+  function definition, even if there's a docstring. (Issue #1)
+
+* Add the switch ``--version``.
+
+* Fix decoding errors with Python 3. (Issue #13 [1]_)
+
+* Add ``--select`` option which is mirror of ``--ignore``.
+
+* Add checks E261 and E262 for spaces before inline comments.
+
+* New check W604 warns about deprecated usage of backticks.
+
+* New check W603 warns about the deprecated operator ``<>``.
+
+* Performance improvement, due to rewriting of E225.
+
+* E225 now accepts:
+
+  - no whitespace after unary operator or similar. (Issue #9 [1]_)
+
+  - lambda function with argument unpacking or keyword defaults.
+
+* Reserve "2 blank lines" for module-level logical blocks. (E303)
+
+* Allow multi-line comments. (E302, issue #10 [1]_)
+
+
+0.4.2 (2009-10-22)
+------------------
+
+* Decorators on classes and class methods are OK now.
+
+
+0.4 (2009-10-20)
+----------------
+
+* Support for all versions of Python from 2.3 to 3.1.
+
+* New and greatly expanded self tests.
+
+* Added ``--count`` option to print the total number of errors and warnings.
+
+* Further improvements to the handling of comments and blank lines.
+  (Issue #1 [1]_ and others changes.)
+
+* Check all py files in directory when passed a directory (Issue
+  #2 [1]_). This also prevents an exception when traversing directories
+  with non ``*.py`` files.
+
+* E231 should allow commas to be followed by ``)``. (Issue #3 [1]_)
+
+* Spaces are no longer required around the equals sign for keyword
+  arguments or default parameter values.
+
+
+.. [1] These issues refer to the `previous issue tracker`__.
+.. __:  http://github.com/cburroughs/pep8.py/issues
+
+
+0.3.1 (2009-09-14)
+------------------
+
+* Fixes for comments: do not count them when checking for blank lines between
+  items.
+
+* Added setup.py for pypi upload and easy_installability.
+
+
+0.2 (2007-10-16)
+----------------
+
+* Loads of fixes and improvements.
+
+
+0.1 (2006-10-01)
+----------------
+
+* First release.
+
+

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pycodestyle-2.8.0.dist-info/RECORD

@@ -0,0 +1,12 @@
+../../../bin/pycodestyle,sha256=YqpyFg8K_Q6SXk7DJ80K4Q6wKmZU1G06Ti8XKbcJwAA,230
+__pycache__/pycodestyle.cpython-38.pyc,,
+pycodestyle-2.8.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+pycodestyle-2.8.0.dist-info/LICENSE,sha256=93IpXoGvNHjTTojlLQdiACMOx91qOeEjvFyzWqZqva4,1254
+pycodestyle-2.8.0.dist-info/METADATA,sha256=jLxHgy1ywol0Yu2cxoVLIw4XMOlUaUUDZijfTUFV2uY,31230
+pycodestyle-2.8.0.dist-info/RECORD,,
+pycodestyle-2.8.0.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+pycodestyle-2.8.0.dist-info/WHEEL,sha256=WzZ8cwjh8l0jtULNjYq1Hpr-WCqCRgPr--TX4P5I1Wo,110
+pycodestyle-2.8.0.dist-info/entry_points.txt,sha256=6JU_7SAppC93MBSQi1_QxDwEQUyg6cgK71ab9q_Hxco,51
+pycodestyle-2.8.0.dist-info/namespace_packages.txt,sha256=AbpHGcgLb-kRsJGnwFEktk7uzpZOCcBY74-YBdrKVGs,1
+pycodestyle-2.8.0.dist-info/top_level.txt,sha256=rHbIEiXmvsJ016mFcLVcF_d-dKgP3VdfOB6CWbivZug,12
+pycodestyle.py,sha256=3-O2ixYLkFoim3-EN1XLtHL2-oJafe6BQKrY2nbkrA4,105016

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pycodestyle-2.8.0.dist-info/WHEEL

@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.37.0)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pycodestyle-2.8.0.dist-info/entry_points.txt

@@ -0,0 +1,3 @@
+[console_scripts]
+pycodestyle = pycodestyle:_main
+

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pycodestyle-2.8.0.dist-info/namespace_packages.txt

@@ -0,0 +1 @@
+

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/pycodestyle-2.8.0.dist-info/top_level.txt

