INSTRUCTION stringlengths 1 46.3k | RESPONSE stringlengths 75 80.2k |
|---|---|
Parse the sourcecode and return the abstract syntax tree. This
tree of nodes is used by the compiler to convert the template into
executable source- or bytecode. This is useful for debugging or to
extract information from templates.
If you are :ref:`developing Jinja2 extensions <writi... | def parse(self, source, name=None, filename=None):
"""Parse the sourcecode and return the abstract syntax tree. This
tree of nodes is used by the compiler to convert the template into
executable source- or bytecode. This is useful for debugging or to
extract information from templates.... |
Internal parsing function used by `parse` and `compile`. | def _parse(self, source, name, filename):
"""Internal parsing function used by `parse` and `compile`."""
return Parser(self, source, name, encode_filename(filename)).parse() |
Lex the given sourcecode and return a generator that yields
tokens as tuples in the form ``(lineno, token_type, value)``.
This can be useful for :ref:`extension development <writing-extensions>`
and debugging templates.
This does not perform preprocessing. If you want the preprocessing... | def lex(self, source, name=None, filename=None):
"""Lex the given sourcecode and return a generator that yields
tokens as tuples in the form ``(lineno, token_type, value)``.
This can be useful for :ref:`extension development <writing-extensions>`
and debugging templates.
This do... |
Called by the parser to do the preprocessing and filtering
for all the extensions. Returns a :class:`~jinja2.lexer.TokenStream`. | def _tokenize(self, source, name, filename=None, state=None):
"""Called by the parser to do the preprocessing and filtering
for all the extensions. Returns a :class:`~jinja2.lexer.TokenStream`.
"""
source = self.preprocess(source, name, filename)
stream = self.lexer.tokenize(sou... |
Compile a node or template source code. The `name` parameter is
the load name of the template after it was joined using
:meth:`join_path` if necessary, not the filename on the file system.
the `filename` parameter is the estimated filename of the template on
the file system. If the tem... | def compile(self, source, name=None, filename=None, raw=False,
defer_init=False):
"""Compile a node or template source code. The `name` parameter is
the load name of the template after it was joined using
:meth:`join_path` if necessary, not the filename on the file system.
... |
A handy helper method that returns a callable that accepts keyword
arguments that appear as variables in the expression. If called it
returns the result of the expression.
This is useful if applications want to use the same rules as Jinja
in template "configuration files" or similar si... | def compile_expression(self, source, undefined_to_none=True):
"""A handy helper method that returns a callable that accepts keyword
arguments that appear as variables in the expression. If called it
returns the result of the expression.
This is useful if applications want to use the sa... |
Load a template from the loader. If a loader is configured this
method asks the loader for the template and returns a :class:`Template`.
If the `parent` parameter is not `None`, :meth:`join_path` is called
to get the real template name before loading.
The `globals` parameter can be use... | def get_template(self, name, parent=None, globals=None):
"""Load a template from the loader. If a loader is configured this
method asks the loader for the template and returns a :class:`Template`.
If the `parent` parameter is not `None`, :meth:`join_path` is called
to get the real templ... |
Works like :meth:`get_template` but tries a number of templates
before it fails. If it cannot find any of the templates, it will
raise a :exc:`TemplatesNotFound` exception.
.. versionadded:: 2.3
.. versionchanged:: 2.4
If `names` contains a :class:`Template` object it is re... | def select_template(self, names, parent=None, globals=None):
"""Works like :meth:`get_template` but tries a number of templates
before it fails. If it cannot find any of the templates, it will
raise a :exc:`TemplatesNotFound` exception.
.. versionadded:: 2.3
.. versionchanged:... |
Does a typecheck and dispatches to :meth:`select_template`
if an iterable of template names is given, otherwise to
:meth:`get_template`.
.. versionadded:: 2.3 | def get_or_select_template(self, template_name_or_list,
parent=None, globals=None):
"""Does a typecheck and dispatches to :meth:`select_template`
if an iterable of template names is given, otherwise to
:meth:`get_template`.
.. versionadded:: 2.3
""... |
Load a template from a string. This parses the source given and
returns a :class:`Template` object. | def from_string(self, source, globals=None, template_class=None):
"""Load a template from a string. This parses the source given and
returns a :class:`Template` object.
"""
globals = self.make_globals(globals)
cls = template_class or self.template_class
return cls.from_c... |
Return a dict for the globals. | def make_globals(self, d):
"""Return a dict for the globals."""
if not d:
return self.globals
return dict(self.globals, **d) |
Creates a template object from a module. This is used by the
module loader to create a template object.
.. versionadded:: 2.4 | def from_module_dict(cls, environment, module_dict, globals):
"""Creates a template object from a module. This is used by the
module loader to create a template object.
.. versionadded:: 2.4
"""
return cls._from_namespace(environment, module_dict, globals) |
Create a new :class:`Context` for this template. The vars
provided will be passed to the template. Per default the globals
are added to the context. If shared is set to `True` the data
is passed as it to the context without adding the globals.
