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[3.10] bpo-46655: allow stringized TypeAlias with get_type_hints (GH-31156). (#31175)

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(cherry picked from commit 77b025be4a)

Co-authored-by: Gregory Beauregard <greg@greg.red>
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Gregory Beauregard 2022-02-07 08:21:56 -08:00 • committed by GitHub
parent c1ff4cb98b
commit e2eeffefed
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3 changed files with 7 additions and 1 deletions
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Lib/typing.py
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@ -165,7 +165,7 @@ def _type_check(arg, msg, is_argument=True, module=None, *, allow_special_forms=
if (isinstance(arg, _GenericAlias) and
arg.__origin__ in invalid_generic_forms):
raise TypeError(f"{arg} is not valid as type argument")
if arg in (Any, NoReturn, Final):
if arg in (Any, NoReturn, Final, TypeAlias):
return arg
if isinstance(arg, _SpecialForm) or arg in (Generic, Protocol):
raise TypeError(f"Plain {arg} is not valid as type argument")