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__pycache__	-	Open
_adapters.py	1.82 MB	View DL Edit
_collections.py	743 B	View DL Edit
_compat.py	1.81 MB	View DL Edit
_functools.py	2.83 MB	View DL Edit
_itertools.py	2.02 MB	View DL Edit
_meta.py	1.13 MB	View DL Edit
_text.py	2.12 MB	View DL Edit
__init__.py	30.65 MB	View DL Edit

Edit file: /usr/lib/python3.9/site-packages/importlib_metadata/_compat.py

import sys
import platform

__all__ = ['install', 'NullFinder', 'Protocol']

try:
    from typing import Protocol
except ImportError:  # pragma: no cover
    # Python 3.7 compatibility
    from typing_extensions import Protocol  # type: ignore

def install(cls):
    """
    Class decorator for installation on sys.meta_path.

Adds the backport DistributionFinder to sys.meta_path and
    attempts to disable the finder functionality of the stdlib
    DistributionFinder.
    """
    sys.meta_path.append(cls())
    disable_stdlib_finder()
    return cls

def disable_stdlib_finder():
    """
    Give the backport primacy for discovering path-based distributions
    by monkey-patching the stdlib O_O.

See #91 for more background for rationale on this sketchy
    behavior.
    """

def matches(finder):
        return getattr(
            finder, '__module__', None
        ) == '_frozen_importlib_external' and hasattr(finder, 'find_distributions')

for finder in filter(matches, sys.meta_path):  # pragma: nocover
        del finder.find_distributions

class NullFinder:
    """
    A "Finder" (aka "MetaClassFinder") that never finds any modules,
    but may find distributions.
    """

@staticmethod
    def find_spec(*args, **kwargs):
        return None

# In Python 2, the import system requires finders
    # to have a find_module() method, but this usage
    # is deprecated in Python 3 in favor of find_spec().
    # For the purposes of this finder (i.e. being present
    # on sys.meta_path but having no other import
    # system functionality), the two methods are identical.
    find_module = find_spec

def pypy_partial(val):
    """
    Adjust for variable stacklevel on partial under PyPy.

Workaround for #327.
    """
    is_pypy = platform.python_implementation() == 'PyPy'
    return val + is_pypy

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