`locals` can be a dict of local variable... | def new_context(self, vars=None, shared=False, locals=None):
"""Create a new :class:`Context` for this template. The vars
provided will be passed to the template. Per default the globals
are added to the context. If shared is set to `True` the data
is passed as it to the context witho... |
This method works like the :attr:`module` attribute when called
without arguments but it will evaluate the template on every call
rather than caching it. It's also possible to provide
a dict which is then used as context. The arguments are the same
as for the :meth:`new_context` method... | def make_module(self, vars=None, shared=False, locals=None):
"""This method works like the :attr:`module` attribute when called
without arguments but it will evaluate the template on every call
rather than caching it. It's also possible to provide
a dict which is then used as context. ... |
Return the source line number of a line number in the
generated bytecode as they are not in sync. | def get_corresponding_lineno(self, lineno):
"""Return the source line number of a line number in the
generated bytecode as they are not in sync.
"""
for template_line, code_line in reversed(self.debug_info):
if code_line <= lineno:
return template_line
... |
The debug info mapping. | def debug_info(self):
"""The debug info mapping."""
return [tuple(imap(int, x.split('='))) for x in
self._debug_info.split('&')] |
This is a stand-in function for `urllib3.util.parse_url`
The orignal function doesn't handle special characters very well, this simply splits
out the authentication section, creates the parsed url, then puts the authentication
section back in, bypassing validation.
:return: The new, parsed URL object
... | def _get_parsed_url(url):
# type: (S) -> Url
"""
This is a stand-in function for `urllib3.util.parse_url`
The orignal function doesn't handle special characters very well, this simply splits
out the authentication section, creates the parsed url, then puts the authentication
section back in, by... |
Given a url, remove the password and insert 4 dashes
:param url: The url to replace the authentication in
:type url: S
:return: The new URL without authentication
:rtype: S | def remove_password_from_url(url):
# type: (S) -> S
"""
Given a url, remove the password and insert 4 dashes
:param url: The url to replace the authentication in
:type url: S
:return: The new URL without authentication
:rtype: S
"""
parsed = _get_parsed_url(url)
if parsed.auth:... |
Ensures that the environment is good for unicode on Python 3. | def _verify_python3_env():
"""Ensures that the environment is good for unicode on Python 3."""
if PY2:
return
try:
import locale
fs_enc = codecs.lookup(locale.getpreferredencoding()).name
except Exception:
fs_enc = 'ascii'
if fs_enc != 'ascii':
return
ext... |
On Windows, the files in .svn are read-only, so when rmtree() tries to
remove them, an exception is thrown. We catch that here, remove the
read-only attribute, and hopefully continue without problems. | def rmtree_errorhandler(func, path, exc_info):
"""On Windows, the files in .svn are read-only, so when rmtree() tries to
remove them, an exception is thrown. We catch that here, remove the
read-only attribute, and hopefully continue without problems."""
# if file type currently read only
if os.stat... |
Gives the display value for a given path, making it relative to cwd
if possible. | def display_path(path):
# type: (Union[str, Text]) -> str
"""Gives the display value for a given path, making it relative to cwd
if possible."""
path = os.path.normcase(os.path.abspath(path))
if sys.version_info[0] == 2:
path = path.decode(sys.getfilesystemencoding(), 'replace')
path... |
Is path is a directory containing setup.py or pyproject.toml? | def is_installable_dir(path):
# type: (str) -> bool
"""Is path is a directory containing setup.py or pyproject.toml?
"""
if not os.path.isdir(path):
return False
setup_py = os.path.join(path, 'setup.py')
if os.path.isfile(setup_py):
return True
pyproject_toml = os.path.join(p... |
Returns true if the page appears to be the index page of an svn repository | def is_svn_page(html):
# type: (Union[str, Text]) -> Optional[Match[Union[str, Text]]]
"""
Returns true if the page appears to be the index page of an svn repository
"""
return (re.search(r'<title>[^<]*Revision \d+:', html) and
re.search(r'Powered by (?:<a[^>]*?>)?Subversion', html, re.I... |
Yield pieces of data from a file-like object until EOF. | def read_chunks(file, size=io.DEFAULT_BUFFER_SIZE):
"""Yield pieces of data from a file-like object until EOF."""
while True:
chunk = file.read(size)
if not chunk:
break
yield chunk |
Convert a path to its canonical, case-normalized, absolute version. | def normalize_path(path, resolve_symlinks=True):
# type: (str, bool) -> str
"""
Convert a path to its canonical, case-normalized, absolute version.
"""
path = expanduser(path)
if resolve_symlinks:
path = os.path.realpath(path)
else:
path = os.path.abspath(path)
return os... |
Like os.path.splitext, but take off .tar too | def splitext(path):
# type: (str) -> Tuple[str, str]
"""Like os.path.splitext, but take off .tar too"""
base, ext = posixpath.splitext(path)
if base.lower().endswith('.tar'):
ext = base[-4:] + ext
base = base[:-4]
return base, ext |
Like os.renames(), but handles renaming across devices. | def renames(old, new):
# type: (str, str) -> None
"""Like os.renames(), but handles renaming across devices."""
# Implementation borrowed from os.renames().
head, tail = os.path.split(new)
if head and tail and not os.path.exists(head):
os.makedirs(head)
shutil.move(old, new)
head, ... |
Return True if path is within sys.prefix, if we're running in a virtualenv.
If we're not in a virtualenv, all paths are considered "local." | def is_local(path):
# type: (str) -> bool
"""
Return True if path is within sys.prefix, if we're running in a virtualenv.
If we're not in a virtualenv, all paths are considered "local."