@@ -0,0 +1 @@
+pycodestyle

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/requests/__init__.py

@@ -0,0 +1,180 @@
+#   __
+#  /__)  _  _     _   _ _/   _
+# / (   (- (/ (/ (- _)  /  _)
+#          /
+
+"""
+Requests HTTP Library
+~~~~~~~~~~~~~~~~~~~~~
+
+Requests is an HTTP library, written in Python, for human beings.
+Basic GET usage:
+
+   >>> import requests
+   >>> r = requests.get('https://www.python.org')
+   >>> r.status_code
+   200
+   >>> b'Python is a programming language' in r.content
+   True
+
+... or POST:
+
+   >>> payload = dict(key1='value1', key2='value2')
+   >>> r = requests.post('https://httpbin.org/post', data=payload)
+   >>> print(r.text)
+   {
+     ...
+     "form": {
+       "key1": "value1",
+       "key2": "value2"
+     },
+     ...
+   }
+
+The other HTTP methods are supported - see `requests.api`. Full documentation
+is at <https://requests.readthedocs.io>.
+
+:copyright: (c) 2017 by Kenneth Reitz.
+:license: Apache 2.0, see LICENSE for more details.
+"""
+
+import warnings
+
+import urllib3
+
+from .exceptions import RequestsDependencyWarning
+
+try:
+    from charset_normalizer import __version__ as charset_normalizer_version
+except ImportError:
+    charset_normalizer_version = None
+
+try:
+    from chardet import __version__ as chardet_version
+except ImportError:
+    chardet_version = None
+
+
+def check_compatibility(urllib3_version, chardet_version, charset_normalizer_version):
+    urllib3_version = urllib3_version.split(".")
+    assert urllib3_version != ["dev"]  # Verify urllib3 isn't installed from git.
+
+    # Sometimes, urllib3 only reports its version as 16.1.
+    if len(urllib3_version) == 2:
+        urllib3_version.append("0")
+
+    # Check urllib3 for compatibility.
+    major, minor, patch = urllib3_version  # noqa: F811
+    major, minor, patch = int(major), int(minor), int(patch)
+    # urllib3 >= 1.21.1, <= 1.26
+    assert major == 1
+    assert minor >= 21
+    assert minor <= 26
+
+    # Check charset_normalizer for compatibility.
+    if chardet_version:
+        major, minor, patch = chardet_version.split(".")[:3]
+        major, minor, patch = int(major), int(minor), int(patch)
+        # chardet_version >= 3.0.2, < 5.0.0
+        assert (3, 0, 2) <= (major, minor, patch) < (5, 0, 0)
+    elif charset_normalizer_version:
+        major, minor, patch = charset_normalizer_version.split(".")[:3]
+        major, minor, patch = int(major), int(minor), int(patch)
+        # charset_normalizer >= 2.0.0 < 3.0.0
+        assert (2, 0, 0) <= (major, minor, patch) < (3, 0, 0)
+    else:
+        raise Exception("You need either charset_normalizer or chardet installed")
+
+
+def _check_cryptography(cryptography_version):
+    # cryptography < 1.3.4
+    try:
+        cryptography_version = list(map(int, cryptography_version.split(".")))
+    except ValueError:
+        return
+
+    if cryptography_version < [1, 3, 4]:
+        warning = "Old version of cryptography ({}) may cause slowdown.".format(
+            cryptography_version
+        )
+        warnings.warn(warning, RequestsDependencyWarning)
+
+
+# Check imported dependencies for compatibility.
+try:
+    check_compatibility(
+        urllib3.__version__, chardet_version, charset_normalizer_version
+    )
+except (AssertionError, ValueError):
+    warnings.warn(
+        "urllib3 ({}) or chardet ({})/charset_normalizer ({}) doesn't match a supported "
+        "version!".format(
+            urllib3.__version__, chardet_version, charset_normalizer_version
+        ),
+        RequestsDependencyWarning,
+    )
+
+# Attempt to enable urllib3's fallback for SNI support
+# if the standard library doesn't support SNI or the
+# 'ssl' library isn't available.
+try:
+    try:
+        import ssl
+    except ImportError:
+        ssl = None
+
+    if not getattr(ssl, "HAS_SNI", False):
+        from urllib3.contrib import pyopenssl
+
+        pyopenssl.inject_into_urllib3()
+
+        # Check cryptography version
+        from cryptography import __version__ as cryptography_version
+
+        _check_cryptography(cryptography_version)
+except ImportError:
+    pass
+
+# urllib3's DependencyWarnings should be silenced.
+from urllib3.exceptions import DependencyWarning
+
+warnings.simplefilter("ignore", DependencyWarning)
+
+# Set default logging handler to avoid "No handler found" warnings.
+import logging
+from logging import NullHandler
+
+from . import packages, utils
+from .__version__ import (
+    __author__,
+    __author_email__,
+    __build__,
+    __cake__,
+    __copyright__,
+    __description__,
+    __license__,
+    __title__,
+    __url__,
+    __version__,
+)
+from .api import delete, get, head, options, patch, post, put, request
+from .exceptions import (
+    ConnectionError,
+    ConnectTimeout,
+    FileModeWarning,
+    HTTPError,
+    JSONDecodeError,
+    ReadTimeout,
+    RequestException,
+    Timeout,
+    TooManyRedirects,
+    URLRequired,
+)
+from .models import PreparedRequest, Request, Response
+from .sessions import Session, session
+from .status_codes import codes
+
+logging.getLogger(__name__).addHandler(NullHandler())
+
+# FileModeWarnings go off per the default.
+warnings.simplefilter("default", FileModeWarning, append=True)

