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gh-74690: typing: Call _get_protocol_attrs and _callable_members_only at protocol class creation time, not during isinstance() checks #103160

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Merged
AlexWaygood merged 9 commits into from
Apr 5, 2023
Merged

gh-74690: typing: Call _get_protocol_attrs and _callable_members_only at protocol class creation time, not during isinstance() checks #103160

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f15c64a
gh-74690: typing: Cache results of `_get_protocol_attrs` and `_callab…
AlexWaygood Mar 31, 2023
f3ec3db
Simplify and inline
AlexWaygood Apr 1, 2023
8e3c6f7
Use a metaclass instance method, not a classmethod on the class
AlexWaygood Apr 1, 2023
a34f700
Move to class-creation time
AlexWaygood Apr 1, 2023
4d05074
Use `__init__`, not `__new__`
AlexWaygood Apr 1, 2023
d3f9ebe
Add missing `super().__init__()` call, to be safe
AlexWaygood Apr 1, 2023
e8a6304
Merge branch 'main' into protocol-attrs-cache-1
AlexWaygood Apr 2, 2023
4816afa
Merge branch 'main' into protocol-attrs-cache-1
AlexWaygood Apr 5, 2023
08af615
Update Lib/typing.py
AlexWaygood Apr 5, 2023
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Add missing super().__init__() call, to be safe
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@AlexWaygood
AlexWaygood authored Apr 1, 2023
commit d3f9ebee0fb88db3d87bac71180fa00ab853f2c4
1 change: 1 addition & 0 deletions Lib/typing.py
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Expand Up @@ -1998,6 +1998,7 @@ class _ProtocolMeta(ABCMeta):
# This metaclass is really unfortunate and exists only because of
# the lack of __instancehook__.
def __init__(cls, *args, **kwargs):
super().__init__(*args, **kwargs)
cls.__protocol_attrs__ = _get_protocol_attrs(cls)
# PEP 544 prohibits using issubclass()
# with protocols that have non-method members.
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