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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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Lib/test/test_importlib/test_api.py
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@ -406,7 +406,7 @@ class InvalidateCacheTests:
# There should be no issues if the method is not defined.
key = 'gobbledeegook'
sys.path_importer_cache[key] = None
self.addCleanup(lambda: sys.path_importer_cache.__delitem__(key))
self.addCleanup(lambda: sys.path_importer_cache.pop(key, None))
self.init.invalidate_caches() # Shouldn't trigger an exception.