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/requests/__version__.py

@@ -0,0 +1,14 @@
+# .-. .-. .-. . . .-. .-. .-. .-.
+# |(  |-  |.| | | |-  `-.  |  `-.
+# ' ' `-' `-`.`-' `-' `-'  '  `-'
+
+__title__ = "requests"
+__description__ = "Python HTTP for Humans."
+__url__ = "https://requests.readthedocs.io"
+__version__ = "2.28.0"
+__build__ = 0x022800
+__author__ = "Kenneth Reitz"
+__author_email__ = "me@kennethreitz.org"
+__license__ = "Apache 2.0"
+__copyright__ = "Copyright 2022 Kenneth Reitz"
+__cake__ = "\u2728 \U0001f370 \u2728"

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/requests/_internal_utils.py

@@ -0,0 +1,48 @@
+"""
+requests._internal_utils
+~~~~~~~~~~~~~~
+
+Provides utility functions that are consumed internally by Requests
+which depend on extremely few external helpers (such as compat)
+"""
+import re
+
+from .compat import builtin_str
+
+_VALID_HEADER_NAME_RE_BYTE = re.compile(rb"^[^:\s][^:\r\n]*$")
+_VALID_HEADER_NAME_RE_STR = re.compile(r"^[^:\s][^:\r\n]*$")
+_VALID_HEADER_VALUE_RE_BYTE = re.compile(rb"^\S[^\r\n]*$|^$")
+_VALID_HEADER_VALUE_RE_STR = re.compile(r"^\S[^\r\n]*$|^$")
+
+HEADER_VALIDATORS = {
+    bytes: (_VALID_HEADER_NAME_RE_BYTE, _VALID_HEADER_VALUE_RE_BYTE),
+    str: (_VALID_HEADER_NAME_RE_STR, _VALID_HEADER_VALUE_RE_STR),
+}
+
+
+def to_native_string(string, encoding="ascii"):
+    """Given a string object, regardless of type, returns a representation of
+    that string in the native string type, encoding and decoding where
+    necessary. This assumes ASCII unless told otherwise.
+    """
+    if isinstance(string, builtin_str):
+        out = string
+    else:
+        out = string.decode(encoding)
+
+    return out
+
+
+def unicode_is_ascii(u_string):
+    """Determine if unicode string only contains ASCII characters.
+
+    :param str u_string: unicode string to check. Must be unicode
+        and not Python 2 `str`.
+    :rtype: bool
+    """
+    assert isinstance(u_string, str)
+    try:
+        u_string.encode("ascii")
+        return True
+    except UnicodeEncodeError:
+        return False

my_container_sandbox/workspace/anaconda3/lib/python3.8/site-packages/requests/adapters.py

