Stowage/cpython
2
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2026-01-07 16:02:55 +00:00
Code Issues Projects Releases Packages Wiki Activity

bpo-46643: Fix stringized P.args/P.kwargs with get_type_hints (GH-31238)

Browse source
This commit is contained in:
Gregory Beauregard 2022-03-02 17:14:52 -08:00 • committed by GitHub
parent 50ec3453c5
commit 75d2d945b4
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
3 changed files with 15 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Lib/test/test_typing.py
View file

@ -5187,6 +5187,18 @@ def test_args_kwargs(self):
self.assertEqual(repr(P.args), "P.args")
self.assertEqual(repr(P.kwargs), "P.kwargs")
def test_stringized(self):
P = ParamSpec('P')
class C(Generic[P]):
func: Callable["P", int]
def foo(self, *args: "P.args", **kwargs: "P.kwargs"):
pass
self.assertEqual(gth(C, globals(), locals()), {"func": Callable[P, int]})
self.assertEqual(
gth(C.foo, globals(), locals()), {"args": P.args, "kwargs": P.kwargs}
)
def test_user_generics(self):
T = TypeVar("T")
P = ParamSpec("P")

3
Lib/typing.py
View file

@ -181,7 +181,8 @@ def _type_check(arg, msg, is_argument=True, module=None, *, allow_special_forms=
return arg
if isinstance(arg, _SpecialForm) or arg in (Generic, Protocol):
raise TypeError(f"Plain {arg} is not valid as type argument")
if isinstance(arg, (type, TypeVar, ForwardRef, types.UnionType, ParamSpec)):
if isinstance(arg, (type, TypeVar, ForwardRef, types.UnionType, ParamSpec,
ParamSpecArgs, ParamSpecKwargs)):
return arg
if not callable(arg):
raise TypeError(f"{msg} Got {arg!r:.100}.")

1
Misc/NEWS.d/next/Library/2022-02-09-22-40-11.bpo-46643.aBlIx1.rst Normal file
View file

@ -0,0 +1 @@
In :func:`typing.get_type_hints`, support evaluating stringified ``ParamSpecArgs`` and ``ParamSpecKwargs`` annotations. Patch by Gregory Beauregard.