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Edit file: /opt/alt/python37/lib/python3.7/site-packages/importlib_metadata/_compat.py

import sys

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

try:
    from typing import Protocol
except ImportError:  # pragma: no cover
    """
    pytest-mypy complains here because:
    error: Incompatible import of "Protocol" (imported name has type
    "typing_extensions._SpecialForm", local name has type "typing._SpecialForm")
    """
    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

class PyPy_repr:
    """
    Override repr for EntryPoint objects on PyPy to avoid __iter__ access.
    Ref #97, #102.
    """

affected = hasattr(sys, 'pypy_version_info')

def __compat_repr__(self):  # pragma: nocover
        def make_param(name):
            value = getattr(self, name)
            return f'{name}={value!r}'

params = ', '.join(map(make_param, self._fields))
        return f'EntryPoint({params})'

if affected:  # pragma: nocover
        __repr__ = __compat_repr__
    del affected

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