@@ -0,0 +1,584 @@
+"""
+requests.adapters
+~~~~~~~~~~~~~~~~~
+
+This module contains the transport adapters that Requests uses to define
+and maintain connections.
+"""
+
+import os.path
+import socket  # noqa: F401
+
+from urllib3.exceptions import ClosedPoolError, ConnectTimeoutError
+from urllib3.exceptions import HTTPError as _HTTPError
+from urllib3.exceptions import InvalidHeader as _InvalidHeader
+from urllib3.exceptions import (
+    LocationValueError,
+    MaxRetryError,
+    NewConnectionError,
+    ProtocolError,
+)
+from urllib3.exceptions import ProxyError as _ProxyError
+from urllib3.exceptions import ReadTimeoutError, ResponseError
+from urllib3.exceptions import SSLError as _SSLError
+from urllib3.poolmanager import PoolManager, proxy_from_url
+from urllib3.response import HTTPResponse
+from urllib3.util import Timeout as TimeoutSauce
+from urllib3.util import parse_url
+from urllib3.util.retry import Retry
+
+from .auth import _basic_auth_str
+from .compat import basestring, urlparse
+from .cookies import extract_cookies_to_jar
+from .exceptions import (
+    ConnectionError,
+    ConnectTimeout,
+    InvalidHeader,
+    InvalidProxyURL,
+    InvalidSchema,
+    InvalidURL,
+    ProxyError,
+    ReadTimeout,
+    RetryError,
+    SSLError,
+)
+from .models import Response
+from .structures import CaseInsensitiveDict
+from .utils import (
+    DEFAULT_CA_BUNDLE_PATH,
+    extract_zipped_paths,
+    get_auth_from_url,
+    get_encoding_from_headers,
+    prepend_scheme_if_needed,
+    select_proxy,
+    urldefragauth,
+)
+
+try:
+    from urllib3.contrib.socks import SOCKSProxyManager
+except ImportError:
+
+    def SOCKSProxyManager(*args, **kwargs):
+        raise InvalidSchema("Missing dependencies for SOCKS support.")
+
+
+DEFAULT_POOLBLOCK = False
+DEFAULT_POOLSIZE = 10
+DEFAULT_RETRIES = 0
+DEFAULT_POOL_TIMEOUT = None
+
+
+class BaseAdapter:
+    """The Base Transport Adapter"""
+
+    def __init__(self):
+        super().__init__()
+
+    def send(
+        self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None
+    ):
+        """Sends PreparedRequest object. Returns Response object.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param stream: (optional) Whether to stream the request content.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple
+        :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use
+        :param cert: (optional) Any user-provided SSL certificate to be trusted.
+        :param proxies: (optional) The proxies dictionary to apply to the request.
+        """
+        raise NotImplementedError
+
+    def close(self):
+        """Cleans up adapter specific items."""
+        raise NotImplementedError
+
+
+class HTTPAdapter(BaseAdapter):
+    """The built-in HTTP Adapter for urllib3.
+
+    Provides a general-case interface for Requests sessions to contact HTTP and
+    HTTPS urls by implementing the Transport Adapter interface. This class will
+    usually be created by the :class:`Session <Session>` class under the
+    covers.
+
+    :param pool_connections: The number of urllib3 connection pools to cache.
+    :param pool_maxsize: The maximum number of connections to save in the pool.
+    :param max_retries: The maximum number of retries each connection
+        should attempt. Note, this applies only to failed DNS lookups, socket
+        connections and connection timeouts, never to requests where data has
+        made it to the server. By default, Requests does not retry failed
+        connections. If you need granular control over the conditions under
+        which we retry a request, import urllib3's ``Retry`` class and pass
+        that instead.
+    :param pool_block: Whether the connection pool should block for connections.
+
+    Usage::
+
+      >>> import requests
+      >>> s = requests.Session()
+      >>> a = requests.adapters.HTTPAdapter(max_retries=3)
+      >>> s.mount('http://', a)
+    """
+
+    __attrs__ = [
+        "max_retries",
+        "config",
+        "_pool_connections",
+        "_pool_maxsize",
+        "_pool_block",
+    ]
+
+    def __init__(
+        self,
+        pool_connections=DEFAULT_POOLSIZE,
+        pool_maxsize=DEFAULT_POOLSIZE,
+        max_retries=DEFAULT_RETRIES,
+        pool_block=DEFAULT_POOLBLOCK,
+    ):
+        if max_retries == DEFAULT_RETRIES:
+            self.max_retries = Retry(0, read=False)
+        else:
+            self.max_retries = Retry.from_int(max_retries)
+        self.config = {}
+        self.proxy_manager = {}
+
+        super().__init__()
+
+        self._pool_connections = pool_connections
+        self._pool_maxsize = pool_maxsize
+        self._pool_block = pool_block
+
+        self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)
+
+    def __getstate__(self):
+        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
+
+    def __setstate__(self, state):
+        # Can't handle by adding 'proxy_manager' to self.__attrs__ because
+        # self.poolmanager uses a lambda function, which isn't pickleable.
