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specifiersversion RequirementNormalizedExtrarequires_python version_info.returnc U c g[ R " U 5 n[ R " SR [ [ U5 5 5 nX2; $ )a|
Check if the given Python version matches a "Requires-Python" specifier.
:param version_info: A 3-tuple of ints representing a Python
major-minor-micro version to check (e.g. `sys.version_info[:3]`).
:return: `True` if the given Python version satisfies the requirement.
Otherwise, return `False`.
:raises InvalidSpecifier: If `requires_python` has an invalid format.
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req_stringc [ U 5 $ )z5Construct a packaging.Requirement object with cachingr )r s r get_requirementr % s z ""r extrac j [ [ [ R " SSU 5 R 5 5 $ )a0 Convert an arbitrary string to a standard 'extra' name
Any runs of non-alphanumeric characters are replaced with a single '_',
and the result is always lowercased.
This function is duplicated from ``pkg_resources``. Note that this is not
the same to either ``canonicalize_name`` or ``_egg_link_name``.
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