Add files using upload-large-folder tool

parrot/lib/python3.10/importlib/_adapters.py

@@ -0,0 +1,83 @@
+from contextlib import suppress
+
+from . import abc
+
+
+class SpecLoaderAdapter:
+    """
+    Adapt a package spec to adapt the underlying loader.
+    """
+
+    def __init__(self, spec, adapter=lambda spec: spec.loader):
+        self.spec = spec
+        self.loader = adapter(spec)
+
+    def __getattr__(self, name):
+        return getattr(self.spec, name)
+
+
+class TraversableResourcesLoader:
+    """
+    Adapt a loader to provide TraversableResources.
+    """
+
+    def __init__(self, spec):
+        self.spec = spec
+
+    def get_resource_reader(self, name):
+        return DegenerateFiles(self.spec)._native()
+
+
+class DegenerateFiles:
+    """
+    Adapter for an existing or non-existant resource reader
+    to provide a degenerate .files().
+    """
+
+    class Path(abc.Traversable):
+        def iterdir(self):
+            return iter(())
+
+        def is_dir(self):
+            return False
+
+        is_file = exists = is_dir  # type: ignore
+
+        def joinpath(self, other):
+            return DegenerateFiles.Path()
+
+        @property
+        def name(self):
+            return ''
+
+        def open(self, mode='rb', *args, **kwargs):
+            raise ValueError()
+
+    def __init__(self, spec):
+        self.spec = spec
+
+    @property
+    def _reader(self):
+        with suppress(AttributeError):
+            return self.spec.loader.get_resource_reader(self.spec.name)
+
+    def _native(self):
+        """
+        Return the native reader if it supports files().
+        """
+        reader = self._reader
+        return reader if hasattr(reader, 'files') else self
+
+    def __getattr__(self, attr):
+        return getattr(self._reader, attr)
+
+    def files(self):
+        return DegenerateFiles.Path()
+
+
+def wrap_spec(package):
+    """
+    Construct a package spec with traversable compatibility
+    on the spec/loader/reader.
+    """
+    return SpecLoaderAdapter(package.__spec__, TraversableResourcesLoader)