+        self.proxy_manager = {}
+        self.config = {}
+
+        for attr, value in state.items():
+            setattr(self, attr, value)
+
+        self.init_poolmanager(
+            self._pool_connections, self._pool_maxsize, block=self._pool_block
+        )
+
+    def init_poolmanager(
+        self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs
+    ):
+        """Initializes a urllib3 PoolManager.
+
+        This method should not be called from user code, and is only
+        exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param connections: The number of urllib3 connection pools to cache.
+        :param maxsize: The maximum number of connections to save in the pool.
+        :param block: Block when no free connections are available.
+        :param pool_kwargs: Extra keyword arguments used to initialize the Pool Manager.
+        """
+        # save these values for pickling
+        self._pool_connections = connections
+        self._pool_maxsize = maxsize
+        self._pool_block = block
+
+        self.poolmanager = PoolManager(
+            num_pools=connections,
+            maxsize=maxsize,
+            block=block,
+            strict=True,
+            **pool_kwargs,
+        )
+
+    def proxy_manager_for(self, proxy, **proxy_kwargs):
+        """Return urllib3 ProxyManager for the given proxy.
+
+        This method should not be called from user code, and is only
+        exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param proxy: The proxy to return a urllib3 ProxyManager for.
+        :param proxy_kwargs: Extra keyword arguments used to configure the Proxy Manager.
+        :returns: ProxyManager
+        :rtype: urllib3.ProxyManager
+        """
+        if proxy in self.proxy_manager:
+            manager = self.proxy_manager[proxy]
+        elif proxy.lower().startswith("socks"):
+            username, password = get_auth_from_url(proxy)
+            manager = self.proxy_manager[proxy] = SOCKSProxyManager(
+                proxy,
+                username=username,
+                password=password,
+                num_pools=self._pool_connections,
+                maxsize=self._pool_maxsize,
+                block=self._pool_block,
+                **proxy_kwargs,
+            )
+        else:
+            proxy_headers = self.proxy_headers(proxy)
+            manager = self.proxy_manager[proxy] = proxy_from_url(
+                proxy,
+                proxy_headers=proxy_headers,
+                num_pools=self._pool_connections,
+                maxsize=self._pool_maxsize,
+                block=self._pool_block,
+                **proxy_kwargs,
+            )
+
+        return manager
+
+    def cert_verify(self, conn, url, verify, cert):
+        """Verify a SSL certificate. This method should not be called from user
+        code, and is only exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param conn: The urllib3 connection object associated with the cert.
+        :param url: The requested URL.
+        :param verify: Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use
+        :param cert: The SSL certificate to verify.
+        """
+        if url.lower().startswith("https") and verify:
+
+            cert_loc = None
+
+            # Allow self-specified cert location.
+            if verify is not True:
+                cert_loc = verify
+
+            if not cert_loc:
+                cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
+
+            if not cert_loc or not os.path.exists(cert_loc):
+                raise OSError(
+                    f"Could not find a suitable TLS CA certificate bundle, "
+                    f"invalid path: {cert_loc}"
+                )
+
+            conn.cert_reqs = "CERT_REQUIRED"
+
+            if not os.path.isdir(cert_loc):
+                conn.ca_certs = cert_loc
+            else:
+                conn.ca_cert_dir = cert_loc
+        else:
+            conn.cert_reqs = "CERT_NONE"
+            conn.ca_certs = None
+            conn.ca_cert_dir = None
+
+        if cert:
+            if not isinstance(cert, basestring):
+                conn.cert_file = cert[0]
+                conn.key_file = cert[1]
+            else:
+                conn.cert_file = cert
+                conn.key_file = None
+            if conn.cert_file and not os.path.exists(conn.cert_file):
+                raise OSError(
+                    f"Could not find the TLS certificate file, "
+                    f"invalid path: {conn.cert_file}"
+                )
+            if conn.key_file and not os.path.exists(conn.key_file):
+                raise OSError(
+                    f"Could not find the TLS key file, invalid path: {conn.key_file}"
+                )
+
+    def build_response(self, req, resp):
+        """Builds a :class:`Response <requests.Response>` object from a urllib3
+        response. This should not be called from user code, and is only exposed
+        for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`