"""
if not running_under_virtualenv():
return True
return normalize_path(path).startswith(normal... |
Return True if given Distribution is an editable install. | def dist_is_editable(dist):
# type: (Distribution) -> bool
"""
Return True if given Distribution is an editable install.
"""
for path_item in sys.path:
egg_link = os.path.join(path_item, dist.project_name + '.egg-link')
if os.path.isfile(egg_link):
return True
return ... |
Return a list of installed Distribution objects.
If ``local_only`` is True (default), only return installations
local to the current virtualenv, if in a virtualenv.
``skip`` argument is an iterable of lower-case project names to
ignore; defaults to stdlib_pkgs
If ``include_editables`` is False, d... | def get_installed_distributions(local_only=True,
skip=stdlib_pkgs,
include_editables=True,
editables_only=False,
user_only=False):
# type: (bool, Container[str], bool, bool, bool) -> List[... |
Return the path for the .egg-link file if it exists, otherwise, None.
There's 3 scenarios:
1) not in a virtualenv
try to find in site.USER_SITE, then site_packages
2) in a no-global virtualenv
try to find in site_packages
3) in a yes-global virtualenv
try to find in site_packages, ... | def egg_link_path(dist):
# type: (Distribution) -> Optional[str]
"""
Return the path for the .egg-link file if it exists, otherwise, None.
There's 3 scenarios:
1) not in a virtualenv
try to find in site.USER_SITE, then site_packages
2) in a no-global virtualenv
try to find in site... |
Unzip the file (with path `filename`) to the destination `location`. All
files are written based on system defaults and umask (i.e. permissions are
not preserved), except that regular file members with any execute
permissions (user, group, or world) have "chmod +x" applied after being
written. Note tha... | def unzip_file(filename, location, flatten=True):
# type: (str, str, bool) -> None
"""
Unzip the file (with path `filename`) to the destination `location`. All
files are written based on system defaults and umask (i.e. permissions are
not preserved), except that regular file members with any execut... |
Args:
extra_ok_returncodes: an iterable of integer return codes that are
acceptable, in addition to 0. Defaults to None, which means [].
unset_environ: an iterable of environment variable names to unset
prior to calling subprocess.Popen(). | def call_subprocess(
cmd, # type: List[str]
show_stdout=True, # type: bool
cwd=None, # type: Optional[str]
on_returncode='raise', # type: str
extra_ok_returncodes=None, # type: Optional[Iterable[int]]
command_desc=None, # type: Optional[str]
extra_environ=None, # type: Optional[Mappin... |
Return the contents of *filename*.
Try to decode the file contents with utf-8, the preferred system encoding
(e.g., cp1252 on some Windows machines), and latin1, in that order.
Decoding a byte string with latin1 will never raise an error. In the worst
case, the returned string will contain some garbage... | def read_text_file(filename):
# type: (str) -> str
"""Return the contents of *filename*.
Try to decode the file contents with utf-8, the preferred system encoding
(e.g., cp1252 on some Windows machines), and latin1, in that order.
Decoding a byte string with latin1 will never raise an error. In the... |
Return a context manager used by captured_stdout/stdin/stderr
that temporarily replaces the sys stream *stream_name* with a StringIO.
Taken from Lib/support/__init__.py in the CPython repo. | def captured_output(stream_name):
"""Return a context manager used by captured_stdout/stdin/stderr
that temporarily replaces the sys stream *stream_name* with a StringIO.
Taken from Lib/support/__init__.py in the CPython repo.
"""
orig_stdout = getattr(sys, stream_name)
setattr(sys, stream_name... |
Get the installed version of dist_name avoiding pkg_resources cache | def get_installed_version(dist_name, working_set=None):
"""Get the installed version of dist_name avoiding pkg_resources cache"""
# Create a requirement that we'll look for inside of setuptools.
req = pkg_resources.Requirement.parse(dist_name)
if working_set is None:
# We want to avoid having t... |
Return the URL for a VCS requirement.
Args:
repo_url: the remote VCS url, with any needed VCS prefix (e.g. "git+").
project_name: the (unescaped) project name. | def make_vcs_requirement_url(repo_url, rev, project_name, subdir=None):
"""
Return the URL for a VCS requirement.
Args:
repo_url: the remote VCS url, with any needed VCS prefix (e.g. "git+").
project_name: the (unescaped) project name.
"""
egg_project_name = pkg_resources.to_filename(pr... |
Parse out and remove the auth information from a netloc.
Returns: (netloc, (username, password)). | def split_auth_from_netloc(netloc):
"""
Parse out and remove the auth information from a netloc.
Returns: (netloc, (username, password)).
"""
if '@' not in netloc:
return netloc, (None, None)
# Split from the right because that's how urllib.parse.urlsplit()
# behaves if more than o... |
Replace the password in a netloc with "****", if it exists.
For example, "user:pass@example.com" returns "user:****@example.com". | def redact_netloc(netloc):
# type: (str) -> str
"""
Replace the password in a netloc with "****", if it exists.
For example, "user:pass@example.com" returns "user:****@example.com".
"""
netloc, (user, password) = split_auth_from_netloc(netloc)
if user is None:
return netloc
pass... |
Protection of pip.exe from modification on Windows
On Windows, any operation modifying pip should be run as:
python -m pip ... | def protect_pip_from_modification_on_windows(modifying_pip):
"""Protection of pip.exe from modification on Windows
On Windows, any operation modifying pip should be run as:
python -m pip ...
