setuptools/_importlib.py

import sys


def disable_importlib_metadata_finder(metadata):
    """
    Ensure importlib_metadata doesn't provide older, incompatible
    Distributions.

    Workaround for #3102.
    """
    try:
        import importlib_metadata
    except ImportError:
        return
    if importlib_metadata is metadata:
        return
    to_remove = [
        ob
        for ob in sys.meta_path
        if isinstance(ob, importlib_metadata.MetadataPathFinder)
    ]
    for item in to_remove:
        sys.meta_path.remove(item)


if sys.version_info < (3, 10):
    from setuptools.extern import importlib_metadata as metadata
    disable_importlib_metadata_finder(metadata)
else:
    import importlib.metadata as metadata  # noqa: F401


if sys.version_info < (3, 9):
    from setuptools.extern import importlib_resources as resources
else:
    import importlib.resources as resources  # noqa: F401