+
+        :param req: The :class:`PreparedRequest <PreparedRequest>` used to generate the response.
+        :param resp: The urllib3 response object.
+        :rtype: requests.Response
+        """
+        response = Response()
+
+        # Fallback to None if there's no status_code, for whatever reason.
+        response.status_code = getattr(resp, "status", None)
+
+        # Make headers case-insensitive.
+        response.headers = CaseInsensitiveDict(getattr(resp, "headers", {}))
+
+        # Set encoding.
+        response.encoding = get_encoding_from_headers(response.headers)
+        response.raw = resp
+        response.reason = response.raw.reason
+
+        if isinstance(req.url, bytes):
+            response.url = req.url.decode("utf-8")
+        else:
+            response.url = req.url
+
+        # Add new cookies from the server.
+        extract_cookies_to_jar(response.cookies, req, resp)
+
+        # Give the Response some context.
+        response.request = req
+        response.connection = self
+
+        return response
+
+    def get_connection(self, url, proxies=None):
+        """Returns a urllib3 connection for the given URL. This should not be
+        called from user code, and is only exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param url: The URL to connect to.
+        :param proxies: (optional) A Requests-style dictionary of proxies used on this request.
+        :rtype: urllib3.ConnectionPool
+        """
+        proxy = select_proxy(url, proxies)
+
+        if proxy:
+            proxy = prepend_scheme_if_needed(proxy, "http")
+            proxy_url = parse_url(proxy)
+            if not proxy_url.host:
+                raise InvalidProxyURL(
+                    "Please check proxy URL. It is malformed "
+                    "and could be missing the host."
+                )
+            proxy_manager = self.proxy_manager_for(proxy)
+            conn = proxy_manager.connection_from_url(url)
+        else:
+            # Only scheme should be lower case
+            parsed = urlparse(url)
+            url = parsed.geturl()
+            conn = self.poolmanager.connection_from_url(url)
+
+        return conn
+
+    def close(self):
+        """Disposes of any internal state.
+
+        Currently, this closes the PoolManager and any active ProxyManager,
+        which closes any pooled connections.
+        """
+        self.poolmanager.clear()
+        for proxy in self.proxy_manager.values():
+            proxy.clear()
+
+    def request_url(self, request, proxies):
+        """Obtain the url to use when making the final request.
+
+        If the message is being sent through a HTTP proxy, the full URL has to
+        be used. Otherwise, we should only use the path portion of the URL.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs.
+        :rtype: str
+        """
+        proxy = select_proxy(request.url, proxies)
+        scheme = urlparse(request.url).scheme
+
+        is_proxied_http_request = proxy and scheme != "https"
+        using_socks_proxy = False
+        if proxy:
+            proxy_scheme = urlparse(proxy).scheme.lower()
+            using_socks_proxy = proxy_scheme.startswith("socks")
+
+        url = request.path_url
+        if is_proxied_http_request and not using_socks_proxy:
+            url = urldefragauth(request.url)
+
+        return url
+
+    def add_headers(self, request, **kwargs):
+        """Add any headers needed by the connection. As of v2.0 this does
+        nothing by default, but is left for overriding by users that subclass
+        the :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` to add headers to.
+        :param kwargs: The keyword arguments from the call to send().
+        """
+        pass
+
+    def proxy_headers(self, proxy):
+        """Returns a dictionary of the headers to add to any request sent
+        through a proxy. This works with urllib3 magic to ensure that they are
+        correctly sent to the proxy, rather than in a tunnelled request if
+        CONNECT is being used.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param proxy: The url of the proxy being used for this request.
+        :rtype: dict
+        """
+        headers = {}
+        username, password = get_auth_from_url(proxy)
+
+        if username:
+            headers["Proxy-Authorization"] = _basic_auth_str(username, password)
+
+        return headers
+
+    def send(
+        self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None
+    ):
+        """Sends PreparedRequest object. Returns Response object.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param stream: (optional) Whether to stream the request content.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple or urllib3 Timeout object
+        :param verify: (optional) Either a boolean, in which case it controls whether
+            we verify the server's TLS certificate, or a string, in which case it
+            must be a path to a CA bundle to use