"""
pip_names = [
"pip.exe",
"pip{}.exe".format(sys.version_info[0]),
"pip{}.{}.... |
Check if the python version in use match the `requires_python` specifier.
Returns `True` if the version of python in use matches the requirement.
Returns `False` if the version of python in use does not matches the
requirement.
Raises an InvalidSpecifier if `requires_python` have an invalid format. | def check_requires_python(requires_python):
# type: (Optional[str]) -> bool
"""
Check if the python version in use match the `requires_python` specifier.
Returns `True` if the version of python in use matches the requirement.
Returns `False` if the version of python in use does not matches the
... |
Initialize the enhanced click completion
Parameters
----------
complete_options : bool
always complete the options, even when the user hasn't typed a first dash (Default value = False)
match_incomplete : func
a function with two parameters choice and incomplete. Must return True
... | def init(complete_options=False, match_incomplete=None):
"""Initialize the enhanced click completion
Parameters
----------
complete_options : bool
always complete the options, even when the user hasn't typed a first dash (Default value = False)
match_incomplete : func
a function wit... |
The list from pypi is really a list of versions. We want a list of
packages with the list of versions stored inline. This converts the
list from pypi into one we can use. | def transform_hits(hits):
"""
The list from pypi is really a list of versions. We want a list of
packages with the list of versions stored inline. This converts the
list from pypi into one we can use.
"""
packages = OrderedDict()
for hit in hits:
name = hit['name']
summary = ... |
Add install_req as a requirement to install.
:param parent_req_name: The name of the requirement that needed this
added. The name is used because when multiple unnamed requirements
resolve to the same name, we could otherwise end up with dependency
links that point outside t... | def add_requirement(
self,
install_req, # type: InstallRequirement
parent_req_name=None, # type: Optional[str]
extras_requested=None # type: Optional[Iterable[str]]
):
# type: (...) -> Tuple[List[InstallRequirement], Optional[InstallRequirement]] # noqa: E501
"""A... |
Resolve what operations need to be done
As a side-effect of this method, the packages (and their dependencies)
are downloaded, unpacked and prepared for installation. This
preparation is done by ``pip.operations.prepare``.
Once PyPI has static dependency metadata available, it would be... | def resolve(self, requirement_set):
# type: (RequirementSet) -> None
"""Resolve what operations need to be done
As a side-effect of this method, the packages (and their dependencies)
are downloaded, unpacked and prepared for installation. This
preparation is done by ``pip.operat... |
Set a requirement to be installed. | def _set_req_to_reinstall(self, req):
# type: (InstallRequirement) -> None
"""
Set a requirement to be installed.
"""
# Don't uninstall the conflict if doing a user install and the
# conflict is not a user install.
if not self.use_user_site or dist_in_usersite(req... |
Check if req_to_install should be skipped.
This will check if the req is installed, and whether we should upgrade
or reinstall it, taking into account all the relevant user options.
After calling this req_to_install will only have satisfied_by set to
None if the req_to_install is to be... | def _check_skip_installed(self, req_to_install):
# type: (InstallRequirement) -> Optional[str]
"""Check if req_to_install should be skipped.
This will check if the req is installed, and whether we should upgrade
or reinstall it, taking into account all the relevant user options.
... |
Takes a InstallRequirement and returns a single AbstractDist \
representing a prepared variant of the same. | def _get_abstract_dist_for(self, req):
# type: (InstallRequirement) -> DistAbstraction
"""Takes a InstallRequirement and returns a single AbstractDist \
representing a prepared variant of the same.
"""
assert self.require_hashes is not None, (
"require_hashes should h... |
Prepare a single requirements file.
:return: A list of additional InstallRequirements to also install. | def _resolve_one(
self,
requirement_set, # type: RequirementSet
req_to_install, # type: InstallRequirement
ignore_requires_python=False # type: bool
):
# type: (...) -> List[InstallRequirement]
"""Prepare a single requirements file.
:return: A list of addi... |
Create the installation order.
The installation order is topological - requirements are installed
before the requiring thing. We break cycles at an arbitrary point,
and make no other guarantees. | def get_installation_order(self, req_set):
# type: (RequirementSet) -> List[InstallRequirement]
"""Create the installation order.
The installation order is topological - requirements are installed
before the requiring thing. We break cycles at an arbitrary point,
and make no oth... |
Escape &, <, >, ", ', etc. in a string of data. | def _xml_escape(data):
"""Escape &, <, >, ", ', etc. in a string of data."""
# ampersand must be replaced first
from_symbols = '&><"\''
to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split())
for from_,to_ in zip(from_symbols, to_symbols):
data = data.replace(from_, to_)
return ... |
Returns the line of text containing loc within a string, counting newlines as line separators. | def line( loc, strg ):
"""Returns the line of text containing loc within a string, counting newlines as line separators.
"""
lastCR = strg.rfind("\n", 0, loc)
nextCR = strg.find("\n", loc)
if nextCR >= 0:
return strg[lastCR+1:nextCR]
else:
return strg[lastCR+1:] |
Decorator for debugging parse actions.
When the parse action is called, this decorator will print
``">> entering method-name(line:<current_source_line>, <parse_location>, <matched_tokens>)"``.
