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Using functools.partial to make functions not considered as methods when given as enum values no longer works #125316

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@bluthej

Bug report

Bug description:

On python 3.10-3.12, the following snippet prints True, while on Python 3.13.0 it prints False:

from enum import Enum
from functools import partial


def a():
    pass


def b():
    pass


class MyCallables(Enum):
    A = a
    B = partial(b)


print(MyCallables.B in MyCallables)

This is because MyCallables.B is considered to be functools.partial(<function b at 0x756d7f0065c0>) on 3.13.0, when it used to be <MyCallables.B: functools.partial(<function b at 0x71f7cbc407c0>)> before.

This is something I've been using to allow function values in enums not to be considered methods, which I most likely got from this thread. In the example above, A would always be considered a method.

It seems like on 3.13.0, the "wrapper class" approach is the only one that works.

CPython versions tested on:

3.10, 3.11, 3.12, 3.13

Operating systems tested on:

Linux, Windows

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    3.13bugs and security fixesstdlibStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or error

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