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Issue 3747: Fix caching in ABCMeta.__subclasscheck__ (R: Georg Brandl)

This commit is contained in:
Nick Coghlan 2008-09-02 10:14:47 +00:00
parent 0792cbf5e1
commit 91ae3ea2b4
1 changed files with 2 additions and 2 deletions
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4
Lib/abc.py
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@ -159,12 +159,12 @@ class ABCMeta(type):
# Check if it's a subclass of a registered class (recursive)
for rcls in cls._abc_registry:
if issubclass(subclass, rcls):
cls._abc_registry.add(subclass)
cls._abc_cache.add(subclass)
return True
# Check if it's a subclass of a subclass (recursive)
for scls in cls.__subclasses__():
if issubclass(subclass, scls):
cls._abc_registry.add(subclass)
cls._abc_cache.add(subclass)
return True
# No dice; update negative cache
cls._abc_negative_cache.add(subclass)