When the parse action completes, the decorator will print
``"<<"`` followed by the returned value, or any exce... | def traceParseAction(f):
"""Decorator for debugging parse actions.
When the parse action is called, this decorator will print
``">> entering method-name(line:<current_source_line>, <parse_location>, <matched_tokens>)"``.
When the parse action completes, the decorator will print
``"<<"`` followed by... |
Helper to define a delimited list of expressions - the delimiter
defaults to ','. By default, the list elements and delimiters can
have intervening whitespace, and comments, but this can be
overridden by passing ``combine=True`` in the constructor. If
``combine`` is set to ``True``, the matching tokens ... | def delimitedList( expr, delim=",", combine=False ):
"""Helper to define a delimited list of expressions - the delimiter
defaults to ','. By default, the list elements and delimiters can
have intervening whitespace, and comments, but this can be
overridden by passing ``combine=True`` in the constructor.... |
Helper to return the original, untokenized text for a given
expression. Useful to restore the parsed fields of an HTML start
tag into the raw tag text itself, or to revert separate tokens with
intervening whitespace back to the original matching input text. By
default, returns astring containing the or... | def originalTextFor(expr, asString=True):
"""Helper to return the original, untokenized text for a given
expression. Useful to restore the parsed fields of an HTML start
tag into the raw tag text itself, or to revert separate tokens with
intervening whitespace back to the original matching input text. ... |
Helper to decorate a returned token with its starting and ending
locations in the input string.
This helper adds the following results names:
- locn_start = location where matched expression begins
- locn_end = location where matched expression ends
- value = the actual parsed results
Be c... | def locatedExpr(expr):
"""Helper to decorate a returned token with its starting and ending
locations in the input string.
This helper adds the following results names:
- locn_start = location where matched expression begins
- locn_end = location where matched expression ends
- value = the a... |
r"""Helper to easily define string ranges for use in Word
construction. Borrows syntax from regexp '[]' string range
definitions::
srange("[0-9]") -> "0123456789"
srange("[a-z]") -> "abcdefghijklmnopqrstuvwxyz"
srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
The input strin... | def srange(s):
r"""Helper to easily define string ranges for use in Word
construction. Borrows syntax from regexp '[]' string range
definitions::
srange("[0-9]") -> "0123456789"
srange("[a-z]") -> "abcdefghijklmnopqrstuvwxyz"
srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
... |
Helper method for defining parse actions that require matching at
a specific column in the input text. | def matchOnlyAtCol(n):
"""Helper method for defining parse actions that require matching at
a specific column in the input text.
"""
def verifyCol(strg,locn,toks):
if col(locn,strg) != n:
raise ParseException(strg,locn,"matched token not at column %d" % n)
return verifyCol |
Helper to define a parse action by mapping a function to all
elements of a ParseResults list. If any additional args are passed,
they are forwarded to the given function as additional arguments
after the token, as in
``hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))``,
which will conve... | def tokenMap(func, *args):
"""Helper to define a parse action by mapping a function to all
elements of a ParseResults list. If any additional args are passed,
they are forwarded to the given function as additional arguments
after the token, as in
``hex_integer = Word(hexnums).setParseAction(tokenMap... |
Helper to create a validating parse action to be used with start
tags created with :class:`makeXMLTags` or
:class:`makeHTMLTags`. Use ``withAttribute`` to qualify
a starting tag with a required attribute value, to avoid false
matches on common tags such as ``<TD>`` or ``<DIV>``.
Call ``withAttribut... | def withAttribute(*args,**attrDict):
"""Helper to create a validating parse action to be used with start
tags created with :class:`makeXMLTags` or
:class:`makeHTMLTags`. Use ``withAttribute`` to qualify
a starting tag with a required attribute value, to avoid false
matches on common tags such as ``<... |
Helper method for defining nested lists enclosed in opening and
closing delimiters ("(" and ")" are the default).
Parameters:
- opener - opening character for a nested list
(default= ``"("``); can also be a pyparsing expression
- closer - closing character for a nested list
(default= ``... | def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):
"""Helper method for defining nested lists enclosed in opening and
closing delimiters ("(" and ")" are the default).
Parameters:
- opener - opening character for a nested list
(default= ``"("``); can also be a... |
internal factory method to simplify creating one type of ParseException
from another - avoids having __init__ signature conflicts among subclasses | def _from_exception(cls, pe):
"""
internal factory method to simplify creating one type of ParseException
from another - avoids having __init__ signature conflicts among subclasses
"""
return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement) |
Extracts the exception line from the input string, and marks
the location of the exception with a special symbol. | def markInputline( self, markerString = ">!<" ):
"""Extracts the exception line from the input string, and marks
the location of the exception with a special symbol.
"""
line_str = self.line
line_column = self.column - 1
if markerString:
line_str = "".join(... |
Method to take an exception and translate the Python internal traceback into a list
of the pyparsing expressions that caused the exception to be raised.
Parameters:
- exc - exception raised during parsing (need not be a ParseException, in support
of Python exceptions that might be ... | def explain(exc, depth=16):
"""
Method to take an exception and translate the Python internal traceback into a list
of the pyparsing expressions that caused the exception to be raised.
Parameters:
- exc - exception raised during parsing (need not be a ParseException, in suppor... |
Removes and returns item at specified index (default= ``last``).