parrot/lib/python3.10/importlib/_bootstrap_external.py

@@ -0,0 +1,1686 @@
+"""Core implementation of path-based import.
+
+This module is NOT meant to be directly imported! It has been designed such
+that it can be bootstrapped into Python as the implementation of import. As
+such it requires the injection of specific modules and attributes in order to
+work. One should use importlib as the public-facing version of this module.
+
+"""
+# IMPORTANT: Whenever making changes to this module, be sure to run a top-level
+# `make regen-importlib` followed by `make` in order to get the frozen version
+# of the module updated. Not doing so will result in the Makefile to fail for
+# all others who don't have a ./python around to freeze the module in the early
+# stages of compilation.
+#
+
+# See importlib._setup() for what is injected into the global namespace.
+
+# When editing this code be aware that code executed at import time CANNOT
+# reference any injected objects! This includes not only global code but also
+# anything specified at the class level.
+
+# Module injected manually by _set_bootstrap_module()
+_bootstrap = None
+
+# Import builtin modules
+import _imp
+import _io
+import sys
+import _warnings
+import marshal
+
+
+_MS_WINDOWS = (sys.platform == 'win32')
+if _MS_WINDOWS:
+    import nt as _os
+    import winreg
+else:
+    import posix as _os
+
+
+if _MS_WINDOWS:
+    path_separators = ['\\', '/']
+else:
+    path_separators = ['/']
+# Assumption made in _path_join()
+assert all(len(sep) == 1 for sep in path_separators)
+path_sep = path_separators[0]
+path_sep_tuple = tuple(path_separators)
+path_separators = ''.join(path_separators)
+_pathseps_with_colon = {f':{s}' for s in path_separators}
+
+
+# Bootstrap-related code ######################################################
+_CASE_INSENSITIVE_PLATFORMS_STR_KEY = 'win',
+_CASE_INSENSITIVE_PLATFORMS_BYTES_KEY = 'cygwin', 'darwin'
+_CASE_INSENSITIVE_PLATFORMS =  (_CASE_INSENSITIVE_PLATFORMS_BYTES_KEY
+                                + _CASE_INSENSITIVE_PLATFORMS_STR_KEY)
+
+
+def _make_relax_case():
+    if sys.platform.startswith(_CASE_INSENSITIVE_PLATFORMS):
+        if sys.platform.startswith(_CASE_INSENSITIVE_PLATFORMS_STR_KEY):
+            key = 'PYTHONCASEOK'
+        else:
+            key = b'PYTHONCASEOK'
+
+        def _relax_case():
+            """True if filenames must be checked case-insensitively and ignore environment flags are not set."""
+            return not sys.flags.ignore_environment and key in _os.environ
+    else:
+        def _relax_case():
+            """True if filenames must be checked case-insensitively."""
+            return False
+    return _relax_case
+
+_relax_case = _make_relax_case()
+
+
+def _pack_uint32(x):
+    """Convert a 32-bit integer to little-endian."""
+    return (int(x) & 0xFFFFFFFF).to_bytes(4, 'little')
+
+
+def _unpack_uint32(data):
+    """Convert 4 bytes in little-endian to an integer."""
+    assert len(data) == 4
+    return int.from_bytes(data, 'little')
+
+def _unpack_uint16(data):
+    """Convert 2 bytes in little-endian to an integer."""
+    assert len(data) == 2
+    return int.from_bytes(data, 'little')
+
+
+if _MS_WINDOWS:
+    def _path_join(*path_parts):
+        """Replacement for os.path.join()."""
+        if not path_parts:
+            return ""
+        if len(path_parts) == 1:
+            return path_parts[0]
+        root = ""
+        path = []
+        for new_root, tail in map(_os._path_splitroot, path_parts):
+            if new_root.startswith(path_sep_tuple) or new_root.endswith(path_sep_tuple):
+                root = new_root.rstrip(path_separators) or root
+                path = [path_sep + tail]
+            elif new_root.endswith(':'):
+                if root.casefold() != new_root.casefold():
+                    # Drive relative paths have to be resolved by the OS, so we reset the
+                    # tail but do not add a path_sep prefix.
+                    root = new_root
+                    path = [tail]
+                else:
+                    path.append(tail)
+            else:
+                root = new_root or root
+                path.append(tail)
+        path = [p.rstrip(path_separators) for p in path if p]
+        if len(path) == 1 and not path[0]:
+            # Avoid losing the root's trailing separator when joining with nothing
+            return root + path_sep
+        return root + path_sep.join(path)
+
+else:
+    def _path_join(*path_parts):
+        """Replacement for os.path.join()."""
+        return path_sep.join([part.rstrip(path_separators)
+                              for part in path_parts if part])
+
+
+def _path_split(path):
+    """Replacement for os.path.split()."""
+    i = max(path.rfind(p) for p in path_separators)
+    if i < 0:
+        return '', path
+    return path[:i], path[i + 1:]
+
+
+def _path_stat(path):
+    """Stat the path.
+
+    Made a separate function to make it easier to override in experiments
+    (e.g. cache stat results).
+
+    """
+    return _os.stat(path)
+
+
+def _path_is_mode_type(path, mode):
+    """Test whether the path is the specified mode type."""
+    try:
+        stat_info = _path_stat(path)
+    except OSError:
+        return False
+    return (stat_info.st_mode & 0o170000) == mode
+
+
+def _path_isfile(path):
+    """Replacement for os.path.isfile."""
+    return _path_is_mode_type(path, 0o100000)
+
+
+def _path_isdir(path):
+    """Replacement for os.path.isdir."""
+    if not path:
+        path = _os.getcwd()
+    return _path_is_mode_type(path, 0o040000)
+
+
+if _MS_WINDOWS:
+    def _path_isabs(path):
+        """Replacement for os.path.isabs."""
+        if not path:
+            return False
+        root = _os._path_splitroot(path)[0].replace('/', '\\')
+        return len(root) > 1 and (root.startswith('\\\\') or root.endswith('\\'))
+
+else:
+    def _path_isabs(path):
+        """Replacement for os.path.isabs."""
+        return path.startswith(path_separators)
+
+
+def _write_atomic(path, data, mode=0o666):
+    """Best-effort function to write data to a path atomically.
+    Be prepared to handle a FileExistsError if concurrent writing of the
+    temporary file is attempted."""
+    # id() is used to generate a pseudo-random filename.
+    path_tmp = '{}.{}'.format(path, id(path))
+    fd = _os.open(path_tmp,
+                  _os.O_EXCL | _os.O_CREAT | _os.O_WRONLY, mode & 0o666)
+    try:
+        # We first write data to a temporary file, and then use os.replace() to
+        # perform an atomic rename.
+        with _io.FileIO(fd, 'wb') as file:
+            file.write(data)
+        _os.replace(path_tmp, path)
+    except OSError:
+        try:
+            _os.unlink(path_tmp)
+        except OSError:
+            pass
+        raise
+
+
+_code_type = type(_write_atomic.__code__)
+
+
+# Finder/loader utility code ###############################################
+
+# Magic word to reject .pyc files generated by other Python versions.
+# It should change for each incompatible change to the bytecode.
+#
+# The value of CR and LF is incorporated so if you ever read or write
+# a .pyc file in text mode the magic number will be wrong; also, the
+# Apple MPW compiler swaps their values, botching string constants.
+#
+# There were a variety of old schemes for setting the magic number.
+# The current working scheme is to increment the previous value by
+# 10.
+#
+# Starting with the adoption of PEP 3147 in Python 3.2, every bump in magic
+# number also includes a new "magic tag", i.e. a human readable string used
+# to represent the magic number in __pycache__ directories.  When you change
+# the magic number, you must also set a new unique magic tag.  Generally this
+# can be named after the Python major version of the magic number bump, but
+# it can really be anything, as long as it's different than anything else
+# that's come before.  The tags are included in the following table, starting
+# with Python 3.2a0.
+#
+# Known values:
+#  Python 1.5:   20121
+#  Python 1.5.1: 20121
+#     Python 1.5.2: 20121
+#     Python 1.6:   50428
+#     Python 2.0:   50823
+#     Python 2.0.1: 50823
+#     Python 2.1:   60202
+#     Python 2.1.1: 60202
+#     Python 2.1.2: 60202
+#     Python 2.2:   60717
+#     Python 2.3a0: 62011
+#     Python 2.3a0: 62021
+#     Python 2.3a0: 62011 (!)
+#     Python 2.4a0: 62041
+#     Python 2.4a3: 62051
+#     Python 2.4b1: 62061
+#     Python 2.5a0: 62071
+#     Python 2.5a0: 62081 (ast-branch)
+#     Python 2.5a0: 62091 (with)
+#     Python 2.5a0: 62092 (changed WITH_CLEANUP opcode)
+#     Python 2.5b3: 62101 (fix wrong code: for x, in ...)
+#     Python 2.5b3: 62111 (fix wrong code: x += yield)
+#     Python 2.5c1: 62121 (fix wrong lnotab with for loops and
+#                          storing constants that should have been removed)
+#     Python 2.5c2: 62131 (fix wrong code: for x, in ... in listcomp/genexp)
+#     Python 2.6a0: 62151 (peephole optimizations and STORE_MAP opcode)
+#     Python 2.6a1: 62161 (WITH_CLEANUP optimization)
+#     Python 2.7a0: 62171 (optimize list comprehensions/change LIST_APPEND)
+#     Python 2.7a0: 62181 (optimize conditional branches:
+#                          introduce POP_JUMP_IF_FALSE and POP_JUMP_IF_TRUE)
+#     Python 2.7a0  62191 (introduce SETUP_WITH)
+#     Python 2.7a0  62201 (introduce BUILD_SET)
+#     Python 2.7a0  62211 (introduce MAP_ADD and SET_ADD)
+#     Python 3000:   3000
+#                    3010 (removed UNARY_CONVERT)
+#                    3020 (added BUILD_SET)
+#                    3030 (added keyword-only parameters)
+#                    3040 (added signature annotations)
+#                    3050 (print becomes a function)
+#                    3060 (PEP 3115 metaclass syntax)
+#                    3061 (string literals become unicode)
+#                    3071 (PEP 3109 raise changes)
+#                    3081 (PEP 3137 make __file__ and __name__ unicode)
+#                    3091 (kill str8 interning)
+#                    3101 (merge from 2.6a0, see 62151)
+#                    3103 (__file__ points to source file)
+#     Python 3.0a4: 3111 (WITH_CLEANUP optimization).
+#     Python 3.0b1: 3131 (lexical exception stacking, including POP_EXCEPT
+                          #3021)
+#     Python 3.1a1: 3141 (optimize list, set and dict comprehensions:
+#                         change LIST_APPEND and SET_ADD, add MAP_ADD #2183)
+#     Python 3.1a1: 3151 (optimize conditional branches:
+#                         introduce POP_JUMP_IF_FALSE and POP_JUMP_IF_TRUE
+                          #4715)
+#     Python 3.2a1: 3160 (add SETUP_WITH #6101)
+#                   tag: cpython-32
+#     Python 3.2a2: 3170 (add DUP_TOP_TWO, remove DUP_TOPX and ROT_FOUR #9225)
+#                   tag: cpython-32
+#     Python 3.2a3  3180 (add DELETE_DEREF #4617)
+#     Python 3.3a1  3190 (__class__ super closure changed)
+#     Python 3.3a1  3200 (PEP 3155 __qualname__ added #13448)
+#     Python 3.3a1  3210 (added size modulo 2**32 to the pyc header #13645)
+#     Python 3.3a2  3220 (changed PEP 380 implementation #14230)
+#     Python 3.3a4  3230 (revert changes to implicit __class__ closure #14857)
+#     Python 3.4a1  3250 (evaluate positional default arguments before
+#                        keyword-only defaults #16967)
+#     Python 3.4a1  3260 (add LOAD_CLASSDEREF; allow locals of class to override
+#                        free vars #17853)
+#     Python 3.4a1  3270 (various tweaks to the __class__ closure #12370)
+#     Python 3.4a1  3280 (remove implicit class argument)
+#     Python 3.4a4  3290 (changes to __qualname__ computation #19301)
+#     Python 3.4a4  3300 (more changes to __qualname__ computation #19301)
+#     Python 3.4rc2 3310 (alter __qualname__ computation #20625)
+#     Python 3.5a1  3320 (PEP 465: Matrix multiplication operator #21176)
+#     Python 3.5b1  3330 (PEP 448: Additional Unpacking Generalizations #2292)
+#     Python 3.5b2  3340 (fix dictionary display evaluation order #11205)
+#     Python 3.5b3  3350 (add GET_YIELD_FROM_ITER opcode #24400)
+#     Python 3.5.2  3351 (fix BUILD_MAP_UNPACK_WITH_CALL opcode #27286)
+#     Python 3.6a0  3360 (add FORMAT_VALUE opcode #25483)
+#     Python 3.6a1  3361 (lineno delta of code.co_lnotab becomes signed #26107)
+#     Python 3.6a2  3370 (16 bit wordcode #26647)
+#     Python 3.6a2  3371 (add BUILD_CONST_KEY_MAP opcode #27140)
+#     Python 3.6a2  3372 (MAKE_FUNCTION simplification, remove MAKE_CLOSURE
+#                         #27095)
+#     Python 3.6b1  3373 (add BUILD_STRING opcode #27078)
+#     Python 3.6b1  3375 (add SETUP_ANNOTATIONS and STORE_ANNOTATION opcodes
+#                         #27985)
+#     Python 3.6b1  3376 (simplify CALL_FUNCTIONs & BUILD_MAP_UNPACK_WITH_CALL
+                          #27213)
+#     Python 3.6b1  3377 (set __class__ cell from type.__new__ #23722)
+#     Python 3.6b2  3378 (add BUILD_TUPLE_UNPACK_WITH_CALL #28257)
+#     Python 3.6rc1 3379 (more thorough __class__ validation #23722)
+#     Python 3.7a1  3390 (add LOAD_METHOD and CALL_METHOD opcodes #26110)
+#     Python 3.7a2  3391 (update GET_AITER #31709)
+#     Python 3.7a4  3392 (PEP 552: Deterministic pycs #31650)
+#     Python 3.7b1  3393 (remove STORE_ANNOTATION opcode #32550)
+#     Python 3.7b5  3394 (restored docstring as the first stmt in the body;
+#                         this might affected the first line number #32911)
+#     Python 3.8a1  3400 (move frame block handling to compiler #17611)
+#     Python 3.8a1  3401 (add END_ASYNC_FOR #33041)
+#     Python 3.8a1  3410 (PEP570 Python Positional-Only Parameters #36540)
+#     Python 3.8b2  3411 (Reverse evaluation order of key: value in dict
+#                         comprehensions #35224)
+#     Python 3.8b2  3412 (Swap the position of positional args and positional
+#                         only args in ast.arguments #37593)
+#     Python 3.8b4  3413 (Fix "break" and "continue" in "finally" #37830)
+#     Python 3.9a0  3420 (add LOAD_ASSERTION_ERROR #34880)
+#     Python 3.9a0  3421 (simplified bytecode for with blocks #32949)
+#     Python 3.9a0  3422 (remove BEGIN_FINALLY, END_FINALLY, CALL_FINALLY, POP_FINALLY bytecodes #33387)
+#     Python 3.9a2  3423 (add IS_OP, CONTAINS_OP and JUMP_IF_NOT_EXC_MATCH bytecodes #39156)
+#     Python 3.9a2  3424 (simplify bytecodes for *value unpacking)
+#     Python 3.9a2  3425 (simplify bytecodes for **value unpacking)
+#     Python 3.10a1 3430 (Make 'annotations' future by default)
+#     Python 3.10a1 3431 (New line number table format -- PEP 626)
+#     Python 3.10a2 3432 (Function annotation for MAKE_FUNCTION is changed from dict to tuple bpo-42202)
+#     Python 3.10a2 3433 (RERAISE restores f_lasti if oparg != 0)
+#     Python 3.10a6 3434 (PEP 634: Structural Pattern Matching)
+#     Python 3.10a7 3435 Use instruction offsets (as opposed to byte offsets).
+#     Python 3.10b1 3436 (Add GEN_START bytecode #43683)
+#     Python 3.10b1 3437 (Undo making 'annotations' future by default - We like to dance among core devs!)
+#     Python 3.10b1 3438 Safer line number table handling.
+#     Python 3.10b1 3439 (Add ROT_N)
+
+#
+# MAGIC must change whenever the bytecode emitted by the compiler may no
+# longer be understood by older implementations of the eval loop (usually
+# due to the addition of new opcodes).
+#
+# Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
+# in PC/launcher.c must also be updated.
+
+MAGIC_NUMBER = (3439).to_bytes(2, 'little') + b'\r\n'
+_RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little')  # For import.c
+
+_PYCACHE = '__pycache__'
+_OPT = 'opt-'
+
+SOURCE_SUFFIXES = ['.py']
+if _MS_WINDOWS:
+    SOURCE_SUFFIXES.append('.pyw')
+
+EXTENSION_SUFFIXES = _imp.extension_suffixes()
+
+BYTECODE_SUFFIXES = ['.pyc']
+# Deprecated.
+DEBUG_BYTECODE_SUFFIXES = OPTIMIZED_BYTECODE_SUFFIXES = BYTECODE_SUFFIXES
+
+def cache_from_source(path, debug_override=None, *, optimization=None):
+    """Given the path to a .py file, return the path to its .pyc file.
+
+    The .py file does not need to exist; this simply returns the path to the
+    .pyc file calculated as if the .py file were imported.
+
+    The 'optimization' parameter controls the presumed optimization level of
+    the bytecode file. If 'optimization' is not None, the string representation
+    of the argument is taken and verified to be alphanumeric (else ValueError
+    is raised).
+
+    The debug_override parameter is deprecated. If debug_override is not None,
+    a True value is the same as setting 'optimization' to the empty string
+    while a False value is equivalent to setting 'optimization' to '1'.
+
+    If sys.implementation.cache_tag is None then NotImplementedError is raised.
+
+    """
+    if debug_override is not None:
+        _warnings.warn('the debug_override parameter is deprecated; use '
+                       "'optimization' instead", DeprecationWarning)
+        if optimization is not None:
+            message = 'debug_override or optimization must be set to None'
+            raise TypeError(message)
+        optimization = '' if debug_override else 1
+    path = _os.fspath(path)
+    head, tail = _path_split(path)
+    base, sep, rest = tail.rpartition('.')
+    tag = sys.implementation.cache_tag
+    if tag is None:
+        raise NotImplementedError('sys.implementation.cache_tag is None')
+    almost_filename = ''.join([(base if base else rest), sep, tag])
+    if optimization is None:
+        if sys.flags.optimize == 0:
+            optimization = ''
+        else:
+            optimization = sys.flags.optimize
+    optimization = str(optimization)
+    if optimization != '':
+        if not optimization.isalnum():
+            raise ValueError('{!r} is not alphanumeric'.format(optimization))
+        almost_filename = '{}.{}{}'.format(almost_filename, _OPT, optimization)
+    filename = almost_filename + BYTECODE_SUFFIXES[0]
+    if sys.pycache_prefix is not None:
+        # We need an absolute path to the py file to avoid the possibility of
+        # collisions within sys.pycache_prefix, if someone has two different
+        # `foo/bar.py` on their system and they import both of them using the
+        # same sys.pycache_prefix. Let's say sys.pycache_prefix is
+        # `C:\Bytecode`; the idea here is that if we get `Foo\Bar`, we first
+        # make it absolute (`C:\Somewhere\Foo\Bar`), then make it root-relative
+        # (`Somewhere\Foo\Bar`), so we end up placing the bytecode file in an
+        # unambiguous `C:\Bytecode\Somewhere\Foo\Bar\`.
+        if not _path_isabs(head):
+            head = _path_join(_os.getcwd(), head)
+
+        # Strip initial drive from a Windows path. We know we have an absolute
+        # path here, so the second part of the check rules out a POSIX path that
+        # happens to contain a colon at the second character.
+        if head[1] == ':' and head[0] not in path_separators:
+            head = head[2:]
+
+        # Strip initial path separator from `head` to complete the conversion
+        # back to a root-relative path before joining.
+        return _path_join(
+            sys.pycache_prefix,
+            head.lstrip(path_separators),
+            filename,
+        )
+    return _path_join(head, _PYCACHE, filename)
+
+
+def source_from_cache(path):
+    """Given the path to a .pyc. file, return the path to its .py file.
+
+    The .pyc file does not need to exist; this simply returns the path to
+    the .py file calculated to correspond to the .pyc file.  If path does
+    not conform to PEP 3147/488 format, ValueError will be raised. If
+    sys.implementation.cache_tag is None then NotImplementedError is raised.
+
+    """
+    if sys.implementation.cache_tag is None:
+        raise NotImplementedError('sys.implementation.cache_tag is None')
+    path = _os.fspath(path)
+    head, pycache_filename = _path_split(path)
+    found_in_pycache_prefix = False
+    if sys.pycache_prefix is not None:
+        stripped_path = sys.pycache_prefix.rstrip(path_separators)
+        if head.startswith(stripped_path + path_sep):
+            head = head[len(stripped_path):]
+            found_in_pycache_prefix = True
+    if not found_in_pycache_prefix:
+        head, pycache = _path_split(head)
+        if pycache != _PYCACHE:
+            raise ValueError(f'{_PYCACHE} not bottom-level directory in '
+                             f'{path!r}')
+    dot_count = pycache_filename.count('.')
+    if dot_count not in {2, 3}:
+        raise ValueError(f'expected only 2 or 3 dots in {pycache_filename!r}')
+    elif dot_count == 3:
+        optimization = pycache_filename.rsplit('.', 2)[-2]
+        if not optimization.startswith(_OPT):
+            raise ValueError("optimization portion of filename does not start "
+                             f"with {_OPT!r}")
+        opt_level = optimization[len(_OPT):]
+        if not opt_level.isalnum():
+            raise ValueError(f"optimization level {optimization!r} is not an "
+                             "alphanumeric value")
+    base_filename = pycache_filename.partition('.')[0]
+    return _path_join(head, base_filename + SOURCE_SUFFIXES[0])
+
+
+def _get_sourcefile(bytecode_path):
+    """Convert a bytecode file path to a source path (if possible).
+
+    This function exists purely for backwards-compatibility for
+    PyImport_ExecCodeModuleWithFilenames() in the C API.
+
+    """
+    if len(bytecode_path) == 0:
+        return None
+    rest, _, extension = bytecode_path.rpartition('.')
+    if not rest or extension.lower()[-3:-1] != 'py':
+        return bytecode_path
+    try:
+        source_path = source_from_cache(bytecode_path)
+    except (NotImplementedError, ValueError):
+        source_path = bytecode_path[:-1]
+    return source_path if _path_isfile(source_path) else bytecode_path
+
+
+def _get_cached(filename):
+    if filename.endswith(tuple(SOURCE_SUFFIXES)):
+        try:
+            return cache_from_source(filename)
+        except NotImplementedError:
+            pass
+    elif filename.endswith(tuple(BYTECODE_SUFFIXES)):
+        return filename
+    else:
+        return None
+
+
+def _calc_mode(path):
+    """Calculate the mode permissions for a bytecode file."""
+    try:
+        mode = _path_stat(path).st_mode
+    except OSError:
+        mode = 0o666
+    # We always ensure write access so we can update cached files
+    # later even when the source files are read-only on Windows (#6074)
+    mode |= 0o200
+    return mode
+
+
+def _check_name(method):
+    """Decorator to verify that the module being requested matches the one the
+    loader can handle.
+
+    The first argument (self) must define _name which the second argument is
+    compared against. If the comparison fails then ImportError is raised.
+
+    """
+    def _check_name_wrapper(self, name=None, *args, **kwargs):
+        if name is None:
+            name = self.name
+        elif self.name != name:
+            raise ImportError('loader for %s cannot handle %s' %
+                                (self.name, name), name=name)
+        return method(self, name, *args, **kwargs)
+
+    # FIXME: @_check_name is used to define class methods before the
+    # _bootstrap module is set by _set_bootstrap_module().
+    if _bootstrap is not None:
+        _wrap = _bootstrap._wrap
+    else:
+        def _wrap(new, old):
+            for replace in ['__module__', '__name__', '__qualname__', '__doc__']:
+                if hasattr(old, replace):
+                    setattr(new, replace, getattr(old, replace))
+            new.__dict__.update(old.__dict__)
+
+    _wrap(_check_name_wrapper, method)
+    return _check_name_wrapper
+
+
+def _find_module_shim(self, fullname):
+    """Try to find a loader for the specified module by delegating to
+    self.find_loader().
+
+    This method is deprecated in favor of finder.find_spec().
+
+    """
+    _warnings.warn("find_module() is deprecated and "
+                   "slated for removal in Python 3.12; use find_spec() instead",
+                   DeprecationWarning)
+    # Call find_loader(). If it returns a string (indicating this
+    # is a namespace package portion), generate a warning and
+    # return None.
+    loader, portions = self.find_loader(fullname)
+    if loader is None and len(portions):
+        msg = 'Not importing directory {}: missing __init__'
+        _warnings.warn(msg.format(portions[0]), ImportWarning)
+    return loader
+
+
+def _classify_pyc(data, name, exc_details):
+    """Perform basic validity checking of a pyc header and return the flags field,
+    which determines how the pyc should be further validated against the source.
+
+    *data* is the contents of the pyc file. (Only the first 16 bytes are
+    required, though.)
+
+    *name* is the name of the module being imported. It is used for logging.
+
+    *exc_details* is a dictionary passed to ImportError if it raised for
+    improved debugging.
+
+    ImportError is raised when the magic number is incorrect or when the flags
+    field is invalid. EOFError is raised when the data is found to be truncated.
+
+    """
+    magic = data[:4]
+    if magic != MAGIC_NUMBER:
+        message = f'bad magic number in {name!r}: {magic!r}'
+        _bootstrap._verbose_message('{}', message)
+        raise ImportError(message, **exc_details)
+    if len(data) < 16:
+        message = f'reached EOF while reading pyc header of {name!r}'
+        _bootstrap._verbose_message('{}', message)
+        raise EOFError(message)
+    flags = _unpack_uint32(data[4:8])
+    # Only the first two flags are defined.
+    if flags & ~0b11:
+        message = f'invalid flags {flags!r} in {name!r}'
+        raise ImportError(message, **exc_details)
+    return flags
+
+
+def _validate_timestamp_pyc(data, source_mtime, source_size, name,
+                            exc_details):
+    """Validate a pyc against the source last-modified time.
+
+    *data* is the contents of the pyc file. (Only the first 16 bytes are
+    required.)
+
+    *source_mtime* is the last modified timestamp of the source file.
+
+    *source_size* is None or the size of the source file in bytes.
+
+    *name* is the name of the module being imported. It is used for logging.
+
+    *exc_details* is a dictionary passed to ImportError if it raised for
+    improved debugging.
+
+    An ImportError is raised if the bytecode is stale.
+
+    """
+    if _unpack_uint32(data[8:12]) != (source_mtime & 0xFFFFFFFF):
+        message = f'bytecode is stale for {name!r}'
+        _bootstrap._verbose_message('{}', message)
+        raise ImportError(message, **exc_details)
+    if (source_size is not None and
+        _unpack_uint32(data[12:16]) != (source_size & 0xFFFFFFFF)):
+        raise ImportError(f'bytecode is stale for {name!r}', **exc_details)
+
+
+def _validate_hash_pyc(data, source_hash, name, exc_details):
+    """Validate a hash-based pyc by checking the real source hash against the one in
+    the pyc header.
+
+    *data* is the contents of the pyc file. (Only the first 16 bytes are
+    required.)
+
+    *source_hash* is the importlib.util.source_hash() of the source file.
+
+    *name* is the name of the module being imported. It is used for logging.
+
+    *exc_details* is a dictionary passed to ImportError if it raised for
+    improved debugging.
+
+    An ImportError is raised if the bytecode is stale.
+
+    """
+    if data[8:16] != source_hash:
+        raise ImportError(
+            f'hash in bytecode doesn\'t match hash of source {name!r}',
+            **exc_details,
+        )
+
+
+def _compile_bytecode(data, name=None, bytecode_path=None, source_path=None):
+    """Compile bytecode as found in a pyc."""
+    code = marshal.loads(data)
+    if isinstance(code, _code_type):
+        _bootstrap._verbose_message('code object from {!r}', bytecode_path)
+        if source_path is not None:
+            _imp._fix_co_filename(code, source_path)
+        return code
+    else:
+        raise ImportError('Non-code object in {!r}'.format(bytecode_path),
+                          name=name, path=bytecode_path)
+
+
+def _code_to_timestamp_pyc(code, mtime=0, source_size=0):
+    "Produce the data for a timestamp-based pyc."
+    data = bytearray(MAGIC_NUMBER)
+    data.extend(_pack_uint32(0))
+    data.extend(_pack_uint32(mtime))
+    data.extend(_pack_uint32(source_size))
+    data.extend(marshal.dumps(code))
+    return data
+
+
+def _code_to_hash_pyc(code, source_hash, checked=True):
+    "Produce the data for a hash-based pyc."
+    data = bytearray(MAGIC_NUMBER)
+    flags = 0b1 | checked << 1
+    data.extend(_pack_uint32(flags))
+    assert len(source_hash) == 8
+    data.extend(source_hash)
+    data.extend(marshal.dumps(code))
+    return data
+
+
+def decode_source(source_bytes):
+    """Decode bytes representing source code and return the string.
+
+    Universal newline support is used in the decoding.
+    """
+    import tokenize  # To avoid bootstrap issues.
+    source_bytes_readline = _io.BytesIO(source_bytes).readline
+    encoding = tokenize.detect_encoding(source_bytes_readline)
+    newline_decoder = _io.IncrementalNewlineDecoder(None, True)
+    return newline_decoder.decode(source_bytes.decode(encoding[0]))
+
+
+# Module specifications #######################################################
+
+_POPULATE = object()
+
+
+def spec_from_file_location(name, location=None, *, loader=None,
+                            submodule_search_locations=_POPULATE):
+    """Return a module spec based on a file location.
+
+    To indicate that the module is a package, set
+    submodule_search_locations to a list of directory paths.  An
+    empty list is sufficient, though its not otherwise useful to the
+    import system.
+
+    The loader must take a spec as its only __init__() arg.
+
+    """
+    if location is None:
+        # The caller may simply want a partially populated location-
+        # oriented spec.  So we set the location to a bogus value and
+        # fill in as much as we can.
+        location = '<unknown>'
+        if hasattr(loader, 'get_filename'):
+            # ExecutionLoader
+            try:
+                location = loader.get_filename(name)
+            except ImportError:
+                pass
+    else:
+        location = _os.fspath(location)
+        if not _path_isabs(location):
+            try:
+                location = _path_join(_os.getcwd(), location)
+            except OSError:
+                pass
+
+    # If the location is on the filesystem, but doesn't actually exist,
+    # we could return None here, indicating that the location is not
+    # valid.  However, we don't have a good way of testing since an
+    # indirect location (e.g. a zip file or URL) will look like a
+    # non-existent file relative to the filesystem.
+
+    spec = _bootstrap.ModuleSpec(name, loader, origin=location)
+    spec._set_fileattr = True
+
+    # Pick a loader if one wasn't provided.
+    if loader is None:
+        for loader_class, suffixes in _get_supported_file_loaders():
+            if location.endswith(tuple(suffixes)):
+                loader = loader_class(name, location)
+                spec.loader = loader
+                break
+        else:
+            return None
+
+    # Set submodule_search_paths appropriately.
+    if submodule_search_locations is _POPULATE:
+        # Check the loader.
+        if hasattr(loader, 'is_package'):
+            try:
+                is_package = loader.is_package(name)
+            except ImportError:
+                pass
+            else:
+                if is_package:
+                    spec.submodule_search_locations = []
+    else:
+        spec.submodule_search_locations = submodule_search_locations
+    if spec.submodule_search_locations == []:
+        if location:
+            dirname = _path_split(location)[0]
+            spec.submodule_search_locations.append(dirname)
+
+    return spec
+
+
+# Loaders #####################################################################
+
+class WindowsRegistryFinder:
+
+    """Meta path finder for modules declared in the Windows registry."""
+
+    REGISTRY_KEY = (
+        'Software\\Python\\PythonCore\\{sys_version}'
+        '\\Modules\\{fullname}')
+    REGISTRY_KEY_DEBUG = (
+        'Software\\Python\\PythonCore\\{sys_version}'
+        '\\Modules\\{fullname}\\Debug')
+    DEBUG_BUILD = (_MS_WINDOWS and '_d.pyd' in EXTENSION_SUFFIXES)
+
+    @staticmethod
+    def _open_registry(key):
+        try:
+            return winreg.OpenKey(winreg.HKEY_CURRENT_USER, key)
+        except OSError:
+            return winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, key)
+
+    @classmethod
+    def _search_registry(cls, fullname):
+        if cls.DEBUG_BUILD:
+            registry_key = cls.REGISTRY_KEY_DEBUG
+        else:
+            registry_key = cls.REGISTRY_KEY
+        key = registry_key.format(fullname=fullname,
+                                  sys_version='%d.%d' % sys.version_info[:2])
+        try:
+            with cls._open_registry(key) as hkey:
+                filepath = winreg.QueryValue(hkey, '')
+        except OSError:
+            return None
+        return filepath
+
+    @classmethod
+    def find_spec(cls, fullname, path=None, target=None):
+        filepath = cls._search_registry(fullname)
+        if filepath is None:
+            return None
+        try:
+            _path_stat(filepath)
+        except OSError:
+            return None
+        for loader, suffixes in _get_supported_file_loaders():
+            if filepath.endswith(tuple(suffixes)):
+                spec = _bootstrap.spec_from_loader(fullname,
+                                                   loader(fullname, filepath),
+                                                   origin=filepath)
+                return spec
+
+    @classmethod
+    def find_module(cls, fullname, path=None):
+        """Find module named in the registry.
+
+        This method is deprecated.  Use find_spec() instead.
+
+        """
+        _warnings.warn("WindowsRegistryFinder.find_module() is deprecated and "
+                       "slated for removal in Python 3.12; use find_spec() instead",
+                       DeprecationWarning)
+        spec = cls.find_spec(fullname, path)
+        if spec is not None:
+            return spec.loader
+        else:
+            return None
+
+
+class _LoaderBasics:
+
+    """Base class of common code needed by both SourceLoader and
+    SourcelessFileLoader."""
+
+    def is_package(self, fullname):
+        """Concrete implementation of InspectLoader.is_package by checking if
+        the path returned by get_filename has a filename of '__init__.py'."""
+        filename = _path_split(self.get_filename(fullname))[1]
+        filename_base = filename.rsplit('.', 1)[0]
+        tail_name = fullname.rpartition('.')[2]
+        return filename_base == '__init__' and tail_name != '__init__'
+
+    def create_module(self, spec):
+        """Use default semantics for module creation."""
+
+    def exec_module(self, module):
+        """Execute the module."""
+        code = self.get_code(module.__name__)
+        if code is None:
+            raise ImportError('cannot load module {!r} when get_code() '
+                              'returns None'.format(module.__name__))
+        _bootstrap._call_with_frames_removed(exec, code, module.__dict__)
+
+    def load_module(self, fullname):
+        """This method is deprecated."""
+        # Warning implemented in _load_module_shim().
+        return _bootstrap._load_module_shim(self, fullname)
+
+
+class SourceLoader(_LoaderBasics):
+
+    def path_mtime(self, path):
+        """Optional method that returns the modification time (an int) for the
+        specified path (a str).
+
+        Raises OSError when the path cannot be handled.
+        """
+        raise OSError
+
+    def path_stats(self, path):
+        """Optional method returning a metadata dict for the specified
+        path (a str).
+
+        Possible keys:
+        - 'mtime' (mandatory) is the numeric timestamp of last source
+          code modification;
+        - 'size' (optional) is the size in bytes of the source code.
+
+        Implementing this method allows the loader to read bytecode files.
+        Raises OSError when the path cannot be handled.
+        """
+        return {'mtime': self.path_mtime(path)}
+
+    def _cache_bytecode(self, source_path, cache_path, data):
+        """Optional method which writes data (bytes) to a file path (a str).
+
+        Implementing this method allows for the writing of bytecode files.
+
+        The source path is needed in order to correctly transfer permissions
+        """
+        # For backwards compatibility, we delegate to set_data()
+        return self.set_data(cache_path, data)
+
+    def set_data(self, path, data):
+        """Optional method which writes data (bytes) to a file path (a str).
+
+        Implementing this method allows for the writing of bytecode files.
+        """
+
+
+    def get_source(self, fullname):
+        """Concrete implementation of InspectLoader.get_source."""
+        path = self.get_filename(fullname)
+        try:
+            source_bytes = self.get_data(path)
+        except OSError as exc:
+            raise ImportError('source not available through get_data()',
+                              name=fullname) from exc
+        return decode_source(source_bytes)
+
+    def source_to_code(self, data, path, *, _optimize=-1):
+        """Return the code object compiled from source.
+
+        The 'data' argument can be any object type that compile() supports.
+        """
+        return _bootstrap._call_with_frames_removed(compile, data, path, 'exec',
+                                        dont_inherit=True, optimize=_optimize)
+
+    def get_code(self, fullname):
+        """Concrete implementation of InspectLoader.get_code.
+
+        Reading of bytecode requires path_stats to be implemented. To write
+        bytecode, set_data must also be implemented.
+
+        """
+        source_path = self.get_filename(fullname)
+        source_mtime = None
+        source_bytes = None
+        source_hash = None
+        hash_based = False
+        check_source = True
+        try:
+            bytecode_path = cache_from_source(source_path)
+        except NotImplementedError:
+            bytecode_path = None
+        else:
+            try:
+                st = self.path_stats(source_path)
+            except OSError:
+                pass
+            else:
+                source_mtime = int(st['mtime'])
+                try:
+                    data = self.get_data(bytecode_path)
+                except OSError:
+                    pass
+                else:
+                    exc_details = {
+                        'name': fullname,
+                        'path': bytecode_path,
+                    }
+                    try:
+                        flags = _classify_pyc(data, fullname, exc_details)
+                        bytes_data = memoryview(data)[16:]
+                        hash_based = flags & 0b1 != 0
+                        if hash_based:
+                            check_source = flags & 0b10 != 0
+                            if (_imp.check_hash_based_pycs != 'never' and
+                                (check_source or
+                                 _imp.check_hash_based_pycs == 'always')):
+                                source_bytes = self.get_data(source_path)
+                                source_hash = _imp.source_hash(
+                                    _RAW_MAGIC_NUMBER,
+                                    source_bytes,
+                                )
+                                _validate_hash_pyc(data, source_hash, fullname,
+                                                   exc_details)
+                        else:
+                            _validate_timestamp_pyc(
+                                data,
+                                source_mtime,
+                                st['size'],
+                                fullname,
+                                exc_details,
+                            )
+                    except (ImportError, EOFError):
+                        pass
+                    else:
+                        _bootstrap._verbose_message('{} matches {}', bytecode_path,
+                                                    source_path)
+                        return _compile_bytecode(bytes_data, name=fullname,
+                                                 bytecode_path=bytecode_path,
+                                                 source_path=source_path)
+        if source_bytes is None:
+            source_bytes = self.get_data(source_path)
+        code_object = self.source_to_code(source_bytes, source_path)
+        _bootstrap._verbose_message('code object from {}', source_path)
+        if (not sys.dont_write_bytecode and bytecode_path is not None and
+                source_mtime is not None):
+            if hash_based:
+                if source_hash is None:
+                    source_hash = _imp.source_hash(source_bytes)
+                data = _code_to_hash_pyc(code_object, source_hash, check_source)
+            else:
+                data = _code_to_timestamp_pyc(code_object, source_mtime,
+                                              len(source_bytes))
+            try:
+                self._cache_bytecode(source_path, bytecode_path, data)
+            except NotImplementedError:
+                pass
+        return code_object
+
+
+class FileLoader:
+
+    """Base file loader class which implements the loader protocol methods that
+    require file system usage."""
+
+    def __init__(self, fullname, path):
+        """Cache the module name and the path to the file found by the
+        finder."""
+        self.name = fullname
+        self.path = path
+
+    def __eq__(self, other):
+        return (self.__class__ == other.__class__ and
+                self.__dict__ == other.__dict__)
+
+    def __hash__(self):
+        return hash(self.name) ^ hash(self.path)
+
+    @_check_name
+    def load_module(self, fullname):
+        """Load a module from a file.
+
+        This method is deprecated.  Use exec_module() instead.
+
+        """
+        # The only reason for this method is for the name check.
+        # Issue #14857: Avoid the zero-argument form of super so the implementation
+        # of that form can be updated without breaking the frozen module.
+        return super(FileLoader, self).load_module(fullname)
+
+    @_check_name
+    def get_filename(self, fullname):
+        """Return the path to the source file as found by the finder."""
+        return self.path
+
+    def get_data(self, path):
+        """Return the data from path as raw bytes."""
+        if isinstance(self, (SourceLoader, ExtensionFileLoader)):
+            with _io.open_code(str(path)) as file:
+                return file.read()
+        else:
+            with _io.FileIO(path, 'r') as file:
+                return file.read()
+
+    @_check_name
+    def get_resource_reader(self, module):
+        from importlib.readers import FileReader
+        return FileReader(self)
+
+
+class SourceFileLoader(FileLoader, SourceLoader):
+
+    """Concrete implementation of SourceLoader using the file system."""
+
+    def path_stats(self, path):
+        """Return the metadata for the path."""
+        st = _path_stat(path)
+        return {'mtime': st.st_mtime, 'size': st.st_size}
+
+    def _cache_bytecode(self, source_path, bytecode_path, data):
+        # Adapt between the two APIs
+        mode = _calc_mode(source_path)
+        return self.set_data(bytecode_path, data, _mode=mode)
+
+    def set_data(self, path, data, *, _mode=0o666):
+        """Write bytes data to a file."""
+        parent, filename = _path_split(path)
+        path_parts = []
+        # Figure out what directories are missing.
+        while parent and not _path_isdir(parent):
+            parent, part = _path_split(parent)
+            path_parts.append(part)
+        # Create needed directories.
+        for part in reversed(path_parts):
+            parent = _path_join(parent, part)
+            try:
+                _os.mkdir(parent)
+            except FileExistsError:
+                # Probably another Python process already created the dir.
+                continue
+            except OSError as exc:
+                # Could be a permission error, read-only filesystem: just forget
+                # about writing the data.
+                _bootstrap._verbose_message('could not create {!r}: {!r}',
+                                            parent, exc)
+                return
+        try:
+            _write_atomic(path, data, _mode)
+            _bootstrap._verbose_message('created {!r}', path)
+        except OSError as exc:
+            # Same as above: just don't write the bytecode.
+            _bootstrap._verbose_message('could not create {!r}: {!r}', path,
+                                        exc)
+
+
+class SourcelessFileLoader(FileLoader, _LoaderBasics):
+
+    """Loader which handles sourceless file imports."""
+
+    def get_code(self, fullname):
+        path = self.get_filename(fullname)
+        data = self.get_data(path)
+        # Call _classify_pyc to do basic validation of the pyc but ignore the
+        # result. There's no source to check against.
+        exc_details = {
+            'name': fullname,
+            'path': path,
+        }
+        _classify_pyc(data, fullname, exc_details)
+        return _compile_bytecode(
+            memoryview(data)[16:],
+            name=fullname,
+            bytecode_path=path,
+        )
+
+    def get_source(self, fullname):
+        """Return None as there is no source code."""
+        return None
+
+
+class ExtensionFileLoader(FileLoader, _LoaderBasics):
+
+    """Loader for extension modules.
+
+    The constructor is designed to work with FileFinder.
+
+    """
+
+    def __init__(self, name, path):
+        self.name = name
+        self.path = path
+
+    def __eq__(self, other):
+        return (self.__class__ == other.__class__ and
+                self.__dict__ == other.__dict__)
+
+    def __hash__(self):
+        return hash(self.name) ^ hash(self.path)
+
+    def create_module(self, spec):
+        """Create an unitialized extension module"""
+        module = _bootstrap._call_with_frames_removed(
+            _imp.create_dynamic, spec)
+        _bootstrap._verbose_message('extension module {!r} loaded from {!r}',
+                         spec.name, self.path)
+        return module
+
+    def exec_module(self, module):
+        """Initialize an extension module"""
+        _bootstrap._call_with_frames_removed(_imp.exec_dynamic, module)
+        _bootstrap._verbose_message('extension module {!r} executed from {!r}',
+                         self.name, self.path)
+
+    def is_package(self, fullname):
+        """Return True if the extension module is a package."""
+        file_name = _path_split(self.path)[1]
+        return any(file_name == '__init__' + suffix
+                   for suffix in EXTENSION_SUFFIXES)
+
+    def get_code(self, fullname):
+        """Return None as an extension module cannot create a code object."""
+        return None
+
+    def get_source(self, fullname):
+        """Return None as extension modules have no source code."""
+        return None
+
+    @_check_name
+    def get_filename(self, fullname):
+        """Return the path to the source file as found by the finder."""
+        return self.path
+
+
+class _NamespacePath:
+    """Represents a namespace package's path.  It uses the module name
+    to find its parent module, and from there it looks up the parent's
+    __path__.  When this changes, the module's own path is recomputed,
+    using path_finder.  For top-level modules, the parent module's path
+    is sys.path."""
+
+    # When invalidate_caches() is called, this epoch is incremented
+    # https://bugs.python.org/issue45703
+    _epoch = 0
+
+    def __init__(self, name, path, path_finder):
+        self._name = name
+        self._path = path
+        self._last_parent_path = tuple(self._get_parent_path())
+        self._last_epoch = self._epoch
+        self._path_finder = path_finder
+
+    def _find_parent_path_names(self):
+        """Returns a tuple of (parent-module-name, parent-path-attr-name)"""
+        parent, dot, me = self._name.rpartition('.')
+        if dot == '':
+            # This is a top-level module. sys.path contains the parent path.
+            return 'sys', 'path'
+        # Not a top-level module. parent-module.__path__ contains the
+        #  parent path.
+        return parent, '__path__'
+
+    def _get_parent_path(self):
+        parent_module_name, path_attr_name = self._find_parent_path_names()
+        return getattr(sys.modules[parent_module_name], path_attr_name)
+
+    def _recalculate(self):
+        # If the parent's path has changed, recalculate _path
+        parent_path = tuple(self._get_parent_path()) # Make a copy
+        if parent_path != self._last_parent_path or self._epoch != self._last_epoch:
+            spec = self._path_finder(self._name, parent_path)
+            # Note that no changes are made if a loader is returned, but we
+            #  do remember the new parent path
+            if spec is not None and spec.loader is None:
+                if spec.submodule_search_locations:
+                    self._path = spec.submodule_search_locations
+            self._last_parent_path = parent_path     # Save the copy
+            self._last_epoch = self._epoch
+        return self._path
+
+    def __iter__(self):
+        return iter(self._recalculate())
+
+    def __getitem__(self, index):
+        return self._recalculate()[index]
+
+    def __setitem__(self, index, path):
+        self._path[index] = path
+
+    def __len__(self):
+        return len(self._recalculate())
+
+    def __repr__(self):
+        return '_NamespacePath({!r})'.format(self._path)
+
+    def __contains__(self, item):
+        return item in self._recalculate()
+
+    def append(self, item):
+        self._path.append(item)
+
+
+# We use this exclusively in module_from_spec() for backward-compatibility.
+class _NamespaceLoader:
+    def __init__(self, name, path, path_finder):
+        self._path = _NamespacePath(name, path, path_finder)
+
+    @staticmethod
+    def module_repr(module):
+        """Return repr for the module.
+
+        The method is deprecated.  The import machinery does the job itself.
+
+        """
+        _warnings.warn("_NamespaceLoader.module_repr() is deprecated and "
+                       "slated for removal in Python 3.12", DeprecationWarning)
+        return '<module {!r} (namespace)>'.format(module.__name__)
+
+    def is_package(self, fullname):
+        return True
+
+    def get_source(self, fullname):
+        return ''
+
+    def get_code(self, fullname):
+        return compile('', '<string>', 'exec', dont_inherit=True)
+
+    def create_module(self, spec):
+        """Use default semantics for module creation."""
+
+    def exec_module(self, module):
+        pass
+
+    def load_module(self, fullname):
+        """Load a namespace module.
+
+        This method is deprecated.  Use exec_module() instead.
+
+        """
+        # The import system never calls this method.
+        _bootstrap._verbose_message('namespace module loaded with path {!r}',
+                                    self._path)
+        # Warning implemented in _load_module_shim().
+        return _bootstrap._load_module_shim(self, fullname)
+
+    def get_resource_reader(self, module):
+        from importlib.readers import NamespaceReader
+        return NamespaceReader(self._path)
+
+
+# Finders #####################################################################
+
+class PathFinder:
+
+    """Meta path finder for sys.path and package __path__ attributes."""
+
+    @staticmethod
+    def invalidate_caches():
+        """Call the invalidate_caches() method on all path entry finders
+        stored in sys.path_importer_caches (where implemented)."""
+        for name, finder in list(sys.path_importer_cache.items()):
+            if finder is None:
+                del sys.path_importer_cache[name]
+            elif hasattr(finder, 'invalidate_caches'):
+                finder.invalidate_caches()
+        # Also invalidate the caches of _NamespacePaths
+        # https://bugs.python.org/issue45703
+        _NamespacePath._epoch += 1
+
+    @staticmethod
+    def _path_hooks(path):
+        """Search sys.path_hooks for a finder for 'path'."""
+        if sys.path_hooks is not None and not sys.path_hooks:
+            _warnings.warn('sys.path_hooks is empty', ImportWarning)
+        for hook in sys.path_hooks:
+            try:
+                return hook(path)
+            except ImportError:
+                continue
+        else:
+            return None
+
+    @classmethod
+    def _path_importer_cache(cls, path):
+        """Get the finder for the path entry from sys.path_importer_cache.
+
+        If the path entry is not in the cache, find the appropriate finder
+        and cache it. If no finder is available, store None.
+
+        """
+        if path == '':
+            try:
+                path = _os.getcwd()
+            except FileNotFoundError:
+                # Don't cache the failure as the cwd can easily change to
+                # a valid directory later on.
+                return None
+        try:
+            finder = sys.path_importer_cache[path]
+        except KeyError:
+            finder = cls._path_hooks(path)
+            sys.path_importer_cache[path] = finder
+        return finder
+
+    @classmethod
+    def _legacy_get_spec(cls, fullname, finder):
+        # This would be a good place for a DeprecationWarning if
+        # we ended up going that route.
+        if hasattr(finder, 'find_loader'):
+            msg = (f"{_bootstrap._object_name(finder)}.find_spec() not found; "
+                    "falling back to find_loader()")
+            _warnings.warn(msg, ImportWarning)
+            loader, portions = finder.find_loader(fullname)
+        else:
+            msg = (f"{_bootstrap._object_name(finder)}.find_spec() not found; "
+                    "falling back to find_module()")
+            _warnings.warn(msg, ImportWarning)
+            loader = finder.find_module(fullname)
+            portions = []
+        if loader is not None:
+            return _bootstrap.spec_from_loader(fullname, loader)
+        spec = _bootstrap.ModuleSpec(fullname, None)
+        spec.submodule_search_locations = portions
+        return spec
+
+    @classmethod
+    def _get_spec(cls, fullname, path, target=None):
+        """Find the loader or namespace_path for this module/package name."""
+        # If this ends up being a namespace package, namespace_path is
+        #  the list of paths that will become its __path__
+        namespace_path = []
+        for entry in path:
+            if not isinstance(entry, (str, bytes)):
+                continue
+            finder = cls._path_importer_cache(entry)
+            if finder is not None:
+                if hasattr(finder, 'find_spec'):
+                    spec = finder.find_spec(fullname, target)
+                else:
+                    spec = cls._legacy_get_spec(fullname, finder)
+                if spec is None:
+                    continue
+                if spec.loader is not None:
+                    return spec
+                portions = spec.submodule_search_locations
+                if portions is None:
+                    raise ImportError('spec missing loader')
+                # This is possibly part of a namespace package.
+                #  Remember these path entries (if any) for when we
+                #  create a namespace package, and continue iterating
+                #  on path.
+                namespace_path.extend(portions)
+        else:
+            spec = _bootstrap.ModuleSpec(fullname, None)
+            spec.submodule_search_locations = namespace_path
+            return spec
+
+    @classmethod
+    def find_spec(cls, fullname, path=None, target=None):
+        """Try to find a spec for 'fullname' on sys.path or 'path'.
+
+        The search is based on sys.path_hooks and sys.path_importer_cache.
+        """
+        if path is None:
+            path = sys.path
+        spec = cls._get_spec(fullname, path, target)
+        if spec is None:
+            return None
+        elif spec.loader is None:
+            namespace_path = spec.submodule_search_locations
+            if namespace_path:
+                # We found at least one namespace path.  Return a spec which
+                # can create the namespace package.
+                spec.origin = None
+                spec.submodule_search_locations = _NamespacePath(fullname, namespace_path, cls._get_spec)
+                return spec
+            else:
+                return None
+        else:
+            return spec
+
+    @classmethod
+    def find_module(cls, fullname, path=None):
+        """find the module on sys.path or 'path' based on sys.path_hooks and
+        sys.path_importer_cache.
+
+        This method is deprecated.  Use find_spec() instead.
+
+        """
+        _warnings.warn("PathFinder.find_module() is deprecated and "
+                       "slated for removal in Python 3.12; use find_spec() instead",
+                       DeprecationWarning)
+        spec = cls.find_spec(fullname, path)
+        if spec is None:
+            return None
+        return spec.loader
+
+    @staticmethod
+    def find_distributions(*args, **kwargs):
+        """
+        Find distributions.
+
+        Return an iterable of all Distribution instances capable of
+        loading the metadata for packages matching ``context.name``
+        (or all names if ``None`` indicated) along the paths in the list
+        of directories ``context.path``.
+        """
+        from importlib.metadata import MetadataPathFinder
+        return MetadataPathFinder.find_distributions(*args, **kwargs)
+
+
+class FileFinder:
+
+    """File-based finder.
+
+    Interactions with the file system are cached for performance, being
+    refreshed when the directory the finder is handling has been modified.
+
+    """
+
+    def __init__(self, path, *loader_details):
+        """Initialize with the path to search on and a variable number of
+        2-tuples containing the loader and the file suffixes the loader
+        recognizes."""
+        loaders = []
+        for loader, suffixes in loader_details:
+            loaders.extend((suffix, loader) for suffix in suffixes)
+        self._loaders = loaders
+        # Base (directory) path
+        self.path = path or '.'
+        if not _path_isabs(self.path):
+            self.path = _path_join(_os.getcwd(), self.path)
+        self._path_mtime = -1
+        self._path_cache = set()
+        self._relaxed_path_cache = set()
+
+    def invalidate_caches(self):
+        """Invalidate the directory mtime."""
+        self._path_mtime = -1
+
+    find_module = _find_module_shim
+
+    def find_loader(self, fullname):
+        """Try to find a loader for the specified module, or the namespace
+        package portions. Returns (loader, list-of-portions).
+
+        This method is deprecated.  Use find_spec() instead.
+
+        """
+        _warnings.warn("FileFinder.find_loader() is deprecated and "
+                       "slated for removal in Python 3.12; use find_spec() instead",
+                       DeprecationWarning)
+        spec = self.find_spec(fullname)
+        if spec is None:
+            return None, []
+        return spec.loader, spec.submodule_search_locations or []
+
+    def _get_spec(self, loader_class, fullname, path, smsl, target):
+        loader = loader_class(fullname, path)
+        return spec_from_file_location(fullname, path, loader=loader,
+                                       submodule_search_locations=smsl)
+
+    def find_spec(self, fullname, target=None):
+        """Try to find a spec for the specified module.
+
+        Returns the matching spec, or None if not found.
+        """
+        is_namespace = False
+        tail_module = fullname.rpartition('.')[2]
+        try:
+            mtime = _path_stat(self.path or _os.getcwd()).st_mtime
+        except OSError:
+            mtime = -1
+        if mtime != self._path_mtime:
+            self._fill_cache()
+            self._path_mtime = mtime
+        # tail_module keeps the original casing, for __file__ and friends
+        if _relax_case():
+            cache = self._relaxed_path_cache
+            cache_module = tail_module.lower()
+        else:
+            cache = self._path_cache
+            cache_module = tail_module
+        # Check if the module is the name of a directory (and thus a package).
+        if cache_module in cache:
+            base_path = _path_join(self.path, tail_module)
+            for suffix, loader_class in self._loaders:
+                init_filename = '__init__' + suffix
+                full_path = _path_join(base_path, init_filename)
+                if _path_isfile(full_path):
+                    return self._get_spec(loader_class, fullname, full_path, [base_path], target)
+            else:
+                # If a namespace package, return the path if we don't
+                #  find a module in the next section.
+                is_namespace = _path_isdir(base_path)
+        # Check for a file w/ a proper suffix exists.
+        for suffix, loader_class in self._loaders:
+            try:
+                full_path = _path_join(self.path, tail_module + suffix)
+            except ValueError:
+                return None
+            _bootstrap._verbose_message('trying {}', full_path, verbosity=2)
+            if cache_module + suffix in cache:
+                if _path_isfile(full_path):
+                    return self._get_spec(loader_class, fullname, full_path,
+                                          None, target)
+        if is_namespace:
+            _bootstrap._verbose_message('possible namespace for {}', base_path)
+            spec = _bootstrap.ModuleSpec(fullname, None)
+            spec.submodule_search_locations = [base_path]
+            return spec
+        return None
+
+    def _fill_cache(self):
+        """Fill the cache of potential modules and packages for this directory."""
+        path = self.path
+        try:
+            contents = _os.listdir(path or _os.getcwd())
+        except (FileNotFoundError, PermissionError, NotADirectoryError):
+            # Directory has either been removed, turned into a file, or made
+            # unreadable.
+            contents = []
+        # We store two cached versions, to handle runtime changes of the
+        # PYTHONCASEOK environment variable.
+        if not sys.platform.startswith('win'):
+            self._path_cache = set(contents)
+        else:
+            # Windows users can import modules with case-insensitive file
+            # suffixes (for legacy reasons). Make the suffix lowercase here
+            # so it's done once instead of for every import. This is safe as
+            # the specified suffixes to check against are always specified in a
+            # case-sensitive manner.
+            lower_suffix_contents = set()
+            for item in contents:
+                name, dot, suffix = item.partition('.')
+                if dot:
+                    new_name = '{}.{}'.format(name, suffix.lower())
+                else:
+                    new_name = name
+                lower_suffix_contents.add(new_name)
+            self._path_cache = lower_suffix_contents
+        if sys.platform.startswith(_CASE_INSENSITIVE_PLATFORMS):
+            self._relaxed_path_cache = {fn.lower() for fn in contents}
+
+    @classmethod
+    def path_hook(cls, *loader_details):
+        """A class method which returns a closure to use on sys.path_hook
+        which will return an instance using the specified loaders and the path
+        called on the closure.
+
+        If the path called on the closure is not a directory, ImportError is
+        raised.
+
+        """
+        def path_hook_for_FileFinder(path):
+            """Path hook for importlib.machinery.FileFinder."""
+            if not _path_isdir(path):
+                raise ImportError('only directories are supported', path=path)
+            return cls(path, *loader_details)
+
+        return path_hook_for_FileFinder
+
+    def __repr__(self):
+        return 'FileFinder({!r})'.format(self.path)
+
+
+# Import setup ###############################################################
+
+def _fix_up_module(ns, name, pathname, cpathname=None):
+    # This function is used by PyImport_ExecCodeModuleObject().
+    loader = ns.get('__loader__')
+    spec = ns.get('__spec__')
+    if not loader:
+        if spec:
+            loader = spec.loader
+        elif pathname == cpathname:
+            loader = SourcelessFileLoader(name, pathname)
+        else:
+            loader = SourceFileLoader(name, pathname)
+    if not spec:
+        spec = spec_from_file_location(name, pathname, loader=loader)
+    try:
+        ns['__spec__'] = spec
+        ns['__loader__'] = loader
+        ns['__file__'] = pathname
+        ns['__cached__'] = cpathname
+    except Exception:
+        # Not important enough to report.
+        pass
+
+
+def _get_supported_file_loaders():
+    """Returns a list of file-based module loaders.
+
+    Each item is a tuple (loader, suffixes).
+    """
+    extensions = ExtensionFileLoader, _imp.extension_suffixes()
+    source = SourceFileLoader, SOURCE_SUFFIXES
+    bytecode = SourcelessFileLoader, BYTECODE_SUFFIXES
+    return [extensions, source, bytecode]
+
+
+def _set_bootstrap_module(_bootstrap_module):
+    global _bootstrap
+    _bootstrap = _bootstrap_module
+
+
+def _install(_bootstrap_module):
+    """Install the path-based import components."""
+    _set_bootstrap_module(_bootstrap_module)
+    supported_loaders = _get_supported_file_loaders()
+    sys.path_hooks.extend([FileFinder.path_hook(*supported_loaders)])
+    sys.meta_path.append(PathFinder)

