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gh-105499: Defer "import warnings" in typing (#132061)

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A bunch of other warnings in typing.py were already deferred, but
I added a few non-lazy ones.
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Jelle Zijlstra 2025-04-04 06:19:42 -07:00 • committed by GitHub
parent 20098719df
commit d1db43c139
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1 changed files with 4 additions and 1 deletions
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5
Lib/typing.py
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@ -30,7 +30,6 @@
import sys
import types
from types import GenericAlias
import warnings
from _typing import (
_idfunc,
@ -1626,14 +1625,17 @@ def __getitem__(self, params):
class _UnionGenericAliasMeta(type):
def __instancecheck__(self, inst: object) -> bool:
import warnings
warnings._deprecated("_UnionGenericAlias", remove=(3, 17))
return isinstance(inst, Union)
def __subclasscheck__(self, inst: type) -> bool:
import warnings
warnings._deprecated("_UnionGenericAlias", remove=(3, 17))
return issubclass(inst, Union)
def __eq__(self, other):
import warnings
warnings._deprecated("_UnionGenericAlias", remove=(3, 17))
if other is _UnionGenericAlias or other is Union:
return True
@ -1650,6 +1652,7 @@ class _UnionGenericAlias(metaclass=_UnionGenericAliasMeta):
"""
def __new__(cls, self_cls, parameters, /, *, name=None):
import warnings
warnings._deprecated("_UnionGenericAlias", remove=(3, 17))
return Union[parameters]