Bug: PEP 695 type aliases fail to unwrap with typing-extensions 4.13.0

[airwoodix]

Description

When poylfactory is used with typing_extensions 4.13.0, PEP 695 type aliases do not unwrap properly in polyfactory.utils.helpers.unwrap_annotation. See the MCVE below.

The issue was introduced by python/typing_extensions#477, which made typing_extensions.TypeAliasType and typing.TypeAliasType different types for Python 3.12 and 3.13. This breaks the detection in unwrap_annotation.

MCVE

import typing
from random import SystemRandom

import typing_extensions
from polyfactory.utils.helpers import unwrap_annotation

type MyInt = int

assert not isinstance(MyInt, typing_extensions.TypeAliasType)  # ok
assert isinstance(MyInt, typing.TypeAliasType)  # ok

unwrapped = unwrap_annotation(MyInt, random=SystemRandom())
assert unwrapped is MyInt  # unexpeced, but passes
assert unwrapped is int  # expected, but fails

Release Version

• Python 3.12.2 (probably hits on any 3.12.x and 3.13.x)
• typing_extensions 4.13.0
• polyfactory 2.20.0

Platform

• Linux
• Mac
• Windows
• Other (Please specify in the description above)

[airwoodix]

typing_extensions perspective: python/typing_extensions#560

In particular, one cannot assume that eponymous symbols in typing and typing_extensions are the same across all supported Python versions and typing_extensions releases.