parrot/lib/python3.10/importlib/util.py

@@ -0,0 +1,302 @@
+"""Utility code for constructing importers, etc."""
+from ._abc import Loader
+from ._bootstrap import module_from_spec
+from ._bootstrap import _resolve_name
+from ._bootstrap import spec_from_loader
+from ._bootstrap import _find_spec
+from ._bootstrap_external import MAGIC_NUMBER
+from ._bootstrap_external import _RAW_MAGIC_NUMBER
+from ._bootstrap_external import cache_from_source
+from ._bootstrap_external import decode_source
+from ._bootstrap_external import source_from_cache
+from ._bootstrap_external import spec_from_file_location
+
+from contextlib import contextmanager
+import _imp
+import functools
+import sys
+import types
+import warnings
+
+
+def source_hash(source_bytes):
+    "Return the hash of *source_bytes* as used in hash-based pyc files."
+    return _imp.source_hash(_RAW_MAGIC_NUMBER, source_bytes)
+
+
+def resolve_name(name, package):
+    """Resolve a relative module name to an absolute one."""
+    if not name.startswith('.'):
+        return name
+    elif not package:
+        raise ImportError(f'no package specified for {repr(name)} '
+                          '(required for relative module names)')
+    level = 0
+    for character in name:
+        if character != '.':
+            break
+        level += 1
+    return _resolve_name(name[level:], package, level)
+
+
+def _find_spec_from_path(name, path=None):
+    """Return the spec for the specified module.
+
+    First, sys.modules is checked to see if the module was already imported. If
+    so, then sys.modules[name].__spec__ is returned. If that happens to be
+    set to None, then ValueError is raised. If the module is not in
+    sys.modules, then sys.meta_path is searched for a suitable spec with the
+    value of 'path' given to the finders. None is returned if no spec could
+    be found.
+
+    Dotted names do not have their parent packages implicitly imported. You will
+    most likely need to explicitly import all parent packages in the proper
+    order for a submodule to get the correct spec.
+
+    """
+    if name not in sys.modules:
+        return _find_spec(name, path)
+    else:
+        module = sys.modules[name]
+        if module is None:
+            return None
+        try:
+            spec = module.__spec__
+        except AttributeError:
+            raise ValueError('{}.__spec__ is not set'.format(name)) from None
+        else:
+            if spec is None:
+                raise ValueError('{}.__spec__ is None'.format(name))
+            return spec
+
+
+def find_spec(name, package=None):
+    """Return the spec for the specified module.
+
+    First, sys.modules is checked to see if the module was already imported. If
+    so, then sys.modules[name].__spec__ is returned. If that happens to be
+    set to None, then ValueError is raised. If the module is not in
+    sys.modules, then sys.meta_path is searched for a suitable spec with the
+    value of 'path' given to the finders. None is returned if no spec could
+    be found.
+
+    If the name is for submodule (contains a dot), the parent module is
+    automatically imported.
+
+    The name and package arguments work the same as importlib.import_module().
+    In other words, relative module names (with leading dots) work.
+
+    """
+    fullname = resolve_name(name, package) if name.startswith('.') else name
+    if fullname not in sys.modules:
+        parent_name = fullname.rpartition('.')[0]
+        if parent_name:
+            parent = __import__(parent_name, fromlist=['__path__'])
+            try:
+                parent_path = parent.__path__
+            except AttributeError as e:
+                raise ModuleNotFoundError(
+                    f"__path__ attribute not found on {parent_name!r} "
+                    f"while trying to find {fullname!r}", name=fullname) from e
+        else:
+            parent_path = None
+        return _find_spec(fullname, parent_path)
+    else:
+        module = sys.modules[fullname]
+        if module is None:
+            return None
+        try:
+            spec = module.__spec__
+        except AttributeError:
+            raise ValueError('{}.__spec__ is not set'.format(name)) from None
+        else:
+            if spec is None:
+                raise ValueError('{}.__spec__ is None'.format(name))
+            return spec
+
+
+@contextmanager
+def _module_to_load(name):
+    is_reload = name in sys.modules
+
+    module = sys.modules.get(name)
+    if not is_reload:
+        # This must be done before open() is called as the 'io' module
+        # implicitly imports 'locale' and would otherwise trigger an
+        # infinite loop.
+        module = type(sys)(name)
+        # This must be done before putting the module in sys.modules
+        # (otherwise an optimization shortcut in import.c becomes wrong)
+        module.__initializing__ = True
+        sys.modules[name] = module
+    try:
+        yield module
+    except Exception:
+        if not is_reload:
+            try:
+                del sys.modules[name]
+            except KeyError:
+                pass
+    finally:
+        module.__initializing__ = False
+
+
+def set_package(fxn):
+    """Set __package__ on the returned module.
+
+    This function is deprecated.
+
+    """
+    @functools.wraps(fxn)
+    def set_package_wrapper(*args, **kwargs):
+        warnings.warn('The import system now takes care of this automatically; '
+                      'this decorator is slated for removal in Python 3.12',
+                      DeprecationWarning, stacklevel=2)
+        module = fxn(*args, **kwargs)
+        if getattr(module, '__package__', None) is None:
+            module.__package__ = module.__name__
+            if not hasattr(module, '__path__'):
+                module.__package__ = module.__package__.rpartition('.')[0]
+        return module
+    return set_package_wrapper
+
+
+def set_loader(fxn):
+    """Set __loader__ on the returned module.
+
+    This function is deprecated.
+
+    """
+    @functools.wraps(fxn)
+    def set_loader_wrapper(self, *args, **kwargs):
+        warnings.warn('The import system now takes care of this automatically; '
+                      'this decorator is slated for removal in Python 3.12',
+                      DeprecationWarning, stacklevel=2)
+        module = fxn(self, *args, **kwargs)
+        if getattr(module, '__loader__', None) is None:
+            module.__loader__ = self
+        return module
+    return set_loader_wrapper
+
+
+def module_for_loader(fxn):
+    """Decorator to handle selecting the proper module for loaders.
+
+    The decorated function is passed the module to use instead of the module
+    name. The module passed in to the function is either from sys.modules if
+    it already exists or is a new module. If the module is new, then __name__
+    is set the first argument to the method, __loader__ is set to self, and
+    __package__ is set accordingly (if self.is_package() is defined) will be set
+    before it is passed to the decorated function (if self.is_package() does
+    not work for the module it will be set post-load).
+
+    If an exception is raised and the decorator created the module it is
+    subsequently removed from sys.modules.
+
+    The decorator assumes that the decorated function takes the module name as
+    the second argument.
+
+    """
+    warnings.warn('The import system now takes care of this automatically; '
+                  'this decorator is slated for removal in Python 3.12',
+                  DeprecationWarning, stacklevel=2)
+    @functools.wraps(fxn)
+    def module_for_loader_wrapper(self, fullname, *args, **kwargs):
+        with _module_to_load(fullname) as module:
+            module.__loader__ = self
+            try:
+                is_package = self.is_package(fullname)
+            except (ImportError, AttributeError):
+                pass
+            else:
+                if is_package:
+                    module.__package__ = fullname
+                else:
+                    module.__package__ = fullname.rpartition('.')[0]
+            # If __package__ was not set above, __import__() will do it later.
+            return fxn(self, module, *args, **kwargs)
+
+    return module_for_loader_wrapper
+
+
+class _LazyModule(types.ModuleType):
+
+    """A subclass of the module type which triggers loading upon attribute access."""
+
+    def __getattribute__(self, attr):
+        """Trigger the load of the module and return the attribute."""
+        # All module metadata must be garnered from __spec__ in order to avoid
+        # using mutated values.
+        # Stop triggering this method.
+        self.__class__ = types.ModuleType
+        # Get the original name to make sure no object substitution occurred
+        # in sys.modules.
+        original_name = self.__spec__.name
+        # Figure out exactly what attributes were mutated between the creation
+        # of the module and now.
+        attrs_then = self.__spec__.loader_state['__dict__']
+        attrs_now = self.__dict__
+        attrs_updated = {}
+        for key, value in attrs_now.items():
+            # Code that set the attribute may have kept a reference to the
+            # assigned object, making identity more important than equality.
+            if key not in attrs_then:
+                attrs_updated[key] = value
+            elif id(attrs_now[key]) != id(attrs_then[key]):
+                attrs_updated[key] = value
+        self.__spec__.loader.exec_module(self)
+        # If exec_module() was used directly there is no guarantee the module
+        # object was put into sys.modules.
+        if original_name in sys.modules:
+            if id(self) != id(sys.modules[original_name]):
+                raise ValueError(f"module object for {original_name!r} "
+                                  "substituted in sys.modules during a lazy "
+                                  "load")
+        # Update after loading since that's what would happen in an eager
+        # loading situation.
+        self.__dict__.update(attrs_updated)
+        return getattr(self, attr)
+
+    def __delattr__(self, attr):
+        """Trigger the load and then perform the deletion."""
+        # To trigger the load and raise an exception if the attribute
+        # doesn't exist.
+        self.__getattribute__(attr)
+        delattr(self, attr)
+
+
+class LazyLoader(Loader):
+
+    """A loader that creates a module which defers loading until attribute access."""
+
+    @staticmethod
+    def __check_eager_loader(loader):
+        if not hasattr(loader, 'exec_module'):
+            raise TypeError('loader must define exec_module()')
+
+    @classmethod
+    def factory(cls, loader):
+        """Construct a callable which returns the eager loader made lazy."""
+        cls.__check_eager_loader(loader)
+        return lambda *args, **kwargs: cls(loader(*args, **kwargs))
+
+    def __init__(self, loader):
+        self.__check_eager_loader(loader)
+        self.loader = loader
+
+    def create_module(self, spec):
+        return self.loader.create_module(spec)
+
+    def exec_module(self, module):
+        """Make the module load lazily."""
+        module.__spec__.loader = self.loader
+        module.__loader__ = self.loader
+        # Don't need to worry about deep-copying as trying to set an attribute
+        # on an object would have triggered the load,
+        # e.g. ``module.__spec__.loader = None`` would trigger a load from
+        # trying to access module.__spec__.
+        loader_state = {}
+        loader_state['__dict__'] = module.__dict__.copy()
+        loader_state['__class__'] = module.__class__
+        module.__spec__.loader_state = loader_state
+        module.__class__ = _LazyModule