Supports both ``list`` and ``dict`` semantics for ``pop()``. If
passed no argument or an integer argument, it will use ``list``
semantics and pop tokens from the list of parsed tokens. If passed
a non-integer argument (most... | def pop( self, *args, **kwargs):
"""
Removes and returns item at specified index (default= ``last``).
Supports both ``list`` and ``dict`` semantics for ``pop()``. If
passed no argument or an integer argument, it will use ``list``
semantics and pop tokens from the list of parsed t... |
Add sequence of elements to end of ParseResults list of elements.
Example::
patt = OneOrMore(Word(alphas))
# use a parse action to append the reverse of the matched strings, to make a palindrome
def make_palindrome(tokens):
tokens.extend(reversed([t[::-1] f... | def extend( self, itemseq ):
"""
Add sequence of elements to end of ParseResults list of elements.
Example::
patt = OneOrMore(Word(alphas))
# use a parse action to append the reverse of the matched strings, to make a palindrome
def make_palindrome(tokens):
... |
Returns the parse results as a nested list of matching tokens, all converted to strings.
Example::
patt = OneOrMore(Word(alphas))
result = patt.parseString("sldkj lsdkj sldkj")
# even though the result prints in string-like form, it is actually a pyparsing ParseResults
... | def asList( self ):
"""
Returns the parse results as a nested list of matching tokens, all converted to strings.
Example::
patt = OneOrMore(Word(alphas))
result = patt.parseString("sldkj lsdkj sldkj")
# even though the result prints in string-like form, it i... |
Returns the named parse results as a nested dictionary.
Example::
integer = Word(nums)
date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
result = date_str.parseString('12/31/1999')
print(type(result), repr(result)) # -> <class 'pyparsin... | def asDict( self ):
"""
Returns the named parse results as a nested dictionary.
Example::
integer = Word(nums)
date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
result = date_str.parseString('12/31/1999')
print(type(resu... |
r"""
Returns the results name for this token expression. Useful when several
different expressions might match at a particular location.
Example::
integer = Word(nums)
ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
house_number_expr = Suppress('#') + Word(nums, a... | def getName(self):
r"""
Returns the results name for this token expression. Useful when several
different expressions might match at a particular location.
Example::
integer = Word(nums)
ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
house_number_expr = S... |
Diagnostic method for listing out the contents of
a :class:`ParseResults`. Accepts an optional ``indent`` argument so
that this string can be embedded in a nested display of other data.
Example::
integer = Word(nums)
date_str = integer("year") + '/' + integer("month") +... | def dump(self, indent='', depth=0, full=True):
"""
Diagnostic method for listing out the contents of
a :class:`ParseResults`. Accepts an optional ``indent`` argument so
that this string can be embedded in a nested display of other data.
Example::
integer = Word(nums... |
Pretty-printer for parsed results as a list, using the
`pprint <https://docs.python.org/3/library/pprint.html>`_ module.
Accepts additional positional or keyword args as defined for
`pprint.pprint <https://docs.python.org/3/library/pprint.html#pprint.pprint>`_ .
Example::
i... | def pprint(self, *args, **kwargs):
"""
Pretty-printer for parsed results as a list, using the
`pprint <https://docs.python.org/3/library/pprint.html>`_ module.
Accepts additional positional or keyword args as defined for
`pprint.pprint <https://docs.python.org/3/library/pprint.ht... |
Make a copy of this :class:`ParserElement`. Useful for defining
different parse actions for the same parsing pattern, using copies of
the original parse element.
Example::
integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
integerK = integer.copy().addParse... | def copy( self ):
"""
Make a copy of this :class:`ParserElement`. Useful for defining
different parse actions for the same parsing pattern, using copies of
the original parse element.
Example::
integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
... |
Define name for this expression, makes debugging and exception messages clearer.
Example::
Word(nums).parseString("ABC") # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
Word(nums).setName("integer").parseString("ABC") # -> Exception: Expected integer (at char 0), (l... | def setName( self, name ):
"""
Define name for this expression, makes debugging and exception messages clearer.
Example::
Word(nums).parseString("ABC") # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
Word(nums).setName("integer").parseString("ABC") #... |
Define name for referencing matching tokens as a nested attribute
of the returned parse results.
NOTE: this returns a *copy* of the original :class:`ParserElement` object;
this is so that the client can define a basic element, such as an
integer, and reference it in multiple places with ... | def setResultsName( self, name, listAllMatches=False ):
"""
Define name for referencing matching tokens as a nested attribute
of the returned parse results.
NOTE: this returns a *copy* of the original :class:`ParserElement` object;
this is so that the client can define a basic el... |
Add a boolean predicate function to expression's list of parse actions. See
:class:`setParseAction` for function call signatures. Unlike ``setParseAction``,
functions passed to ``addCondition`` need to return boolean success/fail of the condition.
Optional keyword arguments:
- message =... | def addCondition(self, *fns, **kwargs):
"""Add a boolean predicate function to expression's list of parse actions. See
:class:`setParseAction` for function call signatures. Unlike ``setParseAction``,
functions passed to ``addCondition`` need to return boolean success/fail of the condition.
... |
Enables "packrat" parsing, which adds memoizing to the parsing logic.
