8000 gh-105144: Runtime-checkable protocols: move all 'sanity checks' to `_ProtocolMeta.__subclasscheck__` by AlexWaygood · Pull Request #105152 · python/cpython · GitHub
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gh-105144: Runtime-checkable protocols: move all 'sanity checks' to _ProtocolMeta.__subclasscheck__ #105152

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Merged
merged 4 commits into from
May 31, 2023
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gh-105144: Runtime-checkable protocols: move all 'sanity checks' to _ProtocolMeta.__subclasscheck__ #105152

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Runtime-checkable protocols: move all 'sanity checks' to `_ProtocolMe…
AlexWaygood May 31, 2023
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Simplify
AlexWaygood May 31, 2023
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Explicitly clear the cache
AlexWaygood May 31, 2023
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off-by-one error in a comment!
AlexWaygood May 31, 2023
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off-by-one error in a comment!
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@AlexWaygood
AlexWaygood committed May 31, 2023
commit 3ba9647d31cf08234cfce3cb6357b6e6552a29fb
1 change: 0 additions & 1 deletion Lib/typing.py
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Expand Up @@ -1877,7 +1877,6 @@ def _proto_hook(other):
if not cls.__dict__.get('_is_protocol', False):
return NotImplemented

# Second, perform the actual structural compatibility check.
for attr in cls.__protocol_attrs__:
for base in other.__mro__:
# Check if the members appears in the class dictionary...
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