parrot/lib/python3.10/logging/config.py

@@ -0,0 +1,947 @@
+# Copyright 2001-2019 by Vinay Sajip. All Rights Reserved.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose and without fee is hereby granted,
+# provided that the above copyright notice appear in all copies and that
+# both that copyright notice and this permission notice appear in
+# supporting documentation, and that the name of Vinay Sajip
+# not be used in advertising or publicity pertaining to distribution
+# of the software without specific, written prior permission.
+# VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+# VINAY SAJIP BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+# IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""
+Configuration functions for the logging package for Python. The core package
+is based on PEP 282 and comments thereto in comp.lang.python, and influenced
+by Apache's log4j system.
+
+Copyright (C) 2001-2019 Vinay Sajip. All Rights Reserved.
+
+To use, simply 'import logging' and log away!
+"""
+
+import errno
+import io
+import logging
+import logging.handlers
+import re
+import struct
+import sys
+import threading
+import traceback
+
+from socketserver import ThreadingTCPServer, StreamRequestHandler
+
+
+DEFAULT_LOGGING_CONFIG_PORT = 9030
+
+RESET_ERROR = errno.ECONNRESET
+
+#
+#   The following code implements a socket listener for on-the-fly
+#   reconfiguration of logging.
+#
+#   _listener holds the server object doing the listening
+_listener = None
+
+def fileConfig(fname, defaults=None, disable_existing_loggers=True, encoding=None):
+    """
+    Read the logging configuration from a ConfigParser-format file.
+
+    This can be called several times from an application, allowing an end user
+    the ability to select from various pre-canned configurations (if the
+    developer provides a mechanism to present the choices and load the chosen
+    configuration).
+    """
+    import configparser
+
+    if isinstance(fname, configparser.RawConfigParser):
+        cp = fname
+    else:
+        cp = configparser.ConfigParser(defaults)
+        if hasattr(fname, 'readline'):
+            cp.read_file(fname)
+        else:
+            encoding = io.text_encoding(encoding)
+            cp.read(fname, encoding=encoding)
+
+    formatters = _create_formatters(cp)
+
+    # critical section
+    logging._acquireLock()
+    try:
+        _clearExistingHandlers()
+
+        # Handlers add themselves to logging._handlers
+        handlers = _install_handlers(cp, formatters)
+        _install_loggers(cp, handlers, disable_existing_loggers)
+    finally:
+        logging._releaseLock()
+
+
+def _resolve(name):
+    """Resolve a dotted name to a global object."""
+    name = name.split('.')
+    used = name.pop(0)
+    found = __import__(used)
+    for n in name:
+        used = used + '.' + n
+        try:
+            found = getattr(found, n)
+        except AttributeError:
+            __import__(used)
+            found = getattr(found, n)
+    return found
+
+def _strip_spaces(alist):
+    return map(str.strip, alist)
+
+def _create_formatters(cp):
+    """Create and return formatters"""
+    flist = cp["formatters"]["keys"]
+    if not len(flist):
+        return {}
+    flist = flist.split(",")
+    flist = _strip_spaces(flist)
+    formatters = {}
+    for form in flist:
+        sectname = "formatter_%s" % form
+        fs = cp.get(sectname, "format", raw=True, fallback=None)
+        dfs = cp.get(sectname, "datefmt", raw=True, fallback=None)
+        stl = cp.get(sectname, "style", raw=True, fallback='%')
+        c = logging.Formatter
+        class_name = cp[sectname].get("class")
+        if class_name:
+            c = _resolve(class_name)
+        f = c(fs, dfs, stl)
+        formatters[form] = f
+    return formatters
+
+
+def _install_handlers(cp, formatters):
+    """Install and return handlers"""
+    hlist = cp["handlers"]["keys"]
+    if not len(hlist):
+        return {}
+    hlist = hlist.split(",")
+    hlist = _strip_spaces(hlist)
+    handlers = {}
+    fixups = [] #for inter-handler references
+    for hand in hlist:
+        section = cp["handler_%s" % hand]
+        klass = section["class"]
+        fmt = section.get("formatter", "")
+        try:
+            klass = eval(klass, vars(logging))
+        except (AttributeError, NameError):
+            klass = _resolve(klass)
+        args = section.get("args", '()')
+        args = eval(args, vars(logging))
+        kwargs = section.get("kwargs", '{}')
+        kwargs = eval(kwargs, vars(logging))
+        h = klass(*args, **kwargs)
+        h.name = hand
+        if "level" in section:
+            level = section["level"]
+            h.setLevel(level)
+        if len(fmt):
+            h.setFormatter(formatters[fmt])
+        if issubclass(klass, logging.handlers.MemoryHandler):
+            target = section.get("target", "")
+            if len(target): #the target handler may not be loaded yet, so keep for later...
+                fixups.append((h, target))
+        handlers[hand] = h
+    #now all handlers are loaded, fixup inter-handler references...
+    for h, t in fixups:
+        h.setTarget(handlers[t])
+    return handlers
+
+def _handle_existing_loggers(existing, child_loggers, disable_existing):
+    """
+    When (re)configuring logging, handle loggers which were in the previous
+    configuration but are not in the new configuration. There's no point
+    deleting them as other threads may continue to hold references to them;
+    and by disabling them, you stop them doing any logging.
+
+    However, don't disable children of named loggers, as that's probably not
+    what was intended by the user. Also, allow existing loggers to NOT be
+    disabled if disable_existing is false.
+    """
+    root = logging.root
+    for log in existing:
+        logger = root.manager.loggerDict[log]
+        if log in child_loggers:
+            if not isinstance(logger, logging.PlaceHolder):
+                logger.setLevel(logging.NOTSET)
+                logger.handlers = []
+                logger.propagate = True
+        else:
+            logger.disabled = disable_existing
+
+def _install_loggers(cp, handlers, disable_existing):
+    """Create and install loggers"""
+
+    # configure the root first
+    llist = cp["loggers"]["keys"]
+    llist = llist.split(",")
+    llist = list(_strip_spaces(llist))
+    llist.remove("root")
+    section = cp["logger_root"]
+    root = logging.root
+    log = root
+    if "level" in section:
+        level = section["level"]
+        log.setLevel(level)
+    for h in root.handlers[:]:
+        root.removeHandler(h)
+    hlist = section["handlers"]
+    if len(hlist):
+        hlist = hlist.split(",")
+        hlist = _strip_spaces(hlist)
+        for hand in hlist:
+            log.addHandler(handlers[hand])
+
+    #and now the others...
+    #we don't want to lose the existing loggers,
+    #since other threads may have pointers to them.
+    #existing is set to contain all existing loggers,
+    #and as we go through the new configuration we
+    #remove any which are configured. At the end,
+    #what's left in existing is the set of loggers
+    #which were in the previous configuration but
+    #which are not in the new configuration.
+    existing = list(root.manager.loggerDict.keys())
+    #The list needs to be sorted so that we can
+    #avoid disabling child loggers of explicitly
+    #named loggers. With a sorted list it is easier
+    #to find the child loggers.
+    existing.sort()
+    #We'll keep the list of existing loggers
+    #which are children of named loggers here...
+    child_loggers = []
+    #now set up the new ones...
+    for log in llist:
+        section = cp["logger_%s" % log]
+        qn = section["qualname"]
+        propagate = section.getint("propagate", fallback=1)
+        logger = logging.getLogger(qn)
+        if qn in existing:
+            i = existing.index(qn) + 1 # start with the entry after qn
+            prefixed = qn + "."
+            pflen = len(prefixed)
+            num_existing = len(existing)
+            while i < num_existing:
+                if existing[i][:pflen] == prefixed:
+                    child_loggers.append(existing[i])
+                i += 1
+            existing.remove(qn)
+        if "level" in section:
+            level = section["level"]
+            logger.setLevel(level)
+        for h in logger.handlers[:]:
+            logger.removeHandler(h)
+        logger.propagate = propagate
+        logger.disabled = 0
+        hlist = section["handlers"]
+        if len(hlist):
+            hlist = hlist.split(",")
+            hlist = _strip_spaces(hlist)
+            for hand in hlist:
+                logger.addHandler(handlers[hand])
+
+    #Disable any old loggers. There's no point deleting
+    #them as other threads may continue to hold references
+    #and by disabling them, you stop them doing any logging.
+    #However, don't disable children of named loggers, as that's
+    #probably not what was intended by the user.
+    #for log in existing:
+    #    logger = root.manager.loggerDict[log]
+    #    if log in child_loggers:
+    #        logger.level = logging.NOTSET
+    #        logger.handlers = []
+    #        logger.propagate = 1
+    #    elif disable_existing_loggers:
+    #        logger.disabled = 1
+    _handle_existing_loggers(existing, child_loggers, disable_existing)
+
+
+def _clearExistingHandlers():
+    """Clear and close existing handlers"""
+    logging._handlers.clear()
+    logging.shutdown(logging._handlerList[:])
+    del logging._handlerList[:]
+
+
+IDENTIFIER = re.compile('^[a-z_][a-z0-9_]*$', re.I)
+
+
+def valid_ident(s):
+    m = IDENTIFIER.match(s)
+    if not m:
+        raise ValueError('Not a valid Python identifier: %r' % s)
+    return True
+
+
+class ConvertingMixin(object):
+    """For ConvertingXXX's, this mixin class provides common functions"""
+
+    def convert_with_key(self, key, value, replace=True):
+        result = self.configurator.convert(value)
+        #If the converted value is different, save for next time
+        if value is not result:
+            if replace:
+                self[key] = result
+            if type(result) in (ConvertingDict, ConvertingList,
+                               ConvertingTuple):
+                result.parent = self
+                result.key = key
+        return result
+
+    def convert(self, value):
+        result = self.configurator.convert(value)
+        if value is not result:
+            if type(result) in (ConvertingDict, ConvertingList,
+                               ConvertingTuple):
+                result.parent = self
+        return result
+
+
+# The ConvertingXXX classes are wrappers around standard Python containers,
+# and they serve to convert any suitable values in the container. The
+# conversion converts base dicts, lists and tuples to their wrapped
+# equivalents, whereas strings which match a conversion format are converted
+# appropriately.
+#
+# Each wrapper should have a configurator attribute holding the actual
+# configurator to use for conversion.
+
+class ConvertingDict(dict, ConvertingMixin):
+    """A converting dictionary wrapper."""
+
+    def __getitem__(self, key):
+        value = dict.__getitem__(self, key)
+        return self.convert_with_key(key, value)
+
+    def get(self, key, default=None):
+        value = dict.get(self, key, default)
+        return self.convert_with_key(key, value)
+
+    def pop(self, key, default=None):
+        value = dict.pop(self, key, default)
+        return self.convert_with_key(key, value, replace=False)
+
+class ConvertingList(list, ConvertingMixin):
+    """A converting list wrapper."""
+    def __getitem__(self, key):
+        value = list.__getitem__(self, key)
+        return self.convert_with_key(key, value)
+
+    def pop(self, idx=-1):
+        value = list.pop(self, idx)
+        return self.convert(value)
+
+class ConvertingTuple(tuple, ConvertingMixin):
+    """A converting tuple wrapper."""
+    def __getitem__(self, key):
+        value = tuple.__getitem__(self, key)
+        # Can't replace a tuple entry.
+        return self.convert_with_key(key, value, replace=False)
+
+class BaseConfigurator(object):
+    """
+    The configurator base class which defines some useful defaults.
+    """
+
+    CONVERT_PATTERN = re.compile(r'^(?P<prefix>[a-z]+)://(?P<suffix>.*)$')
+
+    WORD_PATTERN = re.compile(r'^\s*(\w+)\s*')
+    DOT_PATTERN = re.compile(r'^\.\s*(\w+)\s*')
+    INDEX_PATTERN = re.compile(r'^\[\s*(\w+)\s*\]\s*')
+    DIGIT_PATTERN = re.compile(r'^\d+$')
+
+    value_converters = {
+        'ext' : 'ext_convert',
+        'cfg' : 'cfg_convert',
+    }
+
+    # We might want to use a different one, e.g. importlib
+    importer = staticmethod(__import__)
+
+    def __init__(self, config):
+        self.config = ConvertingDict(config)
+        self.config.configurator = self
+
+    def resolve(self, s):
+        """
+        Resolve strings to objects using standard import and attribute
+        syntax.
+        """
+        name = s.split('.')
+        used = name.pop(0)
+        try:
+            found = self.importer(used)
+            for frag in name:
+                used += '.' + frag
+                try:
+                    found = getattr(found, frag)
+                except AttributeError:
+                    self.importer(used)
+                    found = getattr(found, frag)
+            return found
+        except ImportError:
+            e, tb = sys.exc_info()[1:]
+            v = ValueError('Cannot resolve %r: %s' % (s, e))
+            v.__cause__, v.__traceback__ = e, tb
+            raise v
+
+    def ext_convert(self, value):
+        """Default converter for the ext:// protocol."""
+        return self.resolve(value)
+
+    def cfg_convert(self, value):
+        """Default converter for the cfg:// protocol."""
+        rest = value
+        m = self.WORD_PATTERN.match(rest)
+        if m is None:
+            raise ValueError("Unable to convert %r" % value)
+        else:
+            rest = rest[m.end():]
+            d = self.config[m.groups()[0]]
+            #print d, rest
+            while rest:
+                m = self.DOT_PATTERN.match(rest)
+                if m:
+                    d = d[m.groups()[0]]
+                else:
+                    m = self.INDEX_PATTERN.match(rest)
+                    if m:
+                        idx = m.groups()[0]
+                        if not self.DIGIT_PATTERN.match(idx):
+                            d = d[idx]
+                        else:
+                            try:
+                                n = int(idx) # try as number first (most likely)
+                                d = d[n]
+                            except TypeError:
+                                d = d[idx]
+                if m:
+                    rest = rest[m.end():]
+                else:
+                    raise ValueError('Unable to convert '
+                                     '%r at %r' % (value, rest))
+        #rest should be empty
+        return d
+
+    def convert(self, value):
+        """
+        Convert values to an appropriate type. dicts, lists and tuples are
+        replaced by their converting alternatives. Strings are checked to
+        see if they have a conversion format and are converted if they do.
+        """
+        if not isinstance(value, ConvertingDict) and isinstance(value, dict):
+            value = ConvertingDict(value)
+            value.configurator = self
+        elif not isinstance(value, ConvertingList) and isinstance(value, list):
+            value = ConvertingList(value)
+            value.configurator = self
+        elif not isinstance(value, ConvertingTuple) and\
+                 isinstance(value, tuple) and not hasattr(value, '_fields'):
+            value = ConvertingTuple(value)
+            value.configurator = self
+        elif isinstance(value, str): # str for py3k
+            m = self.CONVERT_PATTERN.match(value)
+            if m:
+                d = m.groupdict()
+                prefix = d['prefix']
+                converter = self.value_converters.get(prefix, None)
+                if converter:
+                    suffix = d['suffix']
+                    converter = getattr(self, converter)
+                    value = converter(suffix)
+        return value
+
+    def configure_custom(self, config):
+        """Configure an object with a user-supplied factory."""
+        c = config.pop('()')
+        if not callable(c):
+            c = self.resolve(c)
+        props = config.pop('.', None)
+        # Check for valid identifiers
+        kwargs = {k: config[k] for k in config if valid_ident(k)}
+        result = c(**kwargs)
+        if props:
+            for name, value in props.items():
+                setattr(result, name, value)
+        return result
+
+    def as_tuple(self, value):
+        """Utility function which converts lists to tuples."""
+        if isinstance(value, list):
+            value = tuple(value)
+        return value
+
+class DictConfigurator(BaseConfigurator):
+    """
+    Configure logging using a dictionary-like object to describe the
+    configuration.
+    """
+
+    def configure(self):
+        """Do the configuration."""
+
+        config = self.config
+        if 'version' not in config:
+            raise ValueError("dictionary doesn't specify a version")
+        if config['version'] != 1:
+            raise ValueError("Unsupported version: %s" % config['version'])
+        incremental = config.pop('incremental', False)
+        EMPTY_DICT = {}
+        logging._acquireLock()
+        try:
+            if incremental:
+                handlers = config.get('handlers', EMPTY_DICT)
+                for name in handlers:
+                    if name not in logging._handlers:
+                        raise ValueError('No handler found with '
+                                         'name %r'  % name)
+                    else:
+                        try:
+                            handler = logging._handlers[name]
+                            handler_config = handlers[name]
+                            level = handler_config.get('level', None)
+                            if level:
+                                handler.setLevel(logging._checkLevel(level))
+                        except Exception as e:
+                            raise ValueError('Unable to configure handler '
+                                             '%r' % name) from e
+                loggers = config.get('loggers', EMPTY_DICT)
+                for name in loggers:
+                    try:
+                        self.configure_logger(name, loggers[name], True)
+                    except Exception as e:
+                        raise ValueError('Unable to configure logger '
+                                         '%r' % name) from e
+                root = config.get('root', None)
+                if root:
+                    try:
+                        self.configure_root(root, True)
+                    except Exception as e:
+                        raise ValueError('Unable to configure root '
+                                         'logger') from e
+            else:
+                disable_existing = config.pop('disable_existing_loggers', True)
+
+                _clearExistingHandlers()
+
+                # Do formatters first - they don't refer to anything else
+                formatters = config.get('formatters', EMPTY_DICT)
+                for name in formatters:
+                    try:
+                        formatters[name] = self.configure_formatter(
+                                                            formatters[name])
+                    except Exception as e:
+                        raise ValueError('Unable to configure '
+                                         'formatter %r' % name) from e
+                # Next, do filters - they don't refer to anything else, either
+                filters = config.get('filters', EMPTY_DICT)
+                for name in filters:
+                    try:
+                        filters[name] = self.configure_filter(filters[name])
+                    except Exception as e:
+                        raise ValueError('Unable to configure '
+                                         'filter %r' % name) from e
+
+                # Next, do handlers - they refer to formatters and filters
+                # As handlers can refer to other handlers, sort the keys
+                # to allow a deterministic order of configuration
+                handlers = config.get('handlers', EMPTY_DICT)
+                deferred = []
+                for name in sorted(handlers):
+                    try:
+                        handler = self.configure_handler(handlers[name])
+                        handler.name = name
+                        handlers[name] = handler
+                    except Exception as e:
+                        if 'target not configured yet' in str(e.__cause__):
+                            deferred.append(name)
+                        else:
+                            raise ValueError('Unable to configure handler '
+                                             '%r' % name) from e
+
+                # Now do any that were deferred
+                for name in deferred:
+                    try:
+                        handler = self.configure_handler(handlers[name])
+                        handler.name = name
+                        handlers[name] = handler
+                    except Exception as e:
+                        raise ValueError('Unable to configure handler '
+                                         '%r' % name) from e
+
+                # Next, do loggers - they refer to handlers and filters
+
+                #we don't want to lose the existing loggers,
+                #since other threads may have pointers to them.
+                #existing is set to contain all existing loggers,
+                #and as we go through the new configuration we
+                #remove any which are configured. At the end,
+                #what's left in existing is the set of loggers
+                #which were in the previous configuration but
+                #which are not in the new configuration.
+                root = logging.root
+                existing = list(root.manager.loggerDict.keys())
+                #The list needs to be sorted so that we can
+                #avoid disabling child loggers of explicitly
+                #named loggers. With a sorted list it is easier
+                #to find the child loggers.
+                existing.sort()
+                #We'll keep the list of existing loggers
+                #which are children of named loggers here...
+                child_loggers = []
+                #now set up the new ones...
+                loggers = config.get('loggers', EMPTY_DICT)
+                for name in loggers:
+                    if name in existing:
+                        i = existing.index(name) + 1 # look after name
+                        prefixed = name + "."
+                        pflen = len(prefixed)
+                        num_existing = len(existing)
+                        while i < num_existing:
+                            if existing[i][:pflen] == prefixed:
+                                child_loggers.append(existing[i])
+                            i += 1
+                        existing.remove(name)
+                    try:
+                        self.configure_logger(name, loggers[name])
+                    except Exception as e:
+                        raise ValueError('Unable to configure logger '
+                                         '%r' % name) from e
+
+                #Disable any old loggers. There's no point deleting
+                #them as other threads may continue to hold references
+                #and by disabling them, you stop them doing any logging.
+                #However, don't disable children of named loggers, as that's
+                #probably not what was intended by the user.
+                #for log in existing:
+                #    logger = root.manager.loggerDict[log]
+                #    if log in child_loggers:
+                #        logger.level = logging.NOTSET
+                #        logger.handlers = []
+                #        logger.propagate = True
+                #    elif disable_existing:
+                #        logger.disabled = True
+                _handle_existing_loggers(existing, child_loggers,
+                                         disable_existing)
+
+                # And finally, do the root logger
+                root = config.get('root', None)
+                if root:
+                    try:
+                        self.configure_root(root)
+                    except Exception as e:
+                        raise ValueError('Unable to configure root '
+                                         'logger') from e
+        finally:
+            logging._releaseLock()
+
+    def configure_formatter(self, config):
+        """Configure a formatter from a dictionary."""
+        if '()' in config:
+            factory = config['()'] # for use in exception handler
+            try:
+                result = self.configure_custom(config)
+            except TypeError as te:
+                if "'format'" not in str(te):
+                    raise
+                #Name of parameter changed from fmt to format.
+                #Retry with old name.
+                #This is so that code can be used with older Python versions
+                #(e.g. by Django)
+                config['fmt'] = config.pop('format')
+                config['()'] = factory
+                result = self.configure_custom(config)
+        else:
+            fmt = config.get('format', None)
+            dfmt = config.get('datefmt', None)
+            style = config.get('style', '%')
+            cname = config.get('class', None)
+
+            if not cname:
+                c = logging.Formatter
+            else:
+                c = _resolve(cname)
+
+            # A TypeError would be raised if "validate" key is passed in with a formatter callable
+            # that does not accept "validate" as a parameter
+            if 'validate' in config:  # if user hasn't mentioned it, the default will be fine
+                result = c(fmt, dfmt, style, config['validate'])
+            else:
+                result = c(fmt, dfmt, style)
+
+        return result
+
+    def configure_filter(self, config):
+        """Configure a filter from a dictionary."""
+        if '()' in config:
+            result = self.configure_custom(config)
+        else:
+            name = config.get('name', '')
+            result = logging.Filter(name)
+        return result
+
+    def add_filters(self, filterer, filters):
+        """Add filters to a filterer from a list of names."""
+        for f in filters:
+            try:
+                filterer.addFilter(self.config['filters'][f])
+            except Exception as e:
+                raise ValueError('Unable to add filter %r' % f) from e
+
+    def configure_handler(self, config):
+        """Configure a handler from a dictionary."""
+        config_copy = dict(config)  # for restoring in case of error
+        formatter = config.pop('formatter', None)
+        if formatter:
+            try:
+                formatter = self.config['formatters'][formatter]
+            except Exception as e:
+                raise ValueError('Unable to set formatter '
+                                 '%r' % formatter) from e
+        level = config.pop('level', None)
+        filters = config.pop('filters', None)
+        if '()' in config:
+            c = config.pop('()')
+            if not callable(c):
+                c = self.resolve(c)
+            factory = c
+        else:
+            cname = config.pop('class')
+            klass = self.resolve(cname)
+            #Special case for handler which refers to another handler
+            if issubclass(klass, logging.handlers.MemoryHandler) and\
+                'target' in config:
+                try:
+                    th = self.config['handlers'][config['target']]
+                    if not isinstance(th, logging.Handler):
+                        config.update(config_copy)  # restore for deferred cfg
+                        raise TypeError('target not configured yet')
+                    config['target'] = th
+                except Exception as e:
+                    raise ValueError('Unable to set target handler '
+                                     '%r' % config['target']) from e
+            elif issubclass(klass, logging.handlers.SMTPHandler) and\
+                'mailhost' in config:
+                config['mailhost'] = self.as_tuple(config['mailhost'])
+            elif issubclass(klass, logging.handlers.SysLogHandler) and\
+                'address' in config:
+                config['address'] = self.as_tuple(config['address'])
+            factory = klass
+        props = config.pop('.', None)
+        kwargs = {k: config[k] for k in config if valid_ident(k)}
+        try:
+            result = factory(**kwargs)
+        except TypeError as te:
+            if "'stream'" not in str(te):
+                raise
+            #The argument name changed from strm to stream
+            #Retry with old name.
+            #This is so that code can be used with older Python versions
+            #(e.g. by Django)
+            kwargs['strm'] = kwargs.pop('stream')
+            result = factory(**kwargs)
+        if formatter:
+            result.setFormatter(formatter)
+        if level is not None:
+            result.setLevel(logging._checkLevel(level))
+        if filters:
+            self.add_filters(result, filters)
+        if props:
+            for name, value in props.items():
+                setattr(result, name, value)
+        return result
+
+    def add_handlers(self, logger, handlers):
+        """Add handlers to a logger from a list of names."""
+        for h in handlers:
+            try:
+                logger.addHandler(self.config['handlers'][h])
+            except Exception as e:
+                raise ValueError('Unable to add handler %r' % h) from e
+
+    def common_logger_config(self, logger, config, incremental=False):
+        """
+        Perform configuration which is common to root and non-root loggers.
+        """
+        level = config.get('level', None)
+        if level is not None:
+            logger.setLevel(logging._checkLevel(level))
+        if not incremental:
+            #Remove any existing handlers
+            for h in logger.handlers[:]:
+                logger.removeHandler(h)
+            handlers = config.get('handlers', None)
+            if handlers:
+                self.add_handlers(logger, handlers)
+            filters = config.get('filters', None)
+            if filters:
+                self.add_filters(logger, filters)
+
+    def configure_logger(self, name, config, incremental=False):
+        """Configure a non-root logger from a dictionary."""
+        logger = logging.getLogger(name)
+        self.common_logger_config(logger, config, incremental)
+        logger.disabled = False
+        propagate = config.get('propagate', None)
+        if propagate is not None:
+            logger.propagate = propagate
+
+    def configure_root(self, config, incremental=False):
+        """Configure a root logger from a dictionary."""
+        root = logging.getLogger()
+        self.common_logger_config(root, config, incremental)
+
+dictConfigClass = DictConfigurator
+
+def dictConfig(config):
+    """Configure logging using a dictionary."""
+    dictConfigClass(config).configure()
+
+
+def listen(port=DEFAULT_LOGGING_CONFIG_PORT, verify=None):
+    """
+    Start up a socket server on the specified port, and listen for new
+    configurations.
+
+    These will be sent as a file suitable for processing by fileConfig().
+    Returns a Thread object on which you can call start() to start the server,
+    and which you can join() when appropriate. To stop the server, call
+    stopListening().
+
+    Use the ``verify`` argument to verify any bytes received across the wire
+    from a client. If specified, it should be a callable which receives a
+    single argument - the bytes of configuration data received across the
+    network - and it should return either ``None``, to indicate that the
+    passed in bytes could not be verified and should be discarded, or a
+    byte string which is then passed to the configuration machinery as
+    normal. Note that you can return transformed bytes, e.g. by decrypting
+    the bytes passed in.
+    """
+
+    class ConfigStreamHandler(StreamRequestHandler):
+        """
+        Handler for a logging configuration request.
+
+        It expects a completely new logging configuration and uses fileConfig
+        to install it.
+        """
+        def handle(self):
+            """
+            Handle a request.
+
+            Each request is expected to be a 4-byte length, packed using
+            struct.pack(">L", n), followed by the config file.
+            Uses fileConfig() to do the grunt work.
+            """
+            try:
+                conn = self.connection
+                chunk = conn.recv(4)
+                if len(chunk) == 4:
+                    slen = struct.unpack(">L", chunk)[0]
+                    chunk = self.connection.recv(slen)
+                    while len(chunk) < slen:
+                        chunk = chunk + conn.recv(slen - len(chunk))
+                    if self.server.verify is not None:
+                        chunk = self.server.verify(chunk)
+                    if chunk is not None:   # verified, can process
+                        chunk = chunk.decode("utf-8")
+                        try:
+                            import json
+                            d =json.loads(chunk)
+                            assert isinstance(d, dict)
+                            dictConfig(d)
+                        except Exception:
+                            #Apply new configuration.
+
+                            file = io.StringIO(chunk)
+                            try:
+                                fileConfig(file)
+                            except Exception:
+                                traceback.print_exc()
+                    if self.server.ready:
+                        self.server.ready.set()
+            except OSError as e:
+                if e.errno != RESET_ERROR:
+                    raise
+
+    class ConfigSocketReceiver(ThreadingTCPServer):
+        """
+        A simple TCP socket-based logging config receiver.
+        """
+
+        allow_reuse_address = 1
+
+        def __init__(self, host='localhost', port=DEFAULT_LOGGING_CONFIG_PORT,
+                     handler=None, ready=None, verify=None):
+            ThreadingTCPServer.__init__(self, (host, port), handler)
+            logging._acquireLock()
+            self.abort = 0
+            logging._releaseLock()
+            self.timeout = 1
+            self.ready = ready
+            self.verify = verify
+
+        def serve_until_stopped(self):
+            import select
+            abort = 0
+            while not abort:
+                rd, wr, ex = select.select([self.socket.fileno()],
+                                           [], [],
+                                           self.timeout)
+                if rd:
+                    self.handle_request()
+                logging._acquireLock()
+                abort = self.abort
+                logging._releaseLock()
+            self.server_close()
+
+    class Server(threading.Thread):
+
+        def __init__(self, rcvr, hdlr, port, verify):
+            super(Server, self).__init__()
+            self.rcvr = rcvr
+            self.hdlr = hdlr
+            self.port = port
+            self.verify = verify
+            self.ready = threading.Event()
+
+        def run(self):
+            server = self.rcvr(port=self.port, handler=self.hdlr,
+                               ready=self.ready,
+                               verify=self.verify)
+            if self.port == 0:
+                self.port = server.server_address[1]
+            self.ready.set()
+            global _listener
+            logging._acquireLock()
+            _listener = server
+            logging._releaseLock()
+            server.serve_until_stopped()
+
+    return Server(ConfigSocketReceiver, ConfigStreamHandler, port, verify)
+
+def stopListening():
+    """
+    Stop the listening server which was created with a call to listen().
+    """
+    global _listener
+    logging._acquireLock()
+    try:
+        if _listener:
+            _listener.abort = 1
+            _listener = None
+    finally:
+        logging._releaseLock()

