New submission from Ismo Toijala <ismo.toij...@gmail.com>:
The following example should work but does not.
Note that it does work without the future import.
from __future__ import annotations
import typing
def f() -> typing.NoReturn:
pass
typing.get_type_hints(f)
Traceback (most recent call last):
File "foo.py", line 8, in <module>
typing.get_type_hints(f)
File "/usr/lib/python3.7/typing.py", line 1001, in get_type_hints
value = _eval_type(value, globalns, localns)
File "/usr/lib/python3.7/typing.py", line 260, in _eval_type
return t._evaluate(globalns, localns)
File "/usr/lib/python3.7/typing.py", line 466, in _evaluate
is_argument=self.__forward_is_argument__)
File "/usr/lib/python3.7/typing.py", line 135, in _type_check
raise TypeError(f"Plain {arg} is not valid as type argument")
TypeError: Plain typing.NoReturn is not valid as type argument
----------
components: Library (Lib)
messages: 327274
nosy: itoijala
priority: normal
severity: normal
status: open
title: NoReturn not allowed by get_type_hints when future import annotations is
used
type: behavior
versions: Python 3.7
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue34921>
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