Repeated parse attempts at the same string location (which happens
often in many complex grammars) can immediately return a cached value,
instead of re-executing parsing/validating code. Memoizing is done of
... | def enablePackrat(cache_size_limit=128):
"""Enables "packrat" parsing, which adds memoizing to the parsing logic.
Repeated parse attempts at the same string location (which happens
often in many complex grammars) can immediately return a cached value,
instead of re-executing par... |
Execute the parse expression with the given string.
This is the main interface to the client code, once the complete
expression has been built.
If you want the grammar to require that the entire input string be
successfully parsed, then set ``parseAll`` to True (equivalent to ending
... | def parseString( self, instring, parseAll=False ):
"""
Execute the parse expression with the given string.
This is the main interface to the client code, once the complete
expression has been built.
If you want the grammar to require that the entire input string be
succe... |
Another extension to :class:`scanString`, simplifying the access to the tokens found
to match the given parse expression. May be called with optional
``maxMatches`` argument, to clip searching after 'n' matches are found.
Example::
# a capitalized word starts with an uppercase let... | def searchString( self, instring, maxMatches=_MAX_INT ):
"""
Another extension to :class:`scanString`, simplifying the access to the tokens found
to match the given parse expression. May be called with optional
``maxMatches`` argument, to clip searching after 'n' matches are found.
... |
Overrides the default whitespace chars | def setWhitespaceChars( self, chars ):
"""
Overrides the default whitespace chars
"""
self.skipWhitespace = True
self.whiteChars = chars
self.copyDefaultWhiteChars = False
return self |
Define expression to be ignored (e.g., comments) while doing pattern
matching; may be called repeatedly, to define multiple comment or other
ignorable patterns.
Example::
patt = OneOrMore(Word(alphas))
patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']
... | def ignore( self, other ):
"""
Define expression to be ignored (e.g., comments) while doing pattern
matching; may be called repeatedly, to define multiple comment or other
ignorable patterns.
Example::
patt = OneOrMore(Word(alphas))
patt.parseString('abl... |
Enable display of debugging messages while doing pattern matching. | def setDebugActions( self, startAction, successAction, exceptionAction ):
"""
Enable display of debugging messages while doing pattern matching.
"""
self.debugActions = (startAction or _defaultStartDebugAction,
successAction or _defaultSuccessDebugAction,
... |
Enable display of debugging messages while doing pattern matching.
Set ``flag`` to True to enable, False to disable.
Example::
wd = Word(alphas).setName("alphaword")
integer = Word(nums).setName("numword")
term = wd | integer
# turn on debugging for wd
... | def setDebug( self, flag=True ):
"""
Enable display of debugging messages while doing pattern matching.
Set ``flag`` to True to enable, False to disable.
Example::
wd = Word(alphas).setName("alphaword")
integer = Word(nums).setName("numword")
term = ... |
Execute the parse expression on the given file or filename.
If a filename is specified (instead of a file object),
the entire file is opened, read, and closed before parsing. | def parseFile( self, file_or_filename, parseAll=False ):
"""
Execute the parse expression on the given file or filename.
If a filename is specified (instead of a file object),
the entire file is opened, read, and closed before parsing.
"""
try:
file_contents =... |
Return Regex with an attached parse action to transform the parsed
result as if called using `re.sub(expr, repl, string) <https://docs.python.org/3/library/re.html#re.sub>`_.
Example::
make_html = Regex(r"(\w+):(.*?):").sub(r"<\1>\2</\1>")
print(make_html.transformString("h1:ma... | def sub(self, repl):
"""
Return Regex with an attached parse action to transform the parsed
result as if called using `re.sub(expr, repl, string) <https://docs.python.org/3/library/re.html#re.sub>`_.
Example::
make_html = Regex(r"(\w+):(.*?):").sub(r"<\1>\2</\1>")
... |
Extends ``leaveWhitespace`` defined in base class, and also invokes ``leaveWhitespace`` on
all contained expressions. | def leaveWhitespace( self ):
"""Extends ``leaveWhitespace`` defined in base class, and also invokes ``leaveWhitespace`` on
all contained expressions."""
self.skipWhitespace = False
self.exprs = [ e.copy() for e in self.exprs ]
for e in self.exprs:
e.leaveWhitespace... |
Helper to create a parse action for converting parsed date string to Python datetime.date
Params -
- fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``)
Example::
date_expr = pyparsing_common.iso8601_date.copy()
date_expr.setParseAction(pyparsing_... | def convertToDate(fmt="%Y-%m-%d"):
"""
Helper to create a parse action for converting parsed date string to Python datetime.date
Params -
- fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``)
Example::
date_expr = pyparsing_common.iso8601_date... |
Helper to create a parse action for converting parsed
datetime string to Python datetime.datetime
Params -
- fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``)
Example::
dt_expr = pyparsing_common.iso8601_datetime.copy()
dt_ex... | def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):
"""Helper to create a parse action for converting parsed
datetime string to Python datetime.datetime
Params -
- fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``)
Example::
dt_exp... |
Look for VCS schemes in the URL.
Returns the matched VCS scheme, or None if there's no match. | def _match_vcs_scheme(url):
# type: (str) -> Optional[str]
"""Look for VCS schemes in the URL.
Returns the matched VCS scheme, or None if there's no match.
"""
from pipenv.patched.notpip._internal.vcs import VcsSupport
for scheme in VcsSupport.schemes:
if url.lower().startswith(scheme) ... |
Check the Content-Type header to ensure the response contains HTML.