parrot/lib/python3.10/logging/handlers.py

@@ -0,0 +1,1587 @@
+# Copyright 2001-2021 by Vinay Sajip. All Rights Reserved.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose and without fee is hereby granted,
+# provided that the above copyright notice appear in all copies and that
+# both that copyright notice and this permission notice appear in
+# supporting documentation, and that the name of Vinay Sajip
+# not be used in advertising or publicity pertaining to distribution
+# of the software without specific, written prior permission.
+# VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+# VINAY SAJIP BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+# IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""
+Additional handlers for the logging package for Python. The core package is
+based on PEP 282 and comments thereto in comp.lang.python.
+
+Copyright (C) 2001-2021 Vinay Sajip. All Rights Reserved.
+
+To use, simply 'import logging.handlers' and log away!
+"""
+
+import io, logging, socket, os, pickle, struct, time, re
+from stat import ST_DEV, ST_INO, ST_MTIME
+import queue
+import threading
+import copy
+
+#
+# Some constants...
+#
+
+DEFAULT_TCP_LOGGING_PORT    = 9020
+DEFAULT_UDP_LOGGING_PORT    = 9021
+DEFAULT_HTTP_LOGGING_PORT   = 9022
+DEFAULT_SOAP_LOGGING_PORT   = 9023
+SYSLOG_UDP_PORT             = 514
+SYSLOG_TCP_PORT             = 514
+
+_MIDNIGHT = 24 * 60 * 60  # number of seconds in a day
+
+class BaseRotatingHandler(logging.FileHandler):
+    """
+    Base class for handlers that rotate log files at a certain point.
+    Not meant to be instantiated directly.  Instead, use RotatingFileHandler
+    or TimedRotatingFileHandler.
+    """
+    namer = None
+    rotator = None
+
+    def __init__(self, filename, mode, encoding=None, delay=False, errors=None):
+        """
+        Use the specified filename for streamed logging
+        """
+        logging.FileHandler.__init__(self, filename, mode=mode,
+                                     encoding=encoding, delay=delay,
+                                     errors=errors)
+        self.mode = mode
+        self.encoding = encoding
+        self.errors = errors
+
+    def emit(self, record):
+        """
+        Emit a record.
+
+        Output the record to the file, catering for rollover as described
+        in doRollover().
+        """
+        try:
+            if self.shouldRollover(record):
+                self.doRollover()
+            logging.FileHandler.emit(self, record)
+        except Exception:
+            self.handleError(record)
+
+    def rotation_filename(self, default_name):
+        """
+        Modify the filename of a log file when rotating.
+
+        This is provided so that a custom filename can be provided.
+
+        The default implementation calls the 'namer' attribute of the
+        handler, if it's callable, passing the default name to
+        it. If the attribute isn't callable (the default is None), the name
+        is returned unchanged.
+
+        :param default_name: The default name for the log file.
+        """
+        if not callable(self.namer):
+            result = default_name
+        else:
+            result = self.namer(default_name)
+        return result
+
+    def rotate(self, source, dest):
+        """
+        When rotating, rotate the current log.
+
+        The default implementation calls the 'rotator' attribute of the
+        handler, if it's callable, passing the source and dest arguments to
+        it. If the attribute isn't callable (the default is None), the source
+        is simply renamed to the destination.
+
+        :param source: The source filename. This is normally the base
+                       filename, e.g. 'test.log'
+        :param dest:   The destination filename. This is normally
+                       what the source is rotated to, e.g. 'test.log.1'.
+        """
+        if not callable(self.rotator):
+            # Issue 18940: A file may not have been created if delay is True.
+            if os.path.exists(source):
+                os.rename(source, dest)
+        else:
+            self.rotator(source, dest)
+
+class RotatingFileHandler(BaseRotatingHandler):
+    """
+    Handler for logging to a set of files, which switches from one file
+    to the next when the current file reaches a certain size.
+    """
+    def __init__(self, filename, mode='a', maxBytes=0, backupCount=0,
+                 encoding=None, delay=False, errors=None):
+        """
+        Open the specified file and use it as the stream for logging.
+
+        By default, the file grows indefinitely. You can specify particular
+        values of maxBytes and backupCount to allow the file to rollover at
+        a predetermined size.
+
+        Rollover occurs whenever the current log file is nearly maxBytes in
+        length. If backupCount is >= 1, the system will successively create
+        new files with the same pathname as the base file, but with extensions
+        ".1", ".2" etc. appended to it. For example, with a backupCount of 5
+        and a base file name of "app.log", you would get "app.log",
+        "app.log.1", "app.log.2", ... through to "app.log.5". The file being
+        written to is always "app.log" - when it gets filled up, it is closed
+        and renamed to "app.log.1", and if files "app.log.1", "app.log.2" etc.
+        exist, then they are renamed to "app.log.2", "app.log.3" etc.
+        respectively.
+
+        If maxBytes is zero, rollover never occurs.
+        """
+        # If rotation/rollover is wanted, it doesn't make sense to use another
+        # mode. If for example 'w' were specified, then if there were multiple
+        # runs of the calling application, the logs from previous runs would be
+        # lost if the 'w' is respected, because the log file would be truncated
+        # on each run.
+        if maxBytes > 0:
+            mode = 'a'
+        if "b" not in mode:
+            encoding = io.text_encoding(encoding)
+        BaseRotatingHandler.__init__(self, filename, mode, encoding=encoding,
+                                     delay=delay, errors=errors)
+        self.maxBytes = maxBytes
+        self.backupCount = backupCount
+
+    def doRollover(self):
+        """
+        Do a rollover, as described in __init__().
+        """
+        if self.stream:
+            self.stream.close()
+            self.stream = None
+        if self.backupCount > 0:
+            for i in range(self.backupCount - 1, 0, -1):
+                sfn = self.rotation_filename("%s.%d" % (self.baseFilename, i))
+                dfn = self.rotation_filename("%s.%d" % (self.baseFilename,
+                                                        i + 1))
+                if os.path.exists(sfn):
+                    if os.path.exists(dfn):
+                        os.remove(dfn)
+                    os.rename(sfn, dfn)
+            dfn = self.rotation_filename(self.baseFilename + ".1")
+            if os.path.exists(dfn):
+                os.remove(dfn)
+            self.rotate(self.baseFilename, dfn)
+        if not self.delay:
+            self.stream = self._open()
+
+    def shouldRollover(self, record):
+        """
+        Determine if rollover should occur.
+
+        Basically, see if the supplied record would cause the file to exceed
+        the size limit we have.
+        """
+        # See bpo-45401: Never rollover anything other than regular files
+        if os.path.exists(self.baseFilename) and not os.path.isfile(self.baseFilename):
+            return False
+        if self.stream is None:                 # delay was set...
+            self.stream = self._open()
+        if self.maxBytes > 0:                   # are we rolling over?
+            msg = "%s\n" % self.format(record)
+            self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
+            if self.stream.tell() + len(msg) >= self.maxBytes:
+                return True
+        return False
+
+class TimedRotatingFileHandler(BaseRotatingHandler):
+    """
+    Handler for logging to a file, rotating the log file at certain timed
+    intervals.
+
+    If backupCount is > 0, when rollover is done, no more than backupCount
+    files are kept - the oldest ones are deleted.
+    """
+    def __init__(self, filename, when='h', interval=1, backupCount=0,
+                 encoding=None, delay=False, utc=False, atTime=None,
+                 errors=None):
+        encoding = io.text_encoding(encoding)
+        BaseRotatingHandler.__init__(self, filename, 'a', encoding=encoding,
+                                     delay=delay, errors=errors)
+        self.when = when.upper()
+        self.backupCount = backupCount
+        self.utc = utc
+        self.atTime = atTime
+        # Calculate the real rollover interval, which is just the number of
+        # seconds between rollovers.  Also set the filename suffix used when
+        # a rollover occurs.  Current 'when' events supported:
+        # S - Seconds
+        # M - Minutes
+        # H - Hours
+        # D - Days
+        # midnight - roll over at midnight
+        # W{0-6} - roll over on a certain day; 0 - Monday
+        #
+        # Case of the 'when' specifier is not important; lower or upper case
+        # will work.
+        if self.when == 'S':
+            self.interval = 1 # one second
+            self.suffix = "%Y-%m-%d_%H-%M-%S"
+            self.extMatch = r"^\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2}(\.\w+)?$"
+        elif self.when == 'M':
+            self.interval = 60 # one minute
+            self.suffix = "%Y-%m-%d_%H-%M"
+            self.extMatch = r"^\d{4}-\d{2}-\d{2}_\d{2}-\d{2}(\.\w+)?$"
+        elif self.when == 'H':
+            self.interval = 60 * 60 # one hour
+            self.suffix = "%Y-%m-%d_%H"
+            self.extMatch = r"^\d{4}-\d{2}-\d{2}_\d{2}(\.\w+)?$"
+        elif self.when == 'D' or self.when == 'MIDNIGHT':
+            self.interval = 60 * 60 * 24 # one day
+            self.suffix = "%Y-%m-%d"
+            self.extMatch = r"^\d{4}-\d{2}-\d{2}(\.\w+)?$"
+        elif self.when.startswith('W'):
+            self.interval = 60 * 60 * 24 * 7 # one week
+            if len(self.when) != 2:
+                raise ValueError("You must specify a day for weekly rollover from 0 to 6 (0 is Monday): %s" % self.when)
+            if self.when[1] < '0' or self.when[1] > '6':
+                raise ValueError("Invalid day specified for weekly rollover: %s" % self.when)
+            self.dayOfWeek = int(self.when[1])
+            self.suffix = "%Y-%m-%d"
+            self.extMatch = r"^\d{4}-\d{2}-\d{2}(\.\w+)?$"
+        else:
+            raise ValueError("Invalid rollover interval specified: %s" % self.when)
+
+        self.extMatch = re.compile(self.extMatch, re.ASCII)
+        self.interval = self.interval * interval # multiply by units requested
+        # The following line added because the filename passed in could be a
+        # path object (see Issue #27493), but self.baseFilename will be a string
+        filename = self.baseFilename
+        if os.path.exists(filename):
+            t = os.stat(filename)[ST_MTIME]
+        else:
+            t = int(time.time())
+        self.rolloverAt = self.computeRollover(t)
+
+    def computeRollover(self, currentTime):
+        """
+        Work out the rollover time based on the specified time.
+        """
+        result = currentTime + self.interval
+        # If we are rolling over at midnight or weekly, then the interval is already known.
+        # What we need to figure out is WHEN the next interval is.  In other words,
+        # if you are rolling over at midnight, then your base interval is 1 day,
+        # but you want to start that one day clock at midnight, not now.  So, we
+        # have to fudge the rolloverAt value in order to trigger the first rollover
+        # at the right time.  After that, the regular interval will take care of
+        # the rest.  Note that this code doesn't care about leap seconds. :)
+        if self.when == 'MIDNIGHT' or self.when.startswith('W'):
+            # This could be done with less code, but I wanted it to be clear
+            if self.utc:
+                t = time.gmtime(currentTime)
+            else:
+                t = time.localtime(currentTime)
+            currentHour = t[3]
+            currentMinute = t[4]
+            currentSecond = t[5]
+            currentDay = t[6]
+            # r is the number of seconds left between now and the next rotation
+            if self.atTime is None:
+                rotate_ts = _MIDNIGHT
+            else:
+                rotate_ts = ((self.atTime.hour * 60 + self.atTime.minute)*60 +
+                    self.atTime.second)
+
+            r = rotate_ts - ((currentHour * 60 + currentMinute) * 60 +
+                currentSecond)
+            if r < 0:
+                # Rotate time is before the current time (for example when
+                # self.rotateAt is 13:45 and it now 14:15), rotation is
+                # tomorrow.
+                r += _MIDNIGHT
+                currentDay = (currentDay + 1) % 7
+            result = currentTime + r
+            # If we are rolling over on a certain day, add in the number of days until
+            # the next rollover, but offset by 1 since we just calculated the time
+            # until the next day starts.  There are three cases:
+            # Case 1) The day to rollover is today; in this case, do nothing
+            # Case 2) The day to rollover is further in the interval (i.e., today is
+            #         day 2 (Wednesday) and rollover is on day 6 (Sunday).  Days to
+            #         next rollover is simply 6 - 2 - 1, or 3.
+            # Case 3) The day to rollover is behind us in the interval (i.e., today
+            #         is day 5 (Saturday) and rollover is on day 3 (Thursday).
+            #         Days to rollover is 6 - 5 + 3, or 4.  In this case, it's the
+            #         number of days left in the current week (1) plus the number
+            #         of days in the next week until the rollover day (3).
+            # The calculations described in 2) and 3) above need to have a day added.
+            # This is because the above time calculation takes us to midnight on this
+            # day, i.e. the start of the next day.
+            if self.when.startswith('W'):
+                day = currentDay # 0 is Monday
+                if day != self.dayOfWeek:
+                    if day < self.dayOfWeek:
+                        daysToWait = self.dayOfWeek - day
+                    else:
+                        daysToWait = 6 - day + self.dayOfWeek + 1
+                    newRolloverAt = result + (daysToWait * (60 * 60 * 24))
+                    if not self.utc:
+                        dstNow = t[-1]
+                        dstAtRollover = time.localtime(newRolloverAt)[-1]
+                        if dstNow != dstAtRollover:
+                            if not dstNow:  # DST kicks in before next rollover, so we need to deduct an hour
+                                addend = -3600
+                            else:           # DST bows out before next rollover, so we need to add an hour
+                                addend = 3600
+                            newRolloverAt += addend
+                    result = newRolloverAt
+        return result
+
+    def shouldRollover(self, record):
+        """
+        Determine if rollover should occur.
+
+        record is not used, as we are just comparing times, but it is needed so
+        the method signatures are the same
+        """
+        t = int(time.time())
+        if t >= self.rolloverAt:
+            # See #89564: Never rollover anything other than regular files
+            if os.path.exists(self.baseFilename) and not os.path.isfile(self.baseFilename):
+                # The file is not a regular file, so do not rollover, but do
+                # set the next rollover time to avoid repeated checks.
+                self.rolloverAt = self.computeRollover(t)
+                return False
+
+            return True
+        return False
+
+    def getFilesToDelete(self):
+        """
+        Determine the files to delete when rolling over.
+
+        More specific than the earlier method, which just used glob.glob().
+        """
+        dirName, baseName = os.path.split(self.baseFilename)
+        fileNames = os.listdir(dirName)
+        result = []
+        # See bpo-44753: Don't use the extension when computing the prefix.
+        n, e = os.path.splitext(baseName)
+        prefix = n + '.'
+        plen = len(prefix)
+        for fileName in fileNames:
+            if self.namer is None:
+                # Our files will always start with baseName
+                if not fileName.startswith(baseName):
+                    continue
+            else:
+                # Our files could be just about anything after custom naming, but
+                # likely candidates are of the form
+                # foo.log.DATETIME_SUFFIX or foo.DATETIME_SUFFIX.log
+                if (not fileName.startswith(baseName) and fileName.endswith(e) and
+                    len(fileName) > (plen + 1) and not fileName[plen+1].isdigit()):
+                    continue
+
+            if fileName[:plen] == prefix:
+                suffix = fileName[plen:]
+                # See bpo-45628: The date/time suffix could be anywhere in the
+                # filename
+                parts = suffix.split('.')
+                for part in parts:
+                    if self.extMatch.match(part):
+                        result.append(os.path.join(dirName, fileName))
+                        break
+        if len(result) < self.backupCount:
+            result = []
+        else:
+            result.sort()
+            result = result[:len(result) - self.backupCount]
+        return result
+
+    def doRollover(self):
+        """
+        do a rollover; in this case, a date/time stamp is appended to the filename
+        when the rollover happens.  However, you want the file to be named for the
+        start of the interval, not the current time.  If there is a backup count,
+        then we have to get a list of matching filenames, sort them and remove
+        the one with the oldest suffix.
+        """
+        if self.stream:
+            self.stream.close()
+            self.stream = None
+        # get the time that this sequence started at and make it a TimeTuple
+        currentTime = int(time.time())
+        dstNow = time.localtime(currentTime)[-1]
+        t = self.rolloverAt - self.interval
+        if self.utc:
+            timeTuple = time.gmtime(t)
+        else:
+            timeTuple = time.localtime(t)
+            dstThen = timeTuple[-1]
+            if dstNow != dstThen:
+                if dstNow:
+                    addend = 3600
+                else:
+                    addend = -3600
+                timeTuple = time.localtime(t + addend)
+        dfn = self.rotation_filename(self.baseFilename + "." +
+                                     time.strftime(self.suffix, timeTuple))
+        if os.path.exists(dfn):
+            os.remove(dfn)
+        self.rotate(self.baseFilename, dfn)
+        if self.backupCount > 0:
+            for s in self.getFilesToDelete():
+                os.remove(s)
+        if not self.delay:
+            self.stream = self._open()
+        newRolloverAt = self.computeRollover(currentTime)
+        while newRolloverAt <= currentTime:
+            newRolloverAt = newRolloverAt + self.interval
+        #If DST changes and midnight or weekly rollover, adjust for this.
+        if (self.when == 'MIDNIGHT' or self.when.startswith('W')) and not self.utc:
+            dstAtRollover = time.localtime(newRolloverAt)[-1]
+            if dstNow != dstAtRollover:
+                if not dstNow:  # DST kicks in before next rollover, so we need to deduct an hour
+                    addend = -3600
+                else:           # DST bows out before next rollover, so we need to add an hour
+                    addend = 3600
+                newRolloverAt += addend
+        self.rolloverAt = newRolloverAt
+
+class WatchedFileHandler(logging.FileHandler):
+    """
+    A handler for logging to a file, which watches the file
+    to see if it has changed while in use. This can happen because of
+    usage of programs such as newsyslog and logrotate which perform
+    log file rotation. This handler, intended for use under Unix,
+    watches the file to see if it has changed since the last emit.
+    (A file has changed if its device or inode have changed.)
+    If it has changed, the old file stream is closed, and the file
+    opened to get a new stream.
+
+    This handler is not appropriate for use under Windows, because
+    under Windows open files cannot be moved or renamed - logging
+    opens the files with exclusive locks - and so there is no need
+    for such a handler. Furthermore, ST_INO is not supported under
+    Windows; stat always returns zero for this value.
+
+    This handler is based on a suggestion and patch by Chad J.
+    Schroeder.
+    """
+    def __init__(self, filename, mode='a', encoding=None, delay=False,
+                 errors=None):
+        if "b" not in mode:
+            encoding = io.text_encoding(encoding)
+        logging.FileHandler.__init__(self, filename, mode=mode,
+                                     encoding=encoding, delay=delay,
+                                     errors=errors)
+        self.dev, self.ino = -1, -1
+        self._statstream()
+
+    def _statstream(self):
+        if self.stream:
+            sres = os.fstat(self.stream.fileno())
+            self.dev, self.ino = sres[ST_DEV], sres[ST_INO]
+
+    def reopenIfNeeded(self):
+        """
+        Reopen log file if needed.
+
+        Checks if the underlying file has changed, and if it
+        has, close the old stream and reopen the file to get the
+        current stream.
+        """
+        # Reduce the chance of race conditions by stat'ing by path only
+        # once and then fstat'ing our new fd if we opened a new log stream.
+        # See issue #14632: Thanks to John Mulligan for the problem report
+        # and patch.
+        try:
+            # stat the file by path, checking for existence
+            sres = os.stat(self.baseFilename)
+        except FileNotFoundError:
+            sres = None
+        # compare file system stat with that of our stream file handle
+        if not sres or sres[ST_DEV] != self.dev or sres[ST_INO] != self.ino:
+            if self.stream is not None:
+                # we have an open file handle, clean it up
+                self.stream.flush()
+                self.stream.close()
+                self.stream = None  # See Issue #21742: _open () might fail.
+                # open a new file handle and get new stat info from that fd
+                self.stream = self._open()
+                self._statstream()
+
+    def emit(self, record):
+        """
+        Emit a record.
+
+        If underlying file has changed, reopen the file before emitting the
+        record to it.
+        """
+        self.reopenIfNeeded()
+        logging.FileHandler.emit(self, record)
+
+
+class SocketHandler(logging.Handler):
+    """
+    A handler class which writes logging records, in pickle format, to
+    a streaming socket. The socket is kept open across logging calls.
+    If the peer resets it, an attempt is made to reconnect on the next call.
+    The pickle which is sent is that of the LogRecord's attribute dictionary
+    (__dict__), so that the receiver does not need to have the logging module
+    installed in order to process the logging event.
+
+    To unpickle the record at the receiving end into a LogRecord, use the
+    makeLogRecord function.
+    """
+
+    def __init__(self, host, port):
+        """
+        Initializes the handler with a specific host address and port.
+
+        When the attribute *closeOnError* is set to True - if a socket error
+        occurs, the socket is silently closed and then reopened on the next
+        logging call.
+        """
+        logging.Handler.__init__(self)
+        self.host = host
+        self.port = port
+        if port is None:
+            self.address = host
+        else:
+            self.address = (host, port)
+        self.sock = None
+        self.closeOnError = False
+        self.retryTime = None
+        #
+        # Exponential backoff parameters.
+        #
+        self.retryStart = 1.0
+        self.retryMax = 30.0
+        self.retryFactor = 2.0
+
+    def makeSocket(self, timeout=1):
+        """
+        A factory method which allows subclasses to define the precise
+        type of socket they want.
+        """
+        if self.port is not None:
+            result = socket.create_connection(self.address, timeout=timeout)
+        else:
+            result = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+            result.settimeout(timeout)
+            try:
+                result.connect(self.address)
+            except OSError:
+                result.close()  # Issue 19182
+                raise
+        return result
+
+    def createSocket(self):
+        """
+        Try to create a socket, using an exponential backoff with
+        a max retry time. Thanks to Robert Olson for the original patch
+        (SF #815911) which has been slightly refactored.
+        """
+        now = time.time()
+        # Either retryTime is None, in which case this
+        # is the first time back after a disconnect, or
+        # we've waited long enough.
+        if self.retryTime is None:
+            attempt = True
+        else:
+            attempt = (now >= self.retryTime)
+        if attempt:
+            try:
+                self.sock = self.makeSocket()
+                self.retryTime = None # next time, no delay before trying
+            except OSError:
+                #Creation failed, so set the retry time and return.
+                if self.retryTime is None:
+                    self.retryPeriod = self.retryStart
+                else:
+                    self.retryPeriod = self.retryPeriod * self.retryFactor
+                    if self.retryPeriod > self.retryMax:
+                        self.retryPeriod = self.retryMax
+                self.retryTime = now + self.retryPeriod
+
+    def send(self, s):
+        """
+        Send a pickled string to the socket.
+
+        This function allows for partial sends which can happen when the
+        network is busy.
+        """
+        if self.sock is None:
+            self.createSocket()
+        #self.sock can be None either because we haven't reached the retry
+        #time yet, or because we have reached the retry time and retried,
+        #but are still unable to connect.
+        if self.sock:
+            try:
+                self.sock.sendall(s)
+            except OSError: #pragma: no cover
+                self.sock.close()
+                self.sock = None  # so we can call createSocket next time
+
+    def makePickle(self, record):
+        """
+        Pickles the record in binary format with a length prefix, and
+        returns it ready for transmission across the socket.
+        """
+        ei = record.exc_info
+        if ei:
+            # just to get traceback text into record.exc_text ...
+            dummy = self.format(record)
+        # See issue #14436: If msg or args are objects, they may not be
+        # available on the receiving end. So we convert the msg % args
+        # to a string, save it as msg and zap the args.
+        d = dict(record.__dict__)
+        d['msg'] = record.getMessage()
+        d['args'] = None
+        d['exc_info'] = None
+        # Issue #25685: delete 'message' if present: redundant with 'msg'
+        d.pop('message', None)
+        s = pickle.dumps(d, 1)
+        slen = struct.pack(">L", len(s))
+        return slen + s
+
+    def handleError(self, record):
+        """
+        Handle an error during logging.
+
+        An error has occurred during logging. Most likely cause -
+        connection lost. Close the socket so that we can retry on the
+        next event.
+        """
+        if self.closeOnError and self.sock:
+            self.sock.close()
+            self.sock = None        #try to reconnect next time
+        else:
+            logging.Handler.handleError(self, record)
+
+    def emit(self, record):
+        """
+        Emit a record.
+
+        Pickles the record and writes it to the socket in binary format.
+        If there is an error with the socket, silently drop the packet.
+        If there was a problem with the socket, re-establishes the
+        socket.
+        """
+        try:
+            s = self.makePickle(record)
+            self.send(s)
+        except Exception:
+            self.handleError(record)
+
+    def close(self):
+        """
+        Closes the socket.
+        """
+        self.acquire()
+        try:
+            sock = self.sock
+            if sock:
+                self.sock = None
+                sock.close()
+            logging.Handler.close(self)
+        finally:
+            self.release()
+
+class DatagramHandler(SocketHandler):
+    """
+    A handler class which writes logging records, in pickle format, to
+    a datagram socket.  The pickle which is sent is that of the LogRecord's
+    attribute dictionary (__dict__), so that the receiver does not need to
+    have the logging module installed in order to process the logging event.
+
+    To unpickle the record at the receiving end into a LogRecord, use the
+    makeLogRecord function.
+
+    """
+    def __init__(self, host, port):
+        """
+        Initializes the handler with a specific host address and port.
+        """
+        SocketHandler.__init__(self, host, port)
+        self.closeOnError = False
+
+    def makeSocket(self):
+        """
+        The factory method of SocketHandler is here overridden to create
+        a UDP socket (SOCK_DGRAM).
+        """
+        if self.port is None:
+            family = socket.AF_UNIX
+        else:
+            family = socket.AF_INET
+        s = socket.socket(family, socket.SOCK_DGRAM)
+        return s
+
+    def send(self, s):
+        """
+        Send a pickled string to a socket.
+
+        This function no longer allows for partial sends which can happen
+        when the network is busy - UDP does not guarantee delivery and
+        can deliver packets out of sequence.
+        """
+        if self.sock is None:
+            self.createSocket()
+        self.sock.sendto(s, self.address)
+
+class SysLogHandler(logging.Handler):
+    """
+    A handler class which sends formatted logging records to a syslog
+    server. Based on Sam Rushing's syslog module:
+    http://www.nightmare.com/squirl/python-ext/misc/syslog.py
+    Contributed by Nicolas Untz (after which minor refactoring changes
+    have been made).
+    """
+
+    # from <linux/sys/syslog.h>:
+    # ======================================================================
+    # priorities/facilities are encoded into a single 32-bit quantity, where
+    # the bottom 3 bits are the priority (0-7) and the top 28 bits are the
+    # facility (0-big number). Both the priorities and the facilities map
+    # roughly one-to-one to strings in the syslogd(8) source code.  This
+    # mapping is included in this file.
+    #
+    # priorities (these are ordered)
+
+    LOG_EMERG     = 0       #  system is unusable
+    LOG_ALERT     = 1       #  action must be taken immediately
+    LOG_CRIT      = 2       #  critical conditions
+    LOG_ERR       = 3       #  error conditions
+    LOG_WARNING   = 4       #  warning conditions
+    LOG_NOTICE    = 5       #  normal but significant condition
+    LOG_INFO      = 6       #  informational
+    LOG_DEBUG     = 7       #  debug-level messages
+
+    #  facility codes
+    LOG_KERN      = 0       #  kernel messages
+    LOG_USER      = 1       #  random user-level messages
+    LOG_MAIL      = 2       #  mail system
+    LOG_DAEMON    = 3       #  system daemons
+    LOG_AUTH      = 4       #  security/authorization messages
+    LOG_SYSLOG    = 5       #  messages generated internally by syslogd
+    LOG_LPR       = 6       #  line printer subsystem
+    LOG_NEWS      = 7       #  network news subsystem
+    LOG_UUCP      = 8       #  UUCP subsystem
+    LOG_CRON      = 9       #  clock daemon
+    LOG_AUTHPRIV  = 10      #  security/authorization messages (private)
+    LOG_FTP       = 11      #  FTP daemon
+    LOG_NTP       = 12      #  NTP subsystem
+    LOG_SECURITY  = 13      #  Log audit
+    LOG_CONSOLE   = 14      #  Log alert
+    LOG_SOLCRON   = 15      #  Scheduling daemon (Solaris)
+
+    #  other codes through 15 reserved for system use
+    LOG_LOCAL0    = 16      #  reserved for local use
+    LOG_LOCAL1    = 17      #  reserved for local use
+    LOG_LOCAL2    = 18      #  reserved for local use
+    LOG_LOCAL3    = 19      #  reserved for local use
+    LOG_LOCAL4    = 20      #  reserved for local use
+    LOG_LOCAL5    = 21      #  reserved for local use
+    LOG_LOCAL6    = 22      #  reserved for local use
+    LOG_LOCAL7    = 23      #  reserved for local use
+
+    priority_names = {
+        "alert":    LOG_ALERT,
+        "crit":     LOG_CRIT,
+        "critical": LOG_CRIT,
+        "debug":    LOG_DEBUG,
+        "emerg":    LOG_EMERG,
+        "err":      LOG_ERR,
+        "error":    LOG_ERR,        #  DEPRECATED
+        "info":     LOG_INFO,
+        "notice":   LOG_NOTICE,
+        "panic":    LOG_EMERG,      #  DEPRECATED
+        "warn":     LOG_WARNING,    #  DEPRECATED
+        "warning":  LOG_WARNING,
+        }
+
+    facility_names = {
+        "auth":         LOG_AUTH,
+        "authpriv":     LOG_AUTHPRIV,
+        "console":      LOG_CONSOLE,
+        "cron":         LOG_CRON,
+        "daemon":       LOG_DAEMON,
+        "ftp":          LOG_FTP,
+        "kern":         LOG_KERN,
+        "lpr":          LOG_LPR,
+        "mail":         LOG_MAIL,
+        "news":         LOG_NEWS,
+        "ntp":          LOG_NTP,
+        "security":     LOG_SECURITY,
+        "solaris-cron": LOG_SOLCRON,
+        "syslog":       LOG_SYSLOG,
+        "user":         LOG_USER,
+        "uucp":         LOG_UUCP,
+        "local0":       LOG_LOCAL0,
+        "local1":       LOG_LOCAL1,
+        "local2":       LOG_LOCAL2,
+        "local3":       LOG_LOCAL3,
+        "local4":       LOG_LOCAL4,
+        "local5":       LOG_LOCAL5,
+        "local6":       LOG_LOCAL6,
+        "local7":       LOG_LOCAL7,
+        }
+
+    #The map below appears to be trivially lowercasing the key. However,
+    #there's more to it than meets the eye - in some locales, lowercasing
+    #gives unexpected results. See SF #1524081: in the Turkish locale,
+    #"INFO".lower() != "info"
+    priority_map = {
+        "DEBUG" : "debug",
+        "INFO" : "info",
+        "WARNING" : "warning",
+        "ERROR" : "error",
+        "CRITICAL" : "critical"
+    }
+
+    def __init__(self, address=('localhost', SYSLOG_UDP_PORT),
+                 facility=LOG_USER, socktype=None):
+        """
+        Initialize a handler.
+
+        If address is specified as a string, a UNIX socket is used. To log to a
+        local syslogd, "SysLogHandler(address="/dev/log")" can be used.
+        If facility is not specified, LOG_USER is used. If socktype is
+        specified as socket.SOCK_DGRAM or socket.SOCK_STREAM, that specific
+        socket type will be used. For Unix sockets, you can also specify a
+        socktype of None, in which case socket.SOCK_DGRAM will be used, falling
+        back to socket.SOCK_STREAM.
+        """
+        logging.Handler.__init__(self)
+
+        self.address = address
+        self.facility = facility
+        self.socktype = socktype
+
+        if isinstance(address, str):
+            self.unixsocket = True
+            # Syslog server may be unavailable during handler initialisation.
+            # C's openlog() function also ignores connection errors.
+            # Moreover, we ignore these errors while logging, so it not worse
+            # to ignore it also here.
+            try:
+                self._connect_unixsocket(address)
+            except OSError:
+                pass
+        else:
+            self.unixsocket = False
+            if socktype is None:
+                socktype = socket.SOCK_DGRAM
+            host, port = address
+            ress = socket.getaddrinfo(host, port, 0, socktype)
+            if not ress:
+                raise OSError("getaddrinfo returns an empty list")
+            for res in ress:
+                af, socktype, proto, _, sa = res
+                err = sock = None
+                try:
+                    sock = socket.socket(af, socktype, proto)
+                    if socktype == socket.SOCK_STREAM:
+                        sock.connect(sa)
+                    break
+                except OSError as exc:
+                    err = exc
+                    if sock is not None:
+                        sock.close()
+            if err is not None:
+                raise err
+            self.socket = sock
+            self.socktype = socktype
+
+    def _connect_unixsocket(self, address):
+        use_socktype = self.socktype
+        if use_socktype is None:
+            use_socktype = socket.SOCK_DGRAM
+        self.socket = socket.socket(socket.AF_UNIX, use_socktype)
+        try:
+            self.socket.connect(address)
+            # it worked, so set self.socktype to the used type
+            self.socktype = use_socktype
+        except OSError:
+            self.socket.close()
+            if self.socktype is not None:
+                # user didn't specify falling back, so fail
+                raise
+            use_socktype = socket.SOCK_STREAM
+            self.socket = socket.socket(socket.AF_UNIX, use_socktype)
+            try:
+                self.socket.connect(address)
+                # it worked, so set self.socktype to the used type
+                self.socktype = use_socktype
+            except OSError:
+                self.socket.close()
+                raise
+
+    def encodePriority(self, facility, priority):
+        """
+        Encode the facility and priority. You can pass in strings or
+        integers - if strings are passed, the facility_names and
+        priority_names mapping dictionaries are used to convert them to
+        integers.
+        """
+        if isinstance(facility, str):
+            facility = self.facility_names[facility]
+        if isinstance(priority, str):
+            priority = self.priority_names[priority]
+        return (facility << 3) | priority
+
+    def close(self):
+        """
+        Closes the socket.
+        """
+        self.acquire()
+        try:
+            self.socket.close()
+            logging.Handler.close(self)
+        finally:
+            self.release()
+
+    def mapPriority(self, levelName):
+        """
+        Map a logging level name to a key in the priority_names map.
+        This is useful in two scenarios: when custom levels are being
+        used, and in the case where you can't do a straightforward
+        mapping by lowercasing the logging level name because of locale-
+        specific issues (see SF #1524081).
+        """
+        return self.priority_map.get(levelName, "warning")
+
+    ident = ''          # prepended to all messages
+    append_nul = True   # some old syslog daemons expect a NUL terminator
+
+    def emit(self, record):
+        """
+        Emit a record.
+
+        The record is formatted, and then sent to the syslog server. If
+        exception information is present, it is NOT sent to the server.
+        """
+        try:
+            msg = self.format(record)
+            if self.ident:
+                msg = self.ident + msg
+            if self.append_nul:
+                msg += '\000'
+
+            # We need to convert record level to lowercase, maybe this will
+            # change in the future.
+            prio = '<%d>' % self.encodePriority(self.facility,
+                                                self.mapPriority(record.levelname))
+            prio = prio.encode('utf-8')
+            # Message is a string. Convert to bytes as required by RFC 5424
+            msg = msg.encode('utf-8')
+            msg = prio + msg
+            if self.unixsocket:
+                try:
+                    self.socket.send(msg)
+                except OSError:
+                    self.socket.close()
+                    self._connect_unixsocket(self.address)
+                    self.socket.send(msg)
+            elif self.socktype == socket.SOCK_DGRAM:
+                self.socket.sendto(msg, self.address)
+            else:
+                self.socket.sendall(msg)
+        except Exception:
+            self.handleError(record)
+
+class SMTPHandler(logging.Handler):
+    """
+    A handler class which sends an SMTP email for each logging event.
+    """
+    def __init__(self, mailhost, fromaddr, toaddrs, subject,
+                 credentials=None, secure=None, timeout=5.0):
+        """
+        Initialize the handler.
+
+        Initialize the instance with the from and to addresses and subject
+        line of the email. To specify a non-standard SMTP port, use the
+        (host, port) tuple format for the mailhost argument. To specify
+        authentication credentials, supply a (username, password) tuple
+        for the credentials argument. To specify the use of a secure
+        protocol (TLS), pass in a tuple for the secure argument. This will
+        only be used when authentication credentials are supplied. The tuple
+        will be either an empty tuple, or a single-value tuple with the name
+        of a keyfile, or a 2-value tuple with the names of the keyfile and
+        certificate file. (This tuple is passed to the `starttls` method).
+        A timeout in seconds can be specified for the SMTP connection (the
+        default is one second).
+        """
+        logging.Handler.__init__(self)
+        if isinstance(mailhost, (list, tuple)):
+            self.mailhost, self.mailport = mailhost
+        else:
+            self.mailhost, self.mailport = mailhost, None
+        if isinstance(credentials, (list, tuple)):
+            self.username, self.password = credentials
+        else:
+            self.username = None
+        self.fromaddr = fromaddr
+        if isinstance(toaddrs, str):
+            toaddrs = [toaddrs]
+        self.toaddrs = toaddrs
+        self.subject = subject
+        self.secure = secure
+        self.timeout = timeout
+
+    def getSubject(self, record):
+        """
+        Determine the subject for the email.
+
+        If you want to specify a subject line which is record-dependent,
+        override this method.
+        """
+        return self.subject
+
+    def emit(self, record):
+        """
+        Emit a record.
+
+        Format the record and send it to the specified addressees.
+        """
+        try:
+            import smtplib
+            from email.message import EmailMessage
+            import email.utils
+
+            port = self.mailport
+            if not port:
+                port = smtplib.SMTP_PORT
+            smtp = smtplib.SMTP(self.mailhost, port, timeout=self.timeout)
+            msg = EmailMessage()
+            msg['From'] = self.fromaddr
+            msg['To'] = ','.join(self.toaddrs)
+            msg['Subject'] = self.getSubject(record)
+            msg['Date'] = email.utils.localtime()
+            msg.set_content(self.format(record))
+            if self.username:
+                if self.secure is not None:
+                    smtp.ehlo()
+                    smtp.starttls(*self.secure)
+                    smtp.ehlo()
+                smtp.login(self.username, self.password)
+            smtp.send_message(msg)
+            smtp.quit()
+        except Exception:
+            self.handleError(record)
+
+class NTEventLogHandler(logging.Handler):
+    """
+    A handler class which sends events to the NT Event Log. Adds a
+    registry entry for the specified application name. If no dllname is
+    provided, win32service.pyd (which contains some basic message
+    placeholders) is used. Note that use of these placeholders will make
+    your event logs big, as the entire message source is held in the log.
+    If you want slimmer logs, you have to pass in the name of your own DLL
+    which contains the message definitions you want to use in the event log.
+    """
+    def __init__(self, appname, dllname=None, logtype="Application"):
+        logging.Handler.__init__(self)
+        try:
+            import win32evtlogutil, win32evtlog
+            self.appname = appname
+            self._welu = win32evtlogutil
+            if not dllname:
+                dllname = os.path.split(self._welu.__file__)
+                dllname = os.path.split(dllname[0])
+                dllname = os.path.join(dllname[0], r'win32service.pyd')
+            self.dllname = dllname
+            self.logtype = logtype
+            # Administrative privileges are required to add a source to the registry.
+            # This may not be available for a user that just wants to add to an
+            # existing source - handle this specific case.
+            try:
+                self._welu.AddSourceToRegistry(appname, dllname, logtype)
+            except Exception as e:
+                # This will probably be a pywintypes.error. Only raise if it's not
+                # an "access denied" error, else let it pass
+                if getattr(e, 'winerror', None) != 5:  # not access denied
+                    raise
+            self.deftype = win32evtlog.EVENTLOG_ERROR_TYPE
+            self.typemap = {
+                logging.DEBUG   : win32evtlog.EVENTLOG_INFORMATION_TYPE,
+                logging.INFO    : win32evtlog.EVENTLOG_INFORMATION_TYPE,
+                logging.WARNING : win32evtlog.EVENTLOG_WARNING_TYPE,
+                logging.ERROR   : win32evtlog.EVENTLOG_ERROR_TYPE,
+                logging.CRITICAL: win32evtlog.EVENTLOG_ERROR_TYPE,
+         }
+        except ImportError:
+            print("The Python Win32 extensions for NT (service, event "\
+                        "logging) appear not to be available.")
+            self._welu = None
+
+    def getMessageID(self, record):
+        """
+        Return the message ID for the event record. If you are using your
+        own messages, you could do this by having the msg passed to the
+        logger being an ID rather than a formatting string. Then, in here,
+        you could use a dictionary lookup to get the message ID. This
+        version returns 1, which is the base message ID in win32service.pyd.
+        """
+        return 1
+
+    def getEventCategory(self, record):
+        """
+        Return the event category for the record.
+
+        Override this if you want to specify your own categories. This version
+        returns 0.
+        """
+        return 0
+
+    def getEventType(self, record):
+        """
+        Return the event type for the record.
+
+        Override this if you want to specify your own types. This version does
+        a mapping using the handler's typemap attribute, which is set up in
+        __init__() to a dictionary which contains mappings for DEBUG, INFO,
+        WARNING, ERROR and CRITICAL. If you are using your own levels you will
+        either need to override this method or place a suitable dictionary in
+        the handler's typemap attribute.
+        """
+        return self.typemap.get(record.levelno, self.deftype)
+
+    def emit(self, record):
+        """
+        Emit a record.
+
+        Determine the message ID, event category and event type. Then
+        log the message in the NT event log.
+        """
+        if self._welu:
+            try:
+                id = self.getMessageID(record)
+                cat = self.getEventCategory(record)
+                type = self.getEventType(record)
+                msg = self.format(record)
+                self._welu.ReportEvent(self.appname, id, cat, type, [msg])
+            except Exception:
+                self.handleError(record)
+
+    def close(self):
+        """
+        Clean up this handler.
+
+        You can remove the application name from the registry as a
+        source of event log entries. However, if you do this, you will
+        not be able to see the events as you intended in the Event Log
+        Viewer - it needs to be able to access the registry to get the
+        DLL name.
+        """
+        #self._welu.RemoveSourceFromRegistry(self.appname, self.logtype)
+        logging.Handler.close(self)
+
+class HTTPHandler(logging.Handler):
+    """
+    A class which sends records to a web server, using either GET or
+    POST semantics.
+    """
+    def __init__(self, host, url, method="GET", secure=False, credentials=None,
+                 context=None):
+        """
+        Initialize the instance with the host, the request URL, and the method
+        ("GET" or "POST")
+        """
+        logging.Handler.__init__(self)
+        method = method.upper()
+        if method not in ["GET", "POST"]:
+            raise ValueError("method must be GET or POST")
+        if not secure and context is not None:
+            raise ValueError("context parameter only makes sense "
+                             "with secure=True")
+        self.host = host
+        self.url = url
+        self.method = method
+        self.secure = secure
+        self.credentials = credentials
+        self.context = context
+
+    def mapLogRecord(self, record):
+        """
+        Default implementation of mapping the log record into a dict
+        that is sent as the CGI data. Overwrite in your class.
+        Contributed by Franz Glasner.
+        """
+        return record.__dict__
+
+    def getConnection(self, host, secure):
+        """
+        get a HTTP[S]Connection.
+
+        Override when a custom connection is required, for example if
+        there is a proxy.
+        """
+        import http.client
+        if secure:
+            connection = http.client.HTTPSConnection(host, context=self.context)
+        else:
+            connection = http.client.HTTPConnection(host)
+        return connection
+
+    def emit(self, record):
+        """
+        Emit a record.
+
+        Send the record to the web server as a percent-encoded dictionary
+        """
+        try:
+            import urllib.parse
+            host = self.host
+            h = self.getConnection(host, self.secure)
+            url = self.url
+            data = urllib.parse.urlencode(self.mapLogRecord(record))
+            if self.method == "GET":
+                if (url.find('?') >= 0):
+                    sep = '&'
+                else:
+                    sep = '?'
+                url = url + "%c%s" % (sep, data)
+            h.putrequest(self.method, url)
+            # support multiple hosts on one IP address...
+            # need to strip optional :port from host, if present
+            i = host.find(":")
+            if i >= 0:
+                host = host[:i]
+            # See issue #30904: putrequest call above already adds this header
+            # on Python 3.x.
+            # h.putheader("Host", host)
+            if self.method == "POST":
+                h.putheader("Content-type",
+                            "application/x-www-form-urlencoded")
+                h.putheader("Content-length", str(len(data)))
+            if self.credentials:
+                import base64
+                s = ('%s:%s' % self.credentials).encode('utf-8')
+                s = 'Basic ' + base64.b64encode(s).strip().decode('ascii')
+                h.putheader('Authorization', s)
+            h.endheaders()
+            if self.method == "POST":
+                h.send(data.encode('utf-8'))
+            h.getresponse()    #can't do anything with the result
+        except Exception:
+            self.handleError(record)
+
+class BufferingHandler(logging.Handler):
+    """
+  A handler class which buffers logging records in memory. Whenever each
+  record is added to the buffer, a check is made to see if the buffer should
+  be flushed. If it should, then flush() is expected to do what's needed.
+    """
+    def __init__(self, capacity):
+        """
+        Initialize the handler with the buffer size.
+        """
+        logging.Handler.__init__(self)
+        self.capacity = capacity
+        self.buffer = []
+
+    def shouldFlush(self, record):
+        """
+        Should the handler flush its buffer?
+
+        Returns true if the buffer is up to capacity. This method can be
+        overridden to implement custom flushing strategies.
+        """
+        return (len(self.buffer) >= self.capacity)
+
+    def emit(self, record):
+        """
+        Emit a record.
+
+        Append the record. If shouldFlush() tells us to, call flush() to process
+        the buffer.
+        """
+        self.buffer.append(record)
+        if self.shouldFlush(record):
+            self.flush()
+
+    def flush(self):
+        """
+        Override to implement custom flushing behaviour.
+
+        This version just zaps the buffer to empty.
+        """
+        self.acquire()
+        try:
+            self.buffer.clear()
+        finally:
+            self.release()
+
+    def close(self):
+        """
+        Close the handler.
+
+        This version just flushes and chains to the parent class' close().
+        """
+        try:
+            self.flush()
+        finally:
+            logging.Handler.close(self)
+
+class MemoryHandler(BufferingHandler):
+    """
+    A handler class which buffers logging records in memory, periodically
+    flushing them to a target handler. Flushing occurs whenever the buffer
+    is full, or when an event of a certain severity or greater is seen.
+    """
+    def __init__(self, capacity, flushLevel=logging.ERROR, target=None,
+                 flushOnClose=True):
+        """
+        Initialize the handler with the buffer size, the level at which
+        flushing should occur and an optional target.
+
+        Note that without a target being set either here or via setTarget(),
+        a MemoryHandler is no use to anyone!
+
+        The ``flushOnClose`` argument is ``True`` for backward compatibility
+        reasons - the old behaviour is that when the handler is closed, the
+        buffer is flushed, even if the flush level hasn't been exceeded nor the
+        capacity exceeded. To prevent this, set ``flushOnClose`` to ``False``.
+        """
+        BufferingHandler.__init__(self, capacity)
+        self.flushLevel = flushLevel
+        self.target = target
+        # See Issue #26559 for why this has been added
+        self.flushOnClose = flushOnClose
+
+    def shouldFlush(self, record):
+        """
+        Check for buffer full or a record at the flushLevel or higher.
+        """
+        return (len(self.buffer) >= self.capacity) or \
+                (record.levelno >= self.flushLevel)
+
+    def setTarget(self, target):
+        """
+        Set the target handler for this handler.
+        """
+        self.acquire()
+        try:
+            self.target = target
+        finally:
+            self.release()
+
+    def flush(self):
+        """
+        For a MemoryHandler, flushing means just sending the buffered
+        records to the target, if there is one. Override if you want
+        different behaviour.
+
+        The record buffer is also cleared by this operation.
+        """
+        self.acquire()
+        try:
+            if self.target:
+                for record in self.buffer:
+                    self.target.handle(record)
+                self.buffer.clear()
+        finally:
+            self.release()
+
+    def close(self):
+        """
+        Flush, if appropriately configured, set the target to None and lose the
+        buffer.
+        """
+        try:
+            if self.flushOnClose:
+                self.flush()
+        finally:
+            self.acquire()
+            try:
+                self.target = None
+                BufferingHandler.close(self)
+            finally:
+                self.release()
+
+
+class QueueHandler(logging.Handler):
+    """
+    This handler sends events to a queue. Typically, it would be used together
+    with a multiprocessing Queue to centralise logging to file in one process
+    (in a multi-process application), so as to avoid file write contention
+    between processes.
+
+    This code is new in Python 3.2, but this class can be copy pasted into
+    user code for use with earlier Python versions.
+    """
+
+    def __init__(self, queue):
+        """
+        Initialise an instance, using the passed queue.
+        """
+        logging.Handler.__init__(self)
+        self.queue = queue
+
+    def enqueue(self, record):
+        """
+        Enqueue a record.
+
+        The base implementation uses put_nowait. You may want to override
+        this method if you want to use blocking, timeouts or custom queue
+        implementations.
+        """
+        self.queue.put_nowait(record)
+
+    def prepare(self, record):
+        """
+        Prepares a record for queuing. The object returned by this method is
+        enqueued.
+
+        The base implementation formats the record to merge the message
+        and arguments, and removes unpickleable items from the record
+        in-place.
+
+        You might want to override this method if you want to convert
+        the record to a dict or JSON string, or send a modified copy
+        of the record while leaving the original intact.
+        """
+        # The format operation gets traceback text into record.exc_text
+        # (if there's exception data), and also returns the formatted
+        # message. We can then use this to replace the original
+        # msg + args, as these might be unpickleable. We also zap the
+        # exc_info, exc_text and stack_info attributes, as they are no longer
+        # needed and, if not None, will typically not be pickleable.
+        msg = self.format(record)
+        # bpo-35726: make copy of record to avoid affecting other handlers in the chain.
+        record = copy.copy(record)
+        record.message = msg
+        record.msg = msg
+        record.args = None
+        record.exc_info = None
+        record.exc_text = None
+        record.stack_info = None
+        return record
+
+    def emit(self, record):
+        """
+        Emit a record.
+
+        Writes the LogRecord to the queue, preparing it for pickling first.
+        """
+        try:
+            self.enqueue(self.prepare(record))
+        except Exception:
+            self.handleError(record)
+
+
+class QueueListener(object):
+    """
+    This class implements an internal threaded listener which watches for
+    LogRecords being added to a queue, removes them and passes them to a
+    list of handlers for processing.
+    """
+    _sentinel = None
+
+    def __init__(self, queue, *handlers, respect_handler_level=False):
+        """
+        Initialise an instance with the specified queue and
+        handlers.
+        """
+        self.queue = queue
+        self.handlers = handlers
+        self._thread = None
+        self.respect_handler_level = respect_handler_level
+
+    def dequeue(self, block):
+        """
+        Dequeue a record and return it, optionally blocking.
+
+        The base implementation uses get. You may want to override this method
+        if you want to use timeouts or work with custom queue implementations.
+        """
+        return self.queue.get(block)
+
+    def start(self):
+        """
+        Start the listener.
+
+        This starts up a background thread to monitor the queue for
+        LogRecords to process.
+        """
+        self._thread = t = threading.Thread(target=self._monitor)
+        t.daemon = True
+        t.start()
+
+    def prepare(self, record):
+        """
+        Prepare a record for handling.
+
+        This method just returns the passed-in record. You may want to
+        override this method if you need to do any custom marshalling or
+        manipulation of the record before passing it to the handlers.
+        """
+        return record
+
+    def handle(self, record):
+        """
+        Handle a record.
+
+        This just loops through the handlers offering them the record
+        to handle.
+        """
+        record = self.prepare(record)
+        for handler in self.handlers:
+            if not self.respect_handler_level:
+                process = True
+            else:
+                process = record.levelno >= handler.level
+            if process:
+                handler.handle(record)
+
+    def _monitor(self):
+        """
+        Monitor the queue for records, and ask the handler
+        to deal with them.
+
+        This method runs on a separate, internal thread.
+        The thread will terminate if it sees a sentinel object in the queue.
+        """
+        q = self.queue
+        has_task_done = hasattr(q, 'task_done')
+        while True:
+            try:
+                record = self.dequeue(True)
+                if record is self._sentinel:
+                    if has_task_done:
+                        q.task_done()
+                    break
+                self.handle(record)
+                if has_task_done:
+                    q.task_done()
+            except queue.Empty:
+                break
+
+    def enqueue_sentinel(self):
+        """
+        This is used to enqueue the sentinel record.
+
+        The base implementation uses put_nowait. You may want to override this
+        method if you want to use timeouts or work with custom queue
+        implementations.
+        """
+        self.queue.put_nowait(self._sentinel)
+
+    def stop(self):
+        """
+        Stop the listener.
+
+        This asks the thread to terminate, and then waits for it to do so.
+        Note that if you don't call this before your application exits, there
+        may be some records still left on the queue, which won't be processed.
+        """
+        self.enqueue_sentinel()
+        self._thread.join()
+        self._thread = None

