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bpo-33169: Remove values of None from sys.path_importer_cache when invalidating caches (GH-6402)

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An entry of None in sys.path_importer_cache represents a negative/missing finder for a path, so clearing it out makes sense.
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Brett Cannon 2018-04-06 16:10:18 -07:00 • committed by GitHub
parent 3a9ccee0e5
commit 9e2be60634
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6 changed files with 652 additions and 620 deletions
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Doc/library/importlib.rst
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@ -1081,7 +1081,12 @@ find and load modules.
.. classmethod:: invalidate_caches()
Calls :meth:`importlib.abc.PathEntryFinder.invalidate_caches` on all
finders stored in :attr:`sys.path_importer_cache`.
finders stored in :data:`sys.path_importer_cache` that define the method.
Otherwise entries in :data:`sys.path_importer_cache` set to ``None`` are
deleted.
.. versionchanged:: 3.7
Entries of ``None`` in :data:`sys.path_importer_cache` are deleted.
.. versionchanged:: 3.4
Calls objects in :data:`sys.path_hooks` with the current working