+        :param cert: (optional) Any user-provided SSL certificate to be trusted.
+        :param proxies: (optional) The proxies dictionary to apply to the request.
+        :rtype: requests.Response
+        """
+
+        try:
+            conn = self.get_connection(request.url, proxies)
+        except LocationValueError as e:
+            raise InvalidURL(e, request=request)
+
+        self.cert_verify(conn, request.url, verify, cert)
+        url = self.request_url(request, proxies)
+        self.add_headers(
+            request,
+            stream=stream,
+            timeout=timeout,
+            verify=verify,
+            cert=cert,
+            proxies=proxies,
+        )
+
+        chunked = not (request.body is None or "Content-Length" in request.headers)
+
+        if isinstance(timeout, tuple):
+            try:
+                connect, read = timeout
+                timeout = TimeoutSauce(connect=connect, read=read)
+            except ValueError:
+                raise ValueError(
+                    f"Invalid timeout {timeout}. Pass a (connect, read) timeout tuple, "
+                    f"or a single float to set both timeouts to the same value."
+                )
+        elif isinstance(timeout, TimeoutSauce):
+            pass
+        else:
+            timeout = TimeoutSauce(connect=timeout, read=timeout)
+
+        try:
+            if not chunked:
+                resp = conn.urlopen(
+                    method=request.method,
+                    url=url,
+                    body=request.body,
+                    headers=request.headers,
+                    redirect=False,
+                    assert_same_host=False,
+                    preload_content=False,
+                    decode_content=False,
+                    retries=self.max_retries,
+                    timeout=timeout,
+                )
+
+            # Send the request.
+            else:
+                if hasattr(conn, "proxy_pool"):
+                    conn = conn.proxy_pool
+
+                low_conn = conn._get_conn(timeout=DEFAULT_POOL_TIMEOUT)
+
+                try:
+                    skip_host = "Host" in request.headers
+                    low_conn.putrequest(
+                        request.method,
+                        url,
+                        skip_accept_encoding=True,
+                        skip_host=skip_host,
+                    )
+
+                    for header, value in request.headers.items():
+                        low_conn.putheader(header, value)
+
+                    low_conn.endheaders()
+
+                    for i in request.body:
+                        low_conn.send(hex(len(i))[2:].encode("utf-8"))
+                        low_conn.send(b"\r\n")
+                        low_conn.send(i)
+                        low_conn.send(b"\r\n")
+                    low_conn.send(b"0\r\n\r\n")
+
+                    # Receive the response from the server
+                    r = low_conn.getresponse()
+
+                    resp = HTTPResponse.from_httplib(
+                        r,
+                        pool=conn,
+                        connection=low_conn,
+                        preload_content=False,
+                        decode_content=False,
+                    )
+                except Exception:
+                    # If we hit any problems here, clean up the connection.
+                    # Then, raise so that we can handle the actual exception.
+                    low_conn.close()
+                    raise
+
+        except (ProtocolError, OSError) as err:
+            raise ConnectionError(err, request=request)
+
+        except MaxRetryError as e:
+            if isinstance(e.reason, ConnectTimeoutError):
+                # TODO: Remove this in 3.0.0: see #2811
+                if not isinstance(e.reason, NewConnectionError):
+                    raise ConnectTimeout(e, request=request)
+
+            if isinstance(e.reason, ResponseError):
+                raise RetryError(e, request=request)
+
+            if isinstance(e.reason, _ProxyError):
+                raise ProxyError(e, request=request)
+
+            if isinstance(e.reason, _SSLError):
+                # This branch is for urllib3 v1.22 and later.
+                raise SSLError(e, request=request)
+
+            raise ConnectionError(e, request=request)
+
+        except ClosedPoolError as e:
+            raise ConnectionError(e, request=request)
+
+        except _ProxyError as e:
+            raise ProxyError(e)
+
+        except (_SSLError, _HTTPError) as e:
+            if isinstance(e, _SSLError):
+                # This branch is for urllib3 versions earlier than v1.22
+                raise SSLError(e, request=request)
+            elif isinstance(e, ReadTimeoutError):
+                raise ReadTimeout(e, request=request)
+            elif isinstance(e, _InvalidHeader):
+                raise InvalidHeader(e, request=request)
+            else:
+                raise
+
+        return self.build_response(request, resp)