parrot/lib/python3.10/turtledemo/__init__.py

@@ -0,0 +1,14 @@
+"""
+    --------------------------------------
+        About this viewer
+    --------------------------------------
+
+    Tiny demo viewer to view turtle graphics example scripts.
+
+    Quickly and dirtyly assembled by Gregor Lingl.
+    June, 2006
+
+    For more information see: turtledemo - Help
+
+    Have fun!
+"""

parrot/lib/python3.10/turtledemo/__main__.py

@@ -0,0 +1,398 @@
+#!/usr/bin/env python3
+
+"""
+  ----------------------------------------------
+      turtleDemo - Help
+  ----------------------------------------------
+
+  This document has two sections:
+
+  (1) How to use the demo viewer
+  (2) How to add your own demos to the demo repository
+
+
+  (1) How to use the demo viewer.
+
+  Select a demoscript from the example menu.
+  The (syntax colored) source code appears in the left
+  source code window. IT CANNOT BE EDITED, but ONLY VIEWED!
+
+  The demo viewer windows can be resized. The divider between text
+  and canvas can be moved by grabbing it with the mouse. The text font
+  size can be changed from the menu and with Control/Command '-'/'+'.
+  It can also be changed on most systems with Control-mousewheel
+  when the mouse is over the text.
+
+  Press START button to start the demo.
+  Stop execution by pressing the STOP button.
+  Clear screen by pressing the CLEAR button.
+  Restart by pressing the START button again.
+
+  SPECIAL demos, such as clock.py are those which run EVENTDRIVEN.
+
+      Press START button to start the demo.
+
+      - Until the EVENTLOOP is entered everything works
+      as in an ordinary demo script.
+
+      - When the EVENTLOOP is entered, you control the
+      application by using the mouse and/or keys (or it's
+      controlled by some timer events)
+      To stop it you can and must press the STOP button.
+
+      While the EVENTLOOP is running, the examples menu is disabled.
+
+      - Only after having pressed the STOP button, you may
+      restart it or choose another example script.
+
+   * * * * * * * *
+   In some rare situations there may occur interferences/conflicts
+   between events concerning the demo script and those concerning the
+   demo-viewer. (They run in the same process.) Strange behaviour may be
+   the consequence and in the worst case you must close and restart the
+   viewer.
+   * * * * * * * *
+
+
+   (2) How to add your own demos to the demo repository
+
+   - Place the file in the same directory as turtledemo/__main__.py
+     IMPORTANT! When imported, the demo should not modify the system
+     by calling functions in other modules, such as sys, tkinter, or
+     turtle. Global variables should be initialized in main().
+
+   - The code must contain a main() function which will
+     be executed by the viewer (see provided example scripts).
+     It may return a string which will be displayed in the Label below
+     the source code window (when execution has finished.)
+
+   - In order to run mydemo.py by itself, such as during development,
+     add the following at the end of the file:
+
+    if __name__ == '__main__':
+        main()
+        mainloop()  # keep window open
+
+    python -m turtledemo.mydemo  # will then run it
+
+   - If the demo is EVENT DRIVEN, main must return the string
+     "EVENTLOOP". This informs the demo viewer that the script is
+     still running and must be stopped by the user!
+
+     If an "EVENTLOOP" demo runs by itself, as with clock, which uses
+     ontimer, or minimal_hanoi, which loops by recursion, then the
+     code should catch the turtle.Terminator exception that will be
+     raised when the user presses the STOP button.  (Paint is not such
+     a demo; it only acts in response to mouse clicks and movements.)
+"""
+import sys
+import os
+
+from tkinter import *
+from idlelib.colorizer import ColorDelegator, color_config
+from idlelib.percolator import Percolator
+from idlelib.textview import view_text
+from turtledemo import __doc__ as about_turtledemo
+
+import turtle
+
+demo_dir = os.path.dirname(os.path.abspath(__file__))
+darwin = sys.platform == 'darwin'
+
+STARTUP = 1
+READY = 2
+RUNNING = 3
+DONE = 4
+EVENTDRIVEN = 5
+
+menufont = ("Arial", 12, NORMAL)
+btnfont = ("Arial", 12, 'bold')
+txtfont = ['Lucida Console', 10, 'normal']
+
+MINIMUM_FONT_SIZE = 6
+MAXIMUM_FONT_SIZE = 100
+font_sizes = [8, 9, 10, 11, 12, 14, 18, 20, 22, 24, 30]
+
+def getExampleEntries():
+    return [entry[:-3] for entry in os.listdir(demo_dir) if
+            entry.endswith(".py") and entry[0] != '_']
+
+help_entries = (  # (help_label,  help_doc)
+    ('Turtledemo help', __doc__),
+    ('About turtledemo', about_turtledemo),
+    ('About turtle module', turtle.__doc__),
+    )
+
+
+class DemoWindow(object):
+
+    def __init__(self, filename=None):
+        self.root = root = turtle._root = Tk()
+        root.title('Python turtle-graphics examples')
+        root.wm_protocol("WM_DELETE_WINDOW", self._destroy)
+
+        if darwin:
+            import subprocess
+            # Make sure we are the currently activated OS X application
+            # so that our menu bar appears.
+            subprocess.run(
+                    [
+                        'osascript',
+                        '-e', 'tell application "System Events"',
+                        '-e', 'set frontmost of the first process whose '
+                              'unix id is {} to true'.format(os.getpid()),
+                        '-e', 'end tell',
+                    ],
+                    stderr=subprocess.DEVNULL,
+                    stdout=subprocess.DEVNULL,)
+
+        root.grid_rowconfigure(0, weight=1)
+        root.grid_columnconfigure(0, weight=1)
+        root.grid_columnconfigure(1, minsize=90, weight=1)
+        root.grid_columnconfigure(2, minsize=90, weight=1)
+        root.grid_columnconfigure(3, minsize=90, weight=1)
+
+        self.mBar = Menu(root, relief=RAISED, borderwidth=2)
+        self.mBar.add_cascade(menu=self.makeLoadDemoMenu(self.mBar),
+                              label='Examples', underline=0)
+        self.mBar.add_cascade(menu=self.makeFontMenu(self.mBar),
+                              label='Fontsize', underline=0)
+        self.mBar.add_cascade(menu=self.makeHelpMenu(self.mBar),
+                              label='Help', underline=0)
+        root['menu'] = self.mBar
+
+        pane = PanedWindow(orient=HORIZONTAL, sashwidth=5,
+                           sashrelief=SOLID, bg='#ddd')
+        pane.add(self.makeTextFrame(pane))
+        pane.add(self.makeGraphFrame(pane))
+        pane.grid(row=0, columnspan=4, sticky='news')
+
+        self.output_lbl = Label(root, height= 1, text=" --- ", bg="#ddf",
+                                font=("Arial", 16, 'normal'), borderwidth=2,
+                                relief=RIDGE)
+        if darwin:  # Leave Mac button colors alone - #44254.
+            self.start_btn = Button(root, text=" START ", font=btnfont,
+                                    fg='#00cc22', command=self.startDemo)
+            self.stop_btn = Button(root, text=" STOP ", font=btnfont,
+                                   fg='#00cc22', command=self.stopIt)
+            self.clear_btn = Button(root, text=" CLEAR ", font=btnfont,
+                                    fg='#00cc22', command = self.clearCanvas)
+        else:
+            self.start_btn = Button(root, text=" START ", font=btnfont,
+                                    fg="white", disabledforeground = "#fed",
+                                    command=self.startDemo)
+            self.stop_btn = Button(root, text=" STOP ", font=btnfont,
+                                   fg="white", disabledforeground = "#fed",
+                                   command=self.stopIt)
+            self.clear_btn = Button(root, text=" CLEAR ", font=btnfont,
+                                    fg="white", disabledforeground="#fed",
+                                    command = self.clearCanvas)
+        self.output_lbl.grid(row=1, column=0, sticky='news', padx=(0,5))
+        self.start_btn.grid(row=1, column=1, sticky='ew')
+        self.stop_btn.grid(row=1, column=2, sticky='ew')
+        self.clear_btn.grid(row=1, column=3, sticky='ew')
+
+        Percolator(self.text).insertfilter(ColorDelegator())
+        self.dirty = False
+        self.exitflag = False
+        if filename:
+            self.loadfile(filename)
+        self.configGUI(DISABLED, DISABLED, DISABLED,
+                       "Choose example from menu", "black")
+        self.state = STARTUP
+
+
+    def onResize(self, event):
+        cwidth = self._canvas.winfo_width()
+        cheight = self._canvas.winfo_height()
+        self._canvas.xview_moveto(0.5*(self.canvwidth-cwidth)/self.canvwidth)
+        self._canvas.yview_moveto(0.5*(self.canvheight-cheight)/self.canvheight)
+
+    def makeTextFrame(self, root):
+        self.text_frame = text_frame = Frame(root)
+        self.text = text = Text(text_frame, name='text', padx=5,
+                                wrap='none', width=45)
+        color_config(text)
+
+        self.vbar = vbar = Scrollbar(text_frame, name='vbar')
+        vbar['command'] = text.yview
+        vbar.pack(side=LEFT, fill=Y)
+        self.hbar = hbar = Scrollbar(text_frame, name='hbar', orient=HORIZONTAL)
+        hbar['command'] = text.xview
+        hbar.pack(side=BOTTOM, fill=X)
+        text['yscrollcommand'] = vbar.set
+        text['xscrollcommand'] = hbar.set
+
+        text['font'] = tuple(txtfont)
+        shortcut = 'Command' if darwin else 'Control'
+        text.bind_all('<%s-minus>' % shortcut, self.decrease_size)
+        text.bind_all('<%s-underscore>' % shortcut, self.decrease_size)
+        text.bind_all('<%s-equal>' % shortcut, self.increase_size)
+        text.bind_all('<%s-plus>' % shortcut, self.increase_size)
+        text.bind('<Control-MouseWheel>', self.update_mousewheel)
+        text.bind('<Control-Button-4>', self.increase_size)
+        text.bind('<Control-Button-5>', self.decrease_size)
+
+        text.pack(side=LEFT, fill=BOTH, expand=1)
+        return text_frame
+
+    def makeGraphFrame(self, root):
+        turtle._Screen._root = root
+        self.canvwidth = 1000
+        self.canvheight = 800
+        turtle._Screen._canvas = self._canvas = canvas = turtle.ScrolledCanvas(
+                root, 800, 600, self.canvwidth, self.canvheight)
+        canvas.adjustScrolls()
+        canvas._rootwindow.bind('<Configure>', self.onResize)
+        canvas._canvas['borderwidth'] = 0
+
+        self.screen = _s_ = turtle.Screen()
+        turtle.TurtleScreen.__init__(_s_, _s_._canvas)
+        self.scanvas = _s_._canvas
+        turtle.RawTurtle.screens = [_s_]
+        return canvas
+
+    def set_txtsize(self, size):
+        txtfont[1] = size
+        self.text['font'] = tuple(txtfont)
+        self.output_lbl['text'] = 'Font size %d' % size
+
+    def decrease_size(self, dummy=None):
+        self.set_txtsize(max(txtfont[1] - 1, MINIMUM_FONT_SIZE))
+        return 'break'
+
+    def increase_size(self, dummy=None):
+        self.set_txtsize(min(txtfont[1] + 1, MAXIMUM_FONT_SIZE))
+        return 'break'
+
+    def update_mousewheel(self, event):
+        # For wheel up, event.delta = 120 on Windows, -1 on darwin.
+        # X-11 sends Control-Button-4 event instead.
+        if (event.delta < 0) == (not darwin):
+            return self.decrease_size()
+        else:
+            return self.increase_size()
+
+    def configGUI(self, start, stop, clear, txt="", color="blue"):
+        if darwin:  # Leave Mac button colors alone - #44254.
+            self.start_btn.config(state=start)
+            self.stop_btn.config(state=stop)
+            self.clear_btn.config(state=clear)
+        else:
+            self.start_btn.config(state=start,
+                                  bg="#d00" if start == NORMAL else "#fca")
+            self.stop_btn.config(state=stop,
+                                 bg="#d00" if stop == NORMAL else "#fca")
+            self.clear_btn.config(state=clear,
+                                  bg="#d00" if clear == NORMAL else "#fca")
+        self.output_lbl.config(text=txt, fg=color)
+
+    def makeLoadDemoMenu(self, master):
+        menu = Menu(master)
+
+        for entry in getExampleEntries():
+            def load(entry=entry):
+                self.loadfile(entry)
+            menu.add_command(label=entry, underline=0,
+                             font=menufont, command=load)
+        return menu
+
+    def makeFontMenu(self, master):
+        menu = Menu(master)
+        menu.add_command(label="Decrease (C-'-')", command=self.decrease_size,
+                         font=menufont)
+        menu.add_command(label="Increase (C-'+')", command=self.increase_size,
+                         font=menufont)
+        menu.add_separator()
+
+        for size in font_sizes:
+            def resize(size=size):
+                self.set_txtsize(size)
+            menu.add_command(label=str(size), underline=0,
+                             font=menufont, command=resize)
+        return menu
+
+    def makeHelpMenu(self, master):
+        menu = Menu(master)
+
+        for help_label, help_file in help_entries:
+            def show(help_label=help_label, help_file=help_file):
+                view_text(self.root, help_label, help_file)
+            menu.add_command(label=help_label, font=menufont, command=show)
+        return menu
+
+    def refreshCanvas(self):
+        if self.dirty:
+            self.screen.clear()
+            self.dirty=False
+
+    def loadfile(self, filename):
+        self.clearCanvas()
+        turtle.TurtleScreen._RUNNING = False
+        modname = 'turtledemo.' + filename
+        __import__(modname)
+        self.module = sys.modules[modname]
+        with open(self.module.__file__, 'r') as f:
+            chars = f.read()
+        self.text.delete("1.0", "end")
+        self.text.insert("1.0", chars)
+        self.root.title(filename + " - a Python turtle graphics example")
+        self.configGUI(NORMAL, DISABLED, DISABLED,
+                       "Press start button", "red")
+        self.state = READY
+
+    def startDemo(self):
+        self.refreshCanvas()
+        self.dirty = True
+        turtle.TurtleScreen._RUNNING = True
+        self.configGUI(DISABLED, NORMAL, DISABLED,
+                       "demo running...", "black")
+        self.screen.clear()
+        self.screen.mode("standard")
+        self.state = RUNNING
+
+        try:
+            result = self.module.main()
+            if result == "EVENTLOOP":
+                self.state = EVENTDRIVEN
+            else:
+                self.state = DONE
+        except turtle.Terminator:
+            if self.root is None:
+                return
+            self.state = DONE
+            result = "stopped!"
+        if self.state == DONE:
+            self.configGUI(NORMAL, DISABLED, NORMAL,
+                           result)
+        elif self.state == EVENTDRIVEN:
+            self.exitflag = True
+            self.configGUI(DISABLED, NORMAL, DISABLED,
+                           "use mouse/keys or STOP", "red")
+
+    def clearCanvas(self):
+        self.refreshCanvas()
+        self.screen._delete("all")
+        self.scanvas.config(cursor="")
+        self.configGUI(NORMAL, DISABLED, DISABLED)
+
+    def stopIt(self):
+        if self.exitflag:
+            self.clearCanvas()
+            self.exitflag = False
+            self.configGUI(NORMAL, DISABLED, DISABLED,
+                           "STOPPED!", "red")
+        turtle.TurtleScreen._RUNNING = False
+
+    def _destroy(self):
+        turtle.TurtleScreen._RUNNING = False
+        self.root.destroy()
+        self.root = None
+
+
+def main():
+    demo = DemoWindow()
+    demo.root.mainloop()
+
+if __name__ == '__main__':
+    main()

