[issue33169] importlib.invalidate_caches() doesn't clear all caches

[Brett Cannon]

Brett Cannon <brett at python.org> added the comment:


New changeset a09bb87c1eebb07b01b8105cf536704893aec565 by Brett Cannon in branch '3.7':
[3.7] bpo-33169: Remove values of `None` from sys.path_importer_cache when invalidating caches (GH-6402) (GH-6403)
https://github.com/python/cpython/commit/a09bb87c1eebb07b01b8105cf536704893aec565


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<https://bugs.python.org/issue33169>
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