Raises `_NotHTML` if the content type is not text/html. | def _ensure_html_header(response):
# type: (Response) -> None
"""Check the Content-Type header to ensure the response contains HTML.
Raises `_NotHTML` if the content type is not text/html.
"""
content_type = response.headers.get("Content-Type", "")
if not content_type.lower().startswith("text/h... |
Return whether the URL looks like an archive. | def _is_url_like_archive(url):
# type: (str) -> bool
"""Return whether the URL looks like an archive.
"""
filename = Link(url).filename
for bad_ext in ARCHIVE_EXTENSIONS:
if filename.endswith(bad_ext):
return True
return False |
Send a HEAD request to the URL, and ensure the response contains HTML.
Raises `_NotHTTP` if the URL is not available for a HEAD request, or
`_NotHTML` if the content type is not text/html. | def _ensure_html_response(url, session):
# type: (str, PipSession) -> None
"""Send a HEAD request to the URL, and ensure the response contains HTML.
Raises `_NotHTTP` if the URL is not available for a HEAD request, or
`_NotHTML` if the content type is not text/html.
"""
scheme, netloc, path, qu... |
Access an HTML page with GET, and return the response.
This consists of three parts:
1. If the URL looks suspiciously like an archive, send a HEAD first to
check the Content-Type is HTML, to avoid downloading a large file.
Raise `_NotHTTP` if the content type cannot be determined, or
`_No... | def _get_html_response(url, session):
# type: (str, PipSession) -> Response
"""Access an HTML page with GET, and return the response.
This consists of three parts:
1. If the URL looks suspiciously like an archive, send a HEAD first to
check the Content-Type is HTML, to avoid downloading a large... |
Find the separator's index based on the package's canonical name.
`egg_info` must be an egg info string for the given package, and
`canonical_name` must be the package's canonical name.
This function is needed since the canonicalized name does not necessarily
have the same length as the egg info's nam... | def _find_name_version_sep(egg_info, canonical_name):
# type: (str, str) -> int
"""Find the separator's index based on the package's canonical name.
`egg_info` must be an egg info string for the given package, and
`canonical_name` must be the package's canonical name.
This function is needed since... |
Pull the version part out of a string.
:param egg_info: The string to parse. E.g. foo-2.1
:param canonical_name: The canonicalized name of the package this
belongs to. | def _egg_info_matches(egg_info, canonical_name):
# type: (str, str) -> Optional[str]
"""Pull the version part out of a string.
:param egg_info: The string to parse. E.g. foo-2.1
:param canonical_name: The canonicalized name of the package this
belongs to.
"""
try:
version_start ... |
Determine the HTML document's base URL.
This looks for a ``<base>`` tag in the HTML document. If present, its href
attribute denotes the base URL of anchor tags in the document. If there is
no such tag (or if it does not have a valid href attribute), the HTML
file's URL is used as the base URL.
:p... | def _determine_base_url(document, page_url):
"""Determine the HTML document's base URL.
This looks for a ``<base>`` tag in the HTML document. If present, its href
attribute denotes the base URL of anchor tags in the document. If there is
no such tag (or if it does not have a valid href attribute), the ... |
Determine if we have any encoding information in our headers. | def _get_encoding_from_headers(headers):
"""Determine if we have any encoding information in our headers.
"""
if headers and "Content-Type" in headers:
content_type, params = cgi.parse_header(headers["Content-Type"])
if "charset" in params:
return params['charset']
return Non... |
Function used to generate link sort key for link tuples.
The greater the return value, the more preferred it is.
If not finding wheels, then sorted by version only.
If finding wheels, then the sort order is by version, then:
1. existing installs
2. wheels ordered via Wheel.su... | def _candidate_sort_key(self, candidate, ignore_compatibility=True):
# type: (InstallationCandidate, bool) -> CandidateSortingKey
"""
Function used to generate link sort key for link tuples.
The greater the return value, the more preferred it is.
If not finding wheels, then sorte... |
Returns the locations found via self.index_urls
Checks the url_name on the main (first in the list) index and
use this url_name to produce all locations | def _get_index_urls_locations(self, project_name):
# type: (str) -> List[str]
"""Returns the locations found via self.index_urls
Checks the url_name on the main (first in the list) index and
use this url_name to produce all locations
"""
def mkurl_pypi_url(url):
... |
Find all available InstallationCandidate for project_name
This checks index_urls and find_links.
All versions found are returned as an InstallationCandidate list.
See _link_package_versions for details on which files are accepted | def find_all_candidates(self, project_name):
# type: (str) -> List[Optional[InstallationCandidate]]
"""Find all available InstallationCandidate for project_name
This checks index_urls and find_links.
All versions found are returned as an InstallationCandidate list.
See _link_pa... |
Try to find a Link matching req
Expects req, an InstallRequirement and upgrade, a boolean
Returns a Link if found,
Raises DistributionNotFound or BestVersionAlreadyInstalled otherwise | def find_requirement(self, req, upgrade, ignore_compatibility=False):
# type: (InstallRequirement, bool, bool) -> Optional[Link]
"""Try to find a Link matching req
Expects req, an InstallRequirement and upgrade, a boolean
Returns a Link if found,
Raises DistributionNotFound or B... |
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