parrot/lib/python3.10/turtledemo/bytedesign.py

@@ -0,0 +1,161 @@
+#!/usr/bin/env python3
+"""      turtle-example-suite:
+
+        tdemo_bytedesign.py
+
+An example adapted from the example-suite
+of PythonCard's turtle graphics.
+
+It's based on an article in BYTE magazine
+Problem Solving with Logo: Using Turtle
+Graphics to Redraw a Design
+November 1982, p. 118 - 134
+
+-------------------------------------------
+
+Due to the statement
+
+t.delay(0)
+
+in line 152, which sets the animation delay
+to 0, this animation runs in "line per line"
+mode as fast as possible.
+"""
+
+from turtle import Turtle, mainloop
+from time import perf_counter as clock
+
+# wrapper for any additional drawing routines
+# that need to know about each other
+class Designer(Turtle):
+
+    def design(self, homePos, scale):
+        self.up()
+        for i in range(5):
+            self.forward(64.65 * scale)
+            self.down()
+            self.wheel(self.position(), scale)
+            self.up()
+            self.backward(64.65 * scale)
+            self.right(72)
+        self.up()
+        self.goto(homePos)
+        self.right(36)
+        self.forward(24.5 * scale)
+        self.right(198)
+        self.down()
+        self.centerpiece(46 * scale, 143.4, scale)
+        self.getscreen().tracer(True)
+
+    def wheel(self, initpos, scale):
+        self.right(54)
+        for i in range(4):
+            self.pentpiece(initpos, scale)
+        self.down()
+        self.left(36)
+        for i in range(5):
+            self.tripiece(initpos, scale)
+        self.left(36)
+        for i in range(5):
+            self.down()
+            self.right(72)
+            self.forward(28 * scale)
+            self.up()
+            self.backward(28 * scale)
+        self.left(54)
+        self.getscreen().update()
+
+    def tripiece(self, initpos, scale):
+        oldh = self.heading()
+        self.down()
+        self.backward(2.5 * scale)
+        self.tripolyr(31.5 * scale, scale)
+        self.up()
+        self.goto(initpos)
+        self.setheading(oldh)
+        self.down()
+        self.backward(2.5 * scale)
+        self.tripolyl(31.5 * scale, scale)
+        self.up()
+        self.goto(initpos)
+        self.setheading(oldh)
+        self.left(72)
+        self.getscreen().update()
+
+    def pentpiece(self, initpos, scale):
+        oldh = self.heading()
+        self.up()
+        self.forward(29 * scale)
+        self.down()
+        for i in range(5):
+            self.forward(18 * scale)
+            self.right(72)
+        self.pentr(18 * scale, 75, scale)
+        self.up()
+        self.goto(initpos)
+        self.setheading(oldh)
+        self.forward(29 * scale)
+        self.down()
+        for i in range(5):
+            self.forward(18 * scale)
+            self.right(72)
+        self.pentl(18 * scale, 75, scale)
+        self.up()
+        self.goto(initpos)
+        self.setheading(oldh)
+        self.left(72)
+        self.getscreen().update()
+
+    def pentl(self, side, ang, scale):
+        if side < (2 * scale): return
+        self.forward(side)
+        self.left(ang)
+        self.pentl(side - (.38 * scale), ang, scale)
+
+    def pentr(self, side, ang, scale):
+        if side < (2 * scale): return
+        self.forward(side)
+        self.right(ang)
+        self.pentr(side - (.38 * scale), ang, scale)
+
+    def tripolyr(self, side, scale):
+        if side < (4 * scale): return
+        self.forward(side)
+        self.right(111)
+        self.forward(side / 1.78)
+        self.right(111)
+        self.forward(side / 1.3)
+        self.right(146)
+        self.tripolyr(side * .75, scale)
+
+    def tripolyl(self, side, scale):
+        if side < (4 * scale): return
+        self.forward(side)
+        self.left(111)
+        self.forward(side / 1.78)
+        self.left(111)
+        self.forward(side / 1.3)
+        self.left(146)
+        self.tripolyl(side * .75, scale)
+
+    def centerpiece(self, s, a, scale):
+        self.forward(s); self.left(a)
+        if s < (7.5 * scale):
+            return
+        self.centerpiece(s - (1.2 * scale), a, scale)
+
+def main():
+    t = Designer()
+    t.speed(0)
+    t.hideturtle()
+    t.getscreen().delay(0)
+    t.getscreen().tracer(0)
+    at = clock()
+    t.design(t.position(), 2)
+    et = clock()
+    return "runtime: %.2f sec." % (et-at)
+
+if __name__ == '__main__':
+    msg = main()
+    print(msg)
+    mainloop()

parrot/lib/python3.10/turtledemo/chaos.py

@@ -0,0 +1,59 @@
+# File: tdemo_chaos.py
+# Author: Gregor Lingl
+# Date: 2009-06-24
+
+# A demonstration of chaos
+
+from turtle import *
+
+N = 80
+
+def f(x):
+    return 3.9*x*(1-x)
+
+def g(x):
+    return 3.9*(x-x**2)
+
+def h(x):
+    return 3.9*x-3.9*x*x
+
+def jumpto(x, y):
+    penup(); goto(x,y)
+
+def line(x1, y1, x2, y2):
+    jumpto(x1, y1)
+    pendown()
+    goto(x2, y2)
+
+def coosys():
+    line(-1, 0, N+1, 0)
+    line(0, -0.1, 0, 1.1)
+
+def plot(fun, start, color):
+    pencolor(color)
+    x = start
+    jumpto(0, x)
+    pendown()
+    dot(5)
+    for i in range(N):
+        x=fun(x)
+        goto(i+1,x)
+        dot(5)
+
+def main():
+    reset()
+    setworldcoordinates(-1.0,-0.1, N+1, 1.1)
+    speed(0)
+    hideturtle()
+    coosys()
+    plot(f, 0.35, "blue")
+    plot(g, 0.35, "green")
+    plot(h, 0.35, "red")
+    # Now zoom in:
+    for s in range(100):
+        setworldcoordinates(0.5*s,-0.1, N+1, 1.1)
+    return "Done!"
+
+if __name__ == "__main__":
+    main()
+    mainloop()

parrot/lib/python3.10/turtledemo/clock.py

@@ -0,0 +1,131 @@
+#!/usr/bin/env python3
+# -*- coding: cp1252 -*-
+"""       turtle-example-suite:
+
+             tdemo_clock.py
+
+Enhanced clock-program, showing date
+and time
+  ------------------------------------
+   Press STOP to exit the program!
+  ------------------------------------
+"""
+from turtle import *
+from datetime import datetime
+
+def jump(distanz, winkel=0):
+    penup()
+    right(winkel)
+    forward(distanz)
+    left(winkel)
+    pendown()
+
+def hand(laenge, spitze):
+    fd(laenge*1.15)
+    rt(90)
+    fd(spitze/2.0)
+    lt(120)
+    fd(spitze)
+    lt(120)
+    fd(spitze)
+    lt(120)
+    fd(spitze/2.0)
+
+def make_hand_shape(name, laenge, spitze):
+    reset()
+    jump(-laenge*0.15)
+    begin_poly()
+    hand(laenge, spitze)
+    end_poly()
+    hand_form = get_poly()
+    register_shape(name, hand_form)
+
+def clockface(radius):
+    reset()
+    pensize(7)
+    for i in range(60):
+        jump(radius)
+        if i % 5 == 0:
+            fd(25)
+            jump(-radius-25)
+        else:
+            dot(3)
+            jump(-radius)
+        rt(6)
+
+def setup():
+    global second_hand, minute_hand, hour_hand, writer
+    mode("logo")
+    make_hand_shape("second_hand", 125, 25)
+    make_hand_shape("minute_hand",  130, 25)
+    make_hand_shape("hour_hand", 90, 25)
+    clockface(160)
+    second_hand = Turtle()
+    second_hand.shape("second_hand")
+    second_hand.color("gray20", "gray80")
+    minute_hand = Turtle()
+    minute_hand.shape("minute_hand")
+    minute_hand.color("blue1", "red1")
+    hour_hand = Turtle()
+    hour_hand.shape("hour_hand")
+    hour_hand.color("blue3", "red3")
+    for hand in second_hand, minute_hand, hour_hand:
+        hand.resizemode("user")
+        hand.shapesize(1, 1, 3)
+        hand.speed(0)
+    ht()
+    writer = Turtle()
+    #writer.mode("logo")
+    writer.ht()
+    writer.pu()
+    writer.bk(85)
+
+def wochentag(t):
+    wochentag = ["Monday", "Tuesday", "Wednesday",
+        "Thursday", "Friday", "Saturday", "Sunday"]
+    return wochentag[t.weekday()]
+
+def datum(z):
+    monat = ["Jan.", "Feb.", "Mar.", "Apr.", "May", "June",
+             "July", "Aug.", "Sep.", "Oct.", "Nov.", "Dec."]
+    j = z.year
+    m = monat[z.month - 1]
+    t = z.day
+    return "%s %d %d" % (m, t, j)
+
+def tick():
+    t = datetime.today()
+    sekunde = t.second + t.microsecond*0.000001
+    minute = t.minute + sekunde/60.0
+    stunde = t.hour + minute/60.0
+    try:
+        tracer(False)  # Terminator can occur here
+        writer.clear()
+        writer.home()
+        writer.forward(65)
+        writer.write(wochentag(t),
+                     align="center", font=("Courier", 14, "bold"))
+        writer.back(150)
+        writer.write(datum(t),
+                     align="center", font=("Courier", 14, "bold"))
+        writer.forward(85)
+        second_hand.setheading(6*sekunde)  # or here
+        minute_hand.setheading(6*minute)
+        hour_hand.setheading(30*stunde)
+        tracer(True)
+        ontimer(tick, 100)
+    except Terminator:
+        pass  # turtledemo user pressed STOP
+
+def main():
+    tracer(False)
+    setup()
+    tracer(True)
+    tick()
+    return "EVENTLOOP"
+
+if __name__ == "__main__":
+    mode("logo")
+    msg = main()
+    print(msg)
+    mainloop()

parrot/lib/python3.10/turtledemo/colormixer.py

@@ -0,0 +1,58 @@
+# colormixer
+
+from turtle import Screen, Turtle, mainloop
+
+class ColorTurtle(Turtle):
+
+    def __init__(self, x, y):
+        Turtle.__init__(self)
+        self.shape("turtle")
+        self.resizemode("user")
+        self.shapesize(3,3,5)
+        self.pensize(10)
+        self._color = [0,0,0]
+        self.x = x
+        self._color[x] = y
+        self.color(self._color)
+        self.speed(0)
+        self.left(90)
+        self.pu()
+        self.goto(x,0)
+        self.pd()
+        self.sety(1)
+        self.pu()
+        self.sety(y)
+        self.pencolor("gray25")
+        self.ondrag(self.shift)
+
+    def shift(self, x, y):
+        self.sety(max(0,min(y,1)))
+        self._color[self.x] = self.ycor()
+        self.fillcolor(self._color)
+        setbgcolor()
+
+def setbgcolor():
+    screen.bgcolor(red.ycor(), green.ycor(), blue.ycor())
+
+def main():
+    global screen, red, green, blue
+    screen = Screen()
+    screen.delay(0)
+    screen.setworldcoordinates(-1, -0.3, 3, 1.3)
+
+    red = ColorTurtle(0, .5)
+    green = ColorTurtle(1, .5)
+    blue = ColorTurtle(2, .5)
+    setbgcolor()
+
+    writer = Turtle()
+    writer.ht()
+    writer.pu()
+    writer.goto(1,1.15)
+    writer.write("DRAG!",align="center",font=("Arial",30,("bold","italic")))
+    return "EVENTLOOP"
+
+if __name__ == "__main__":
+    msg = main()
+    print(msg)
+    mainloop()

parrot/lib/python3.10/turtledemo/forest.py

@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+"""     turtlegraphics-example-suite:
+
+             tdemo_forest.py
+
+Displays a 'forest' of 3 breadth-first-trees
+similar to the one in tree.
+For further remarks see tree.py
+
+This example is a 'breadth-first'-rewrite of
+a Logo program written by Erich Neuwirth. See
+http://homepage.univie.ac.at/erich.neuwirth/
+"""
+from turtle import Turtle, colormode, tracer, mainloop
+from random import randrange
+from time import perf_counter as clock
+
+def symRandom(n):
+    return randrange(-n,n+1)
+
+def randomize( branchlist, angledist, sizedist ):
+    return [ (angle+symRandom(angledist),
+              sizefactor*1.01**symRandom(sizedist))
+                     for angle, sizefactor in branchlist ]
+
+def randomfd( t, distance, parts, angledist ):
+    for i in range(parts):
+        t.left(symRandom(angledist))
+        t.forward( (1.0 * distance)/parts )
+
+def tree(tlist, size, level, widthfactor, branchlists, angledist=10, sizedist=5):
+    # benutzt Liste von turtles und Liste von Zweiglisten,
+    # fuer jede turtle eine!
+    if level > 0:
+        lst = []
+        brs = []
+        for t, branchlist in list(zip(tlist,branchlists)):
+            t.pensize( size * widthfactor )
+            t.pencolor( 255 - (180 - 11 * level + symRandom(15)),
+                        180 - 11 * level + symRandom(15),
+                        0 )
+            t.pendown()
+            randomfd(t, size, level, angledist )
+            yield 1
+            for angle, sizefactor in branchlist:
+                t.left(angle)
+                lst.append(t.clone())
+                brs.append(randomize(branchlist, angledist, sizedist))
+                t.right(angle)
+        for x in tree(lst, size*sizefactor, level-1, widthfactor, brs,
+                      angledist, sizedist):
+            yield None
+
+
+def start(t,x,y):
+    colormode(255)
+    t.reset()
+    t.speed(0)
+    t.hideturtle()
+    t.left(90)
+    t.penup()
+    t.setpos(x,y)
+    t.pendown()
+
+def doit1(level, pen):
+    pen.hideturtle()
+    start(pen, 20, -208)
+    t = tree( [pen], 80, level, 0.1, [[ (45,0.69), (0,0.65), (-45,0.71) ]] )
+    return t
+
+def doit2(level, pen):
+    pen.hideturtle()
+    start(pen, -135, -130)
+    t = tree( [pen], 120, level, 0.1, [[ (45,0.69), (-45,0.71) ]] )
+    return t
+
+def doit3(level, pen):
+    pen.hideturtle()
+    start(pen, 190, -90)
+    t = tree( [pen], 100, level, 0.1, [[ (45,0.7), (0,0.72), (-45,0.65) ]] )
+    return t
+
+# Hier 3 Baumgeneratoren:
+def main():
+    p = Turtle()
+    p.ht()
+    tracer(75,0)
+    u = doit1(6, Turtle(undobuffersize=1))
+    s = doit2(7, Turtle(undobuffersize=1))
+    t = doit3(5, Turtle(undobuffersize=1))
+    a = clock()
+    while True:
+        done = 0
+        for b in u,s,t:
+            try:
+                b.__next__()
+            except:
+                done += 1
+        if done == 3:
+            break
+
+    tracer(1,10)
+    b = clock()
+    return "runtime: %.2f sec." % (b-a)
+
+if __name__ == '__main__':
+    main()
+    mainloop()

parrot/lib/python3.10/turtledemo/fractalcurves.py

@@ -0,0 +1,138 @@
+#!/usr/bin/env python3
+"""      turtle-example-suite:
+
+        tdemo_fractalCurves.py
+
+This program draws two fractal-curve-designs:
+(1) A hilbert curve (in a box)
+(2) A combination of Koch-curves.
+
+The CurvesTurtle class and the fractal-curve-
+methods are taken from the PythonCard example
+scripts for turtle-graphics.
+"""
+from turtle import *
+from time import sleep, perf_counter as clock
+
+class CurvesTurtle(Pen):
+    # example derived from
+    # Turtle Geometry: The Computer as a Medium for Exploring Mathematics
+    # by Harold Abelson and Andrea diSessa
+    # p. 96-98
+    def hilbert(self, size, level, parity):
+        if level == 0:
+            return
+        # rotate and draw first subcurve with opposite parity to big curve
+        self.left(parity * 90)
+        self.hilbert(size, level - 1, -parity)
+        # interface to and draw second subcurve with same parity as big curve
+        self.forward(size)
+        self.right(parity * 90)
+        self.hilbert(size, level - 1, parity)
+        # third subcurve
+        self.forward(size)
+        self.hilbert(size, level - 1, parity)
+        # fourth subcurve
+        self.right(parity * 90)
+        self.forward(size)
+        self.hilbert(size, level - 1, -parity)
+        # a final turn is needed to make the turtle
+        # end up facing outward from the large square
+        self.left(parity * 90)
+
+    # Visual Modeling with Logo: A Structural Approach to Seeing
+    # by James Clayson
+    # Koch curve, after Helge von Koch who introduced this geometric figure in 1904
+    # p. 146
+    def fractalgon(self, n, rad, lev, dir):
+        import math
+
+        # if dir = 1 turn outward
+        # if dir = -1 turn inward
+        edge = 2 * rad * math.sin(math.pi / n)
+        self.pu()
+        self.fd(rad)
+        self.pd()
+        self.rt(180 - (90 * (n - 2) / n))
+        for i in range(n):
+            self.fractal(edge, lev, dir)
+            self.rt(360 / n)
+        self.lt(180 - (90 * (n - 2) / n))
+        self.pu()
+        self.bk(rad)
+        self.pd()
+
+    # p. 146
+    def fractal(self, dist, depth, dir):
+        if depth < 1:
+            self.fd(dist)
+            return
+        self.fractal(dist / 3, depth - 1, dir)
+        self.lt(60 * dir)
+        self.fractal(dist / 3, depth - 1, dir)
+        self.rt(120 * dir)
+        self.fractal(dist / 3, depth - 1, dir)
+        self.lt(60 * dir)
+        self.fractal(dist / 3, depth - 1, dir)
+
+def main():
+    ft = CurvesTurtle()
+
+    ft.reset()
+    ft.speed(0)
+    ft.ht()
+    ft.getscreen().tracer(1,0)
+    ft.pu()
+
+    size = 6
+    ft.setpos(-33*size, -32*size)
+    ft.pd()
+
+    ta=clock()
+    ft.fillcolor("red")
+    ft.begin_fill()
+    ft.fd(size)
+
+    ft.hilbert(size, 6, 1)
+
+    # frame
+    ft.fd(size)
+    for i in range(3):
+        ft.lt(90)
+        ft.fd(size*(64+i%2))
+    ft.pu()
+    for i in range(2):
+        ft.fd(size)
+        ft.rt(90)
+    ft.pd()
+    for i in range(4):
+        ft.fd(size*(66+i%2))
+        ft.rt(90)
+    ft.end_fill()
+    tb=clock()
+    res =  "Hilbert: %.2fsec. " % (tb-ta)
+
+    sleep(3)
+
+    ft.reset()
+    ft.speed(0)
+    ft.ht()
+    ft.getscreen().tracer(1,0)
+
+    ta=clock()
+    ft.color("black", "blue")
+    ft.begin_fill()
+    ft.fractalgon(3, 250, 4, 1)
+    ft.end_fill()
+    ft.begin_fill()
+    ft.color("red")
+    ft.fractalgon(3, 200, 4, -1)
+    ft.end_fill()
+    tb=clock()
+    res +=  "Koch: %.2fsec." % (tb-ta)
+    return res
+
+if __name__  == '__main__':
+    msg = main()
+    print(msg)
+    mainloop()

parrot/lib/python3.10/turtledemo/lindenmayer.py

@@ -0,0 +1,119 @@
+#!/usr/bin/env python3
+"""       turtle-example-suite:
+
+        xtx_lindenmayer_indian.py
+
+Each morning women in Tamil Nadu, in southern
+India, place designs, created by using rice
+flour and known as kolam on the thresholds of
+their homes.
+
+These can be described by Lindenmayer systems,
+which can easily be implemented with turtle
+graphics and Python.
+
+Two examples are shown here:
+(1) the snake kolam
+(2) anklets of Krishna
+
+Taken from Marcia Ascher: Mathematics
+Elsewhere, An Exploration of Ideas Across
+Cultures
+
+"""
+################################
+# Mini Lindenmayer tool
+###############################
+
+from turtle import *
+
+def replace( seq, replacementRules, n ):
+    for i in range(n):
+        newseq = ""
+        for element in seq:
+            newseq = newseq + replacementRules.get(element,element)
+        seq = newseq
+    return seq
+
+def draw( commands, rules ):
+    for b in commands:
+        try:
+            rules[b]()
+        except TypeError:
+            try:
+                draw(rules[b], rules)
+            except:
+                pass
+
+
+def main():
+    ################################
+    # Example 1: Snake kolam
+    ################################
+
+
+    def r():
+        right(45)
+
+    def l():
+        left(45)
+
+    def f():
+        forward(7.5)
+
+    snake_rules = {"-":r, "+":l, "f":f, "b":"f+f+f--f--f+f+f"}
+    snake_replacementRules = {"b": "b+f+b--f--b+f+b"}
+    snake_start = "b--f--b--f"
+
+    drawing = replace(snake_start, snake_replacementRules, 3)
+
+    reset()
+    speed(3)
+    tracer(1,0)
+    ht()
+    up()
+    backward(195)
+    down()
+    draw(drawing, snake_rules)
+
+    from time import sleep
+    sleep(3)
+
+    ################################
+    # Example 2: Anklets of Krishna
+    ################################
+
+    def A():
+        color("red")
+        circle(10,90)
+
+    def B():
+        from math import sqrt
+        color("black")
+        l = 5/sqrt(2)
+        forward(l)
+        circle(l, 270)
+        forward(l)
+
+    def F():
+        color("green")
+        forward(10)
+
+    krishna_rules = {"a":A, "b":B, "f":F}
+    krishna_replacementRules = {"a" : "afbfa", "b" : "afbfbfbfa" }
+    krishna_start = "fbfbfbfb"
+
+    reset()
+    speed(0)
+    tracer(3,0)
+    ht()
+    left(45)
+    drawing = replace(krishna_start, krishna_replacementRules, 3)
+    draw(drawing, krishna_rules)
+    tracer(1)
+    return "Done!"
+
+if __name__=='__main__':
+    msg = main()
+    print(msg)
+    mainloop()

parrot/lib/python3.10/turtledemo/minimal_hanoi.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+"""       turtle-example-suite:
+
+         tdemo_minimal_hanoi.py
+
+A minimal 'Towers of Hanoi' animation:
+A tower of 6 discs is transferred from the
+left to the right peg.
+
+An imho quite elegant and concise
+implementation using a tower class, which
+is derived from the built-in type list.
+
+Discs are turtles with shape "square", but
+stretched to rectangles by shapesize()
+ ---------------------------------------
+       To exit press STOP button
+ ---------------------------------------
+"""
+from turtle import *
+
+class Disc(Turtle):
+    def __init__(self, n):
+        Turtle.__init__(self, shape="square", visible=False)
+        self.pu()
+        self.shapesize(1.5, n*1.5, 2) # square-->rectangle
+        self.fillcolor(n/6., 0, 1-n/6.)
+        self.st()
+
+class Tower(list):
+    "Hanoi tower, a subclass of built-in type list"
+    def __init__(self, x):
+        "create an empty tower. x is x-position of peg"
+        self.x = x
+    def push(self, d):
+        d.setx(self.x)
+        d.sety(-150+34*len(self))
+        self.append(d)
+    def pop(self):
+        d = list.pop(self)
+        d.sety(150)
+        return d
+
+def hanoi(n, from_, with_, to_):
+    if n > 0:
+        hanoi(n-1, from_, to_, with_)
+        to_.push(from_.pop())
+        hanoi(n-1, with_, from_, to_)
+
+def play():
+    onkey(None,"space")
+    clear()
+    try:
+        hanoi(6, t1, t2, t3)
+        write("press STOP button to exit",
+              align="center", font=("Courier", 16, "bold"))
+    except Terminator:
+        pass  # turtledemo user pressed STOP
+
+def main():
+    global t1, t2, t3
+    ht(); penup(); goto(0, -225)   # writer turtle
+    t1 = Tower(-250)
+    t2 = Tower(0)
+    t3 = Tower(250)
+    # make tower of 6 discs
+    for i in range(6,0,-1):
+        t1.push(Disc(i))
+    # prepare spartanic user interface ;-)
+    write("press spacebar to start game",
+          align="center", font=("Courier", 16, "bold"))
+    onkey(play, "space")
+    listen()
+    return "EVENTLOOP"
+
+if __name__=="__main__":
+    msg = main()
+    print(msg)
+    mainloop()

parrot/lib/python3.10/turtledemo/nim.py

@@ -0,0 +1,226 @@
+"""      turtle-example-suite:
+
+            tdemo_nim.py
+
+Play nim against the computer. The player
+who takes the last stick is the winner.
+
+Implements the model-view-controller
+design pattern.
+"""
+
+
+import turtle
+import random
+import time
+
+SCREENWIDTH = 640
+SCREENHEIGHT = 480
+
+MINSTICKS = 7
+MAXSTICKS = 31
+
+HUNIT = SCREENHEIGHT // 12
+WUNIT = SCREENWIDTH // ((MAXSTICKS // 5) * 11 + (MAXSTICKS % 5) * 2)
+
+SCOLOR = (63, 63, 31)
+HCOLOR = (255, 204, 204)
+COLOR = (204, 204, 255)
+
+def randomrow():
+    return random.randint(MINSTICKS, MAXSTICKS)
+
+def computerzug(state):
+    xored = state[0] ^ state[1] ^ state[2]
+    if xored == 0:
+        return randommove(state)
+    for z in range(3):
+        s = state[z] ^ xored
+        if s <= state[z]:
+            move = (z, s)
+            return move
+
+def randommove(state):
+    m = max(state)
+    while True:
+        z = random.randint(0,2)
+        if state[z] > (m > 1):
+            break
+    rand = random.randint(m > 1, state[z]-1)
+    return z, rand
+
+
+class NimModel(object):
+    def __init__(self, game):
+        self.game = game
+
+    def setup(self):
+        if self.game.state not in [Nim.CREATED, Nim.OVER]:
+            return
+        self.sticks = [randomrow(), randomrow(), randomrow()]
+        self.player = 0
+        self.winner = None
+        self.game.view.setup()
+        self.game.state = Nim.RUNNING
+
+    def move(self, row, col):
+        maxspalte = self.sticks[row]
+        self.sticks[row] = col
+        self.game.view.notify_move(row, col, maxspalte, self.player)
+        if self.game_over():
+            self.game.state = Nim.OVER
+            self.winner = self.player
+            self.game.view.notify_over()
+        elif self.player == 0:
+            self.player = 1
+            row, col = computerzug(self.sticks)
+            self.move(row, col)
+            self.player = 0
+
+    def game_over(self):
+        return self.sticks == [0, 0, 0]
+
+    def notify_move(self, row, col):
+        if self.sticks[row] <= col:
+            return
+        self.move(row, col)
+
+
+class Stick(turtle.Turtle):
+    def __init__(self, row, col, game):
+        turtle.Turtle.__init__(self, visible=False)
+        self.row = row
+        self.col = col
+        self.game = game
+        x, y = self.coords(row, col)
+        self.shape("square")
+        self.shapesize(HUNIT/10.0, WUNIT/20.0)
+        self.speed(0)
+        self.pu()
+        self.goto(x,y)
+        self.color("white")
+        self.showturtle()
+
+    def coords(self, row, col):
+        packet, remainder = divmod(col, 5)
+        x = (3 + 11 * packet + 2 * remainder) * WUNIT
+        y = (2 + 3 * row) * HUNIT
+        return x - SCREENWIDTH // 2 + WUNIT // 2, SCREENHEIGHT // 2 - y - HUNIT // 2
+
+    def makemove(self, x, y):
+        if self.game.state != Nim.RUNNING:
+            return
+        self.game.controller.notify_move(self.row, self.col)
+
+
+class NimView(object):
+    def __init__(self, game):
+        self.game = game
+        self.screen = game.screen
+        self.model = game.model
+        self.screen.colormode(255)
+        self.screen.tracer(False)
+        self.screen.bgcolor((240, 240, 255))
+        self.writer = turtle.Turtle(visible=False)
+        self.writer.pu()
+        self.writer.speed(0)
+        self.sticks = {}
+        for row in range(3):
+            for col in range(MAXSTICKS):
+                self.sticks[(row, col)] = Stick(row, col, game)
+        self.display("... a moment please ...")
+        self.screen.tracer(True)
+
+    def display(self, msg1, msg2=None):
+        self.screen.tracer(False)
+        self.writer.clear()
+        if msg2 is not None:
+            self.writer.goto(0, - SCREENHEIGHT // 2 + 48)
+            self.writer.pencolor("red")
+            self.writer.write(msg2, align="center", font=("Courier",18,"bold"))
+        self.writer.goto(0, - SCREENHEIGHT // 2 + 20)
+        self.writer.pencolor("black")
+        self.writer.write(msg1, align="center", font=("Courier",14,"bold"))
+        self.screen.tracer(True)
+
+    def setup(self):
+        self.screen.tracer(False)
+        for row in range(3):
+            for col in range(self.model.sticks[row]):
+                self.sticks[(row, col)].color(SCOLOR)
+        for row in range(3):
+            for col in range(self.model.sticks[row], MAXSTICKS):
+                self.sticks[(row, col)].color("white")
+        self.display("Your turn! Click leftmost stick to remove.")
+        self.screen.tracer(True)
+
+    def notify_move(self, row, col, maxspalte, player):
+        if player == 0:
+            farbe = HCOLOR
+            for s in range(col, maxspalte):
+                self.sticks[(row, s)].color(farbe)
+        else:
+            self.display(" ... thinking ...         ")
+            time.sleep(0.5)
+            self.display(" ... thinking ... aaah ...")
+            farbe = COLOR
+            for s in range(maxspalte-1, col-1, -1):
+                time.sleep(0.2)
+                self.sticks[(row, s)].color(farbe)
+            self.display("Your turn! Click leftmost stick to remove.")
+
+    def notify_over(self):
+        if self.game.model.winner == 0:
+            msg2 = "Congrats. You're the winner!!!"
+        else:
+            msg2 = "Sorry, the computer is the winner."
+        self.display("To play again press space bar. To leave press ESC.", msg2)
+
+    def clear(self):
+        if self.game.state == Nim.OVER:
+            self.screen.clear()
+
+
+class NimController(object):
+
+    def __init__(self, game):
+        self.game = game
+        self.sticks = game.view.sticks
+        self.BUSY = False
+        for stick in self.sticks.values():
+            stick.onclick(stick.makemove)
+        self.game.screen.onkey(self.game.model.setup, "space")
+        self.game.screen.onkey(self.game.view.clear, "Escape")
+        self.game.view.display("Press space bar to start game")
+        self.game.screen.listen()
+
+    def notify_move(self, row, col):
+        if self.BUSY:
+            return
+        self.BUSY = True
+        self.game.model.notify_move(row, col)
+        self.BUSY = False
+
+
+class Nim(object):
+    CREATED = 0
+    RUNNING = 1
+    OVER = 2
+    def __init__(self, screen):
+        self.state = Nim.CREATED
+        self.screen = screen
+        self.model = NimModel(self)
+        self.view = NimView(self)
+        self.controller = NimController(self)
+
+
+def main():
+    mainscreen = turtle.Screen()
+    mainscreen.mode("standard")
+    mainscreen.setup(SCREENWIDTH, SCREENHEIGHT)
+    nim = Nim(mainscreen)
+    return "EVENTLOOP"
+
+if __name__ == "__main__":
+    main()
+    turtle.mainloop()

parrot/lib/python3.10/turtledemo/paint.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+"""       turtle-example-suite:
+
+            tdemo_paint.py
+
+A simple  event-driven paint program
+
+- left mouse button moves turtle
+- middle mouse button changes color
+- right mouse button toggles between pen up
+(no line drawn when the turtle moves) and
+pen down (line is drawn). If pen up follows
+at least two pen-down moves, the polygon that
+includes the starting point is filled.
+ -------------------------------------------
+ Play around by clicking into the canvas
+ using all three mouse buttons.
+ -------------------------------------------
+          To exit press STOP button
+ -------------------------------------------
+"""
+from turtle import *
+
+def switchupdown(x=0, y=0):
+    if pen()["pendown"]:
+        end_fill()
+        up()
+    else:
+        down()
+        begin_fill()
+
+def changecolor(x=0, y=0):
+    global colors
+    colors = colors[1:]+colors[:1]
+    color(colors[0])
+
+def main():
+    global colors
+    shape("circle")
+    resizemode("user")
+    shapesize(.5)
+    width(3)
+    colors=["red", "green", "blue", "yellow"]
+    color(colors[0])
+    switchupdown()
+    onscreenclick(goto,1)
+    onscreenclick(changecolor,2)
+    onscreenclick(switchupdown,3)
+    return "EVENTLOOP"
+
+if __name__ == "__main__":
+    msg = main()
+    print(msg)
+    mainloop()

parrot/lib/python3.10/turtledemo/peace.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+"""       turtle-example-suite:
+
+              tdemo_peace.py
+
+A simple drawing suitable as a beginner's
+programming example. Aside from the
+peacecolors assignment and the for loop,
+it only uses turtle commands.
+"""
+
+from turtle import *
+
+def main():
+    peacecolors = ("red3",  "orange", "yellow",
+                   "seagreen4", "orchid4",
+                   "royalblue1", "dodgerblue4")
+
+    reset()
+    Screen()
+    up()
+    goto(-320,-195)
+    width(70)
+
+    for pcolor in peacecolors:
+        color(pcolor)
+        down()
+        forward(640)
+        up()
+        backward(640)
+        left(90)
+        forward(66)
+        right(90)
+
+    width(25)
+    color("white")
+    goto(0,-170)
+    down()
+
+    circle(170)
+    left(90)
+    forward(340)
+    up()
+    left(180)
+    forward(170)
+    right(45)
+    down()
+    forward(170)
+    up()
+    backward(170)
+    left(90)
+    down()
+    forward(170)
+    up()
+
+    goto(0,300) # vanish if hideturtle() is not available ;-)
+    return "Done!"
+
+if __name__ == "__main__":
+    main()
+    mainloop()

parrot/lib/python3.10/turtledemo/penrose.py

@@ -0,0 +1,175 @@
+#!/usr/bin/env python3
+"""       xturtle-example-suite:
+
+          xtx_kites_and_darts.py
+
+Constructs two aperiodic penrose-tilings,
+consisting of kites and darts, by the method
+of inflation in six steps.
+
+Starting points are the patterns "sun"
+consisting of five kites and "star"
+consisting of five darts.
+
+For more information see:
+ http://en.wikipedia.org/wiki/Penrose_tiling
+ -------------------------------------------
+"""
+from turtle import *
+from math import cos, pi
+from time import perf_counter as clock, sleep
+
+f = (5**0.5-1)/2.0   # (sqrt(5)-1)/2 -- golden ratio
+d = 2 * cos(3*pi/10)
+
+def kite(l):
+    fl = f * l
+    lt(36)
+    fd(l)
+    rt(108)
+    fd(fl)
+    rt(36)
+    fd(fl)
+    rt(108)
+    fd(l)
+    rt(144)
+
+def dart(l):
+    fl = f * l
+    lt(36)
+    fd(l)
+    rt(144)
+    fd(fl)
+    lt(36)
+    fd(fl)
+    rt(144)
+    fd(l)
+    rt(144)
+
+def inflatekite(l, n):
+    if n == 0:
+        px, py = pos()
+        h, x, y = int(heading()), round(px,3), round(py,3)
+        tiledict[(h,x,y)] = True
+        return
+    fl = f * l
+    lt(36)
+    inflatedart(fl, n-1)
+    fd(l)
+    rt(144)
+    inflatekite(fl, n-1)
+    lt(18)
+    fd(l*d)
+    rt(162)
+    inflatekite(fl, n-1)
+    lt(36)
+    fd(l)
+    rt(180)
+    inflatedart(fl, n-1)
+    lt(36)
+
+def inflatedart(l, n):
+    if n == 0:
+        px, py = pos()
+        h, x, y = int(heading()), round(px,3), round(py,3)
+        tiledict[(h,x,y)] = False
+        return
+    fl = f * l
+    inflatekite(fl, n-1)
+    lt(36)
+    fd(l)
+    rt(180)
+    inflatedart(fl, n-1)
+    lt(54)
+    fd(l*d)
+    rt(126)
+    inflatedart(fl, n-1)
+    fd(l)
+    rt(144)
+
+def draw(l, n, th=2):
+    clear()
+    l = l * f**n
+    shapesize(l/100.0, l/100.0, th)
+    for k in tiledict:
+        h, x, y = k
+        setpos(x, y)
+        setheading(h)
+        if tiledict[k]:
+            shape("kite")
+            color("black", (0, 0.75, 0))
+        else:
+            shape("dart")
+            color("black", (0.75, 0, 0))
+        stamp()
+
+def sun(l, n):
+    for i in range(5):
+        inflatekite(l, n)
+        lt(72)
+
+def star(l,n):
+    for i in range(5):
+        inflatedart(l, n)
+        lt(72)
+
+def makeshapes():
+    tracer(0)
+    begin_poly()
+    kite(100)
+    end_poly()
+    register_shape("kite", get_poly())
+    begin_poly()
+    dart(100)
+    end_poly()
+    register_shape("dart", get_poly())
+    tracer(1)
+
+def start():
+    reset()
+    ht()
+    pu()
+    makeshapes()
+    resizemode("user")
+
+def test(l=200, n=4, fun=sun, startpos=(0,0), th=2):
+    global tiledict
+    goto(startpos)
+    setheading(0)
+    tiledict = {}
+    tracer(0)
+    fun(l, n)
+    draw(l, n, th)
+    tracer(1)
+    nk = len([x for x in tiledict if tiledict[x]])
+    nd = len([x for x in tiledict if not tiledict[x]])
+    print("%d kites and %d darts = %d pieces." % (nk, nd, nk+nd))
+
+def demo(fun=sun):
+    start()
+    for i in range(8):
+        a = clock()
+        test(300, i, fun)
+        b = clock()
+        t = b - a
+        if t < 2:
+            sleep(2 - t)
+
+def main():
+    #title("Penrose-tiling with kites and darts.")
+    mode("logo")
+    bgcolor(0.3, 0.3, 0)
+    demo(sun)
+    sleep(2)
+    demo(star)
+    pencolor("black")
+    goto(0,-200)
+    pencolor(0.7,0.7,1)
+    write("Please wait...",
+          align="center", font=('Arial Black', 36, 'bold'))
+    test(600, 8, startpos=(70, 117))
+    return "Done"
+
+if __name__ == "__main__":
+    msg = main()
+    mainloop()

parrot/lib/python3.10/turtledemo/planet_and_moon.py

@@ -0,0 +1,111 @@
+#!/usr/bin/env python3
+"""       turtle-example-suite:
+
+        tdemo_planets_and_moon.py
+
+Gravitational system simulation using the
+approximation method from Feynman-lectures,
+p.9-8, using turtlegraphics.
+
+Example: heavy central body, light planet,
+very light moon!
+Planet has a circular orbit, moon a stable
+orbit around the planet.
+
+You can hold the movement temporarily by
+pressing the left mouse button with the
+mouse over the scrollbar of the canvas.
+
+"""
+from turtle import Shape, Turtle, mainloop, Vec2D as Vec
+
+G = 8
+
+class GravSys(object):
+    def __init__(self):
+        self.planets = []
+        self.t = 0
+        self.dt = 0.01
+    def init(self):
+        for p in self.planets:
+            p.init()
+    def start(self):
+        for i in range(10000):
+            self.t += self.dt
+            for p in self.planets:
+                p.step()
+
+class Star(Turtle):
+    def __init__(self, m, x, v, gravSys, shape):
+        Turtle.__init__(self, shape=shape)
+        self.penup()
+        self.m = m
+        self.setpos(x)
+        self.v = v
+        gravSys.planets.append(self)
+        self.gravSys = gravSys
+        self.resizemode("user")
+        self.pendown()
+    def init(self):
+        dt = self.gravSys.dt
+        self.a = self.acc()
+        self.v = self.v + 0.5*dt*self.a
+    def acc(self):
+        a = Vec(0,0)
+        for planet in self.gravSys.planets:
+            if planet != self:
+                v = planet.pos()-self.pos()
+                a += (G*planet.m/abs(v)**3)*v
+        return a
+    def step(self):
+        dt = self.gravSys.dt
+        self.setpos(self.pos() + dt*self.v)
+        if self.gravSys.planets.index(self) != 0:
+            self.setheading(self.towards(self.gravSys.planets[0]))
+        self.a = self.acc()
+        self.v = self.v + dt*self.a
+
+## create compound yellow/blue turtleshape for planets
+
+def main():
+    s = Turtle()
+    s.reset()
+    s.getscreen().tracer(0,0)
+    s.ht()
+    s.pu()
+    s.fd(6)
+    s.lt(90)
+    s.begin_poly()
+    s.circle(6, 180)
+    s.end_poly()
+    m1 = s.get_poly()
+    s.begin_poly()
+    s.circle(6,180)
+    s.end_poly()
+    m2 = s.get_poly()
+
+    planetshape = Shape("compound")
+    planetshape.addcomponent(m1,"orange")
+    planetshape.addcomponent(m2,"blue")
+    s.getscreen().register_shape("planet", planetshape)
+    s.getscreen().tracer(1,0)
+
+    ## setup gravitational system
+    gs = GravSys()
+    sun = Star(1000000, Vec(0,0), Vec(0,-2.5), gs, "circle")
+    sun.color("yellow")
+    sun.shapesize(1.8)
+    sun.pu()
+    earth = Star(12500, Vec(210,0), Vec(0,195), gs, "planet")
+    earth.pencolor("green")
+    earth.shapesize(0.8)
+    moon = Star(1, Vec(220,0), Vec(0,295), gs, "planet")
+    moon.pencolor("blue")
+    moon.shapesize(0.5)
+    gs.init()
+    gs.start()
+    return "Done!"
+
+if __name__ == '__main__':
+    main()
+    mainloop()

parrot/lib/python3.10/turtledemo/rosette.py

@@ -0,0 +1,65 @@
+"""      turtle-example-suite:
+
+          tdemo_wikipedia3.py
+
+This example is
+inspired by the Wikipedia article on turtle
+graphics. (See example wikipedia1 for URLs)
+
+First we create (ne-1) (i.e. 35 in this
+example) copies of our first turtle p.
+Then we let them perform their steps in
+parallel.
+
+Followed by a complete undo().
+"""
+from turtle import Screen, Turtle, mainloop
+from time import perf_counter as clock, sleep
+
+def mn_eck(p, ne,sz):
+    turtlelist = [p]
+    #create ne-1 additional turtles
+    for i in range(1,ne):
+        q = p.clone()
+        q.rt(360.0/ne)
+        turtlelist.append(q)
+        p = q
+    for i in range(ne):
+        c = abs(ne/2.0-i)/(ne*.7)
+        # let those ne turtles make a step
+        # in parallel:
+        for t in turtlelist:
+            t.rt(360./ne)
+            t.pencolor(1-c,0,c)
+            t.fd(sz)
+
+def main():
+    s = Screen()
+    s.bgcolor("black")
+    p=Turtle()
+    p.speed(0)
+    p.hideturtle()
+    p.pencolor("red")
+    p.pensize(3)
+
+    s.tracer(36,0)
+
+    at = clock()
+    mn_eck(p, 36, 19)
+    et = clock()
+    z1 = et-at
+
+    sleep(1)
+
+    at = clock()
+    while any(t.undobufferentries() for t in s.turtles()):
+        for t in s.turtles():
+            t.undo()
+    et = clock()
+    return "runtime: %.3f sec" % (z1+et-at)
+
+
+if __name__ == '__main__':
+    msg = main()
+    print(msg)
+    mainloop()

parrot/lib/python3.10/turtledemo/round_dance.py

@@ -0,0 +1,86 @@
+"""      turtle-example-suite:
+
+         tdemo_round_dance.py
+
+(Needs version 1.1 of the turtle module that
+comes with Python 3.1)
+
+Dancing turtles have a compound shape
+consisting of a series of triangles of
+decreasing size.
+
+Turtles march along a circle while rotating
+pairwise in opposite direction, with one
+exception. Does that breaking of symmetry
+enhance the attractiveness of the example?
+
+Press any key to stop the animation.
+
+Technically: demonstrates use of compound
+shapes, transformation of shapes as well as
+cloning turtles. The animation is
+controlled through update().
+"""
+
+from turtle import *
+
+def stop():
+    global running
+    running = False
+
+def main():
+    global running
+    clearscreen()
+    bgcolor("gray10")
+    tracer(False)
+    shape("triangle")
+    f =   0.793402
+    phi = 9.064678
+    s = 5
+    c = 1
+    # create compound shape
+    sh = Shape("compound")
+    for i in range(10):
+        shapesize(s)
+        p =get_shapepoly()
+        s *= f
+        c *= f
+        tilt(-phi)
+        sh.addcomponent(p, (c, 0.25, 1-c), "black")
+    register_shape("multitri", sh)
+    # create dancers
+    shapesize(1)
+    shape("multitri")
+    pu()
+    setpos(0, -200)
+    dancers = []
+    for i in range(180):
+        fd(7)
+        tilt(-4)
+        lt(2)
+        update()
+        if i % 12 == 0:
+            dancers.append(clone())
+    home()
+    # dance
+    running = True
+    onkeypress(stop)
+    listen()
+    cs = 1
+    while running:
+        ta = -4
+        for dancer in dancers:
+            dancer.fd(7)
+            dancer.lt(2)
+            dancer.tilt(ta)
+            ta = -4 if ta > 0 else 2
+        if cs < 180:
+            right(4)
+            shapesize(cs)
+            cs *= 1.005
+        update()
+    return "DONE!"
+
+if __name__=='__main__':
+    print(main())
+    mainloop()

parrot/lib/python3.10/turtledemo/sorting_animate.py

@@ -0,0 +1,204 @@
+#!/usr/bin/env python3
+"""
+
+         sorting_animation.py
+
+A minimal sorting algorithm animation:
+Sorts a shelf of 10 blocks using insertion
+sort, selection sort and quicksort.
+
+Shelfs are implemented using builtin lists.
+
+Blocks are turtles with shape "square", but
+stretched to rectangles by shapesize()
+ ---------------------------------------
+       To exit press space button
+ ---------------------------------------
+"""
+from turtle import *
+import random
+
+
+class Block(Turtle):
+
+    def __init__(self, size):
+        self.size = size
+        Turtle.__init__(self, shape="square", visible=False)
+        self.pu()
+        self.shapesize(size * 1.5, 1.5, 2) # square-->rectangle
+        self.fillcolor("black")
+        self.st()
+
+    def glow(self):
+        self.fillcolor("red")
+
+    def unglow(self):
+        self.fillcolor("black")
+
+    def __repr__(self):
+        return "Block size: {0}".format(self.size)
+
+
+class Shelf(list):
+
+    def __init__(self, y):
+        "create a shelf. y is y-position of first block"
+        self.y = y
+        self.x = -150
+
+    def push(self, d):
+        width, _, _ = d.shapesize()
+        # align blocks by the bottom edge
+        y_offset = width / 2 * 20
+        d.sety(self.y + y_offset)
+        d.setx(self.x + 34 * len(self))
+        self.append(d)
+
+    def _close_gap_from_i(self, i):
+        for b in self[i:]:
+            xpos, _ = b.pos()
+            b.setx(xpos - 34)
+
+    def _open_gap_from_i(self, i):
+        for b in self[i:]:
+            xpos, _ = b.pos()
+            b.setx(xpos + 34)
+
+    def pop(self, key):
+        b = list.pop(self, key)
+        b.glow()
+        b.sety(200)
+        self._close_gap_from_i(key)
+        return b
+
+    def insert(self, key, b):
+        self._open_gap_from_i(key)
+        list.insert(self, key, b)
+        b.setx(self.x + 34 * key)
+        width, _, _ = b.shapesize()
+        # align blocks by the bottom edge
+        y_offset = width / 2 * 20
+        b.sety(self.y + y_offset)
+        b.unglow()
+
+def isort(shelf):
+    length = len(shelf)
+    for i in range(1, length):
+        hole = i
+        while hole > 0 and shelf[i].size < shelf[hole - 1].size:
+            hole = hole - 1
+        shelf.insert(hole, shelf.pop(i))
+    return
+
+def ssort(shelf):
+    length = len(shelf)
+    for j in range(0, length - 1):
+        imin = j
+        for i in range(j + 1, length):
+            if shelf[i].size < shelf[imin].size:
+                imin = i
+        if imin != j:
+            shelf.insert(j, shelf.pop(imin))
+
+def partition(shelf, left, right, pivot_index):
+    pivot = shelf[pivot_index]
+    shelf.insert(right, shelf.pop(pivot_index))
+    store_index = left
+    for i in range(left, right): # range is non-inclusive of ending value
+        if shelf[i].size < pivot.size:
+            shelf.insert(store_index, shelf.pop(i))
+            store_index = store_index + 1
+    shelf.insert(store_index, shelf.pop(right)) # move pivot to correct position
+    return store_index
+
+def qsort(shelf, left, right):
+    if left < right:
+        pivot_index = left
+        pivot_new_index = partition(shelf, left, right, pivot_index)
+        qsort(shelf, left, pivot_new_index - 1)
+        qsort(shelf, pivot_new_index + 1, right)
+
+def randomize():
+    disable_keys()
+    clear()
+    target = list(range(10))
+    random.shuffle(target)
+    for i, t in enumerate(target):
+        for j in range(i, len(s)):
+            if s[j].size == t + 1:
+                s.insert(i, s.pop(j))
+    show_text(instructions1)
+    show_text(instructions2, line=1)
+    enable_keys()
+
+def show_text(text, line=0):
+    line = 20 * line
+    goto(0,-250 - line)
+    write(text, align="center", font=("Courier", 16, "bold"))
+
+def start_ssort():
+    disable_keys()
+    clear()
+    show_text("Selection Sort")
+    ssort(s)
+    clear()
+    show_text(instructions1)
+    show_text(instructions2, line=1)
+    enable_keys()
+
+def start_isort():
+    disable_keys()
+    clear()
+    show_text("Insertion Sort")
+    isort(s)
+    clear()
+    show_text(instructions1)
+    show_text(instructions2, line=1)
+    enable_keys()
+
+def start_qsort():
+    disable_keys()
+    clear()
+    show_text("Quicksort")
+    qsort(s, 0, len(s) - 1)
+    clear()
+    show_text(instructions1)
+    show_text(instructions2, line=1)
+    enable_keys()
+
+def init_shelf():
+    global s
+    s = Shelf(-200)
+    vals = (4, 2, 8, 9, 1, 5, 10, 3, 7, 6)
+    for i in vals:
+        s.push(Block(i))
+
+def disable_keys():
+    onkey(None, "s")
+    onkey(None, "i")
+    onkey(None, "q")
+    onkey(None, "r")
+
+def enable_keys():
+    onkey(start_isort, "i")
+    onkey(start_ssort, "s")
+    onkey(start_qsort, "q")
+    onkey(randomize, "r")
+    onkey(bye, "space")
+
+def main():
+    getscreen().clearscreen()
+    ht(); penup()
+    init_shelf()
+    show_text(instructions1)
+    show_text(instructions2, line=1)
+    enable_keys()
+    listen()
+    return "EVENTLOOP"
+
+instructions1 = "press i for insertion sort, s for selection sort, q for quicksort"
+instructions2 = "spacebar to quit, r to randomize"
+
+if __name__=="__main__":
+    msg = main()
+    mainloop()

parrot/lib/python3.10/turtledemo/tree.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+"""      turtle-example-suite:
+
+             tdemo_tree.py
+
+Displays a 'breadth-first-tree' - in contrast
+to the classical Logo tree drawing programs,
+which use a depth-first-algorithm.
+
+Uses:
+(1) a tree-generator, where the drawing is
+quasi the side-effect, whereas the generator
+always yields None.
+(2) Turtle-cloning: At each branching point
+the current pen is cloned. So in the end
+there are 1024 turtles.
+"""
+from turtle import Turtle, mainloop
+from time import perf_counter as clock
+
+def tree(plist, l, a, f):
+    """ plist is list of pens
+    l is length of branch
+    a is half of the angle between 2 branches
+    f is factor by which branch is shortened
+    from level to level."""
+    if l > 3:
+        lst = []
+        for p in plist:
+            p.forward(l)
+            q = p.clone()
+            p.left(a)
+            q.right(a)
+            lst.append(p)
+            lst.append(q)
+        for x in tree(lst, l*f, a, f):
+            yield None
+
+def maketree():
+    p = Turtle()
+    p.setundobuffer(None)
+    p.hideturtle()
+    p.speed(0)
+    p.getscreen().tracer(30,0)
+    p.left(90)
+    p.penup()
+    p.forward(-210)
+    p.pendown()
+    t = tree([p], 200, 65, 0.6375)
+    for x in t:
+        pass
+
+def main():
+    a=clock()
+    maketree()
+    b=clock()
+    return "done: %.2f sec." % (b-a)
+
+if __name__ == "__main__":
+    msg = main()
+    print(msg)
+    mainloop()

parrot/lib/python3.10/turtledemo/turtle.cfg

@@ -0,0 +1,10 @@
+width = 800
+height = 600
+canvwidth = 1200
+canvheight = 900
+shape = arrow
+mode = standard
+resizemode = auto
+fillcolor = ""
+title = Python turtle graphics demo.
+

parrot/lib/python3.10/turtledemo/two_canvases.py

@@ -0,0 +1,54 @@
+"""turtledemo.two_canvases
+
+Use TurtleScreen and RawTurtle to draw on two
+distinct canvases in a separate window. The
+new window must be separately closed in
+addition to pressing the STOP button.
+"""
+
+from turtle import TurtleScreen, RawTurtle, TK
+
+def main():
+    root = TK.Tk()
+    cv1 = TK.Canvas(root, width=300, height=200, bg="#ddffff")
+    cv2 = TK.Canvas(root, width=300, height=200, bg="#ffeeee")
+    cv1.pack()
+    cv2.pack()
+
+    s1 = TurtleScreen(cv1)
+    s1.bgcolor(0.85, 0.85, 1)
+    s2 = TurtleScreen(cv2)
+    s2.bgcolor(1, 0.85, 0.85)
+
+    p = RawTurtle(s1)
+    q = RawTurtle(s2)
+
+    p.color("red", (1, 0.85, 0.85))
+    p.width(3)
+    q.color("blue", (0.85, 0.85, 1))
+    q.width(3)
+
+    for t in p,q:
+        t.shape("turtle")
+        t.lt(36)
+
+    q.lt(180)
+
+    for t in p, q:
+        t.begin_fill()
+    for i in range(5):
+        for t in p, q:
+            t.fd(50)
+            t.lt(72)
+    for t in p,q:
+        t.end_fill()
+        t.lt(54)
+        t.pu()
+        t.bk(50)
+
+    return "EVENTLOOP"
+
+
+if __name__ == '__main__':
+    main()
+    TK.mainloop()  # keep window open until user closes it

parrot/lib/python3.10/turtledemo/yinyang.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+"""       turtle-example-suite:
+
+            tdemo_yinyang.py
+
+Another drawing suitable as a beginner's
+programming example.
+
+The small circles are drawn by the circle
+command.
+
+"""
+
+from turtle import *
+
+def yin(radius, color1, color2):
+    width(3)
+    color("black", color1)
+    begin_fill()
+    circle(radius/2., 180)
+    circle(radius, 180)
+    left(180)
+    circle(-radius/2., 180)
+    end_fill()
+    left(90)
+    up()
+    forward(radius*0.35)
+    right(90)
+    down()
+    color(color1, color2)
+    begin_fill()
+    circle(radius*0.15)
+    end_fill()
+    left(90)
+    up()
+    backward(radius*0.35)
+    down()
+    left(90)
+
+def main():
+    reset()
+    yin(200, "black", "white")
+    yin(200, "white", "black")
+    ht()
+    return "Done!"
+
+if __name__ == '__main__':
+    main()
+    mainloop()