Guido van Rossum <[email protected]> added the comment:
Looks like the more likely use case would be PEP 563:
from __future__ import annotations
from typing import TypeAlias, get_type_hints
import typing
class C:
a: TypeAlias = int
print(get_type_hints(C))
This prints
Traceback (most recent call last):
File "C:\Users\gvanrossum\cpython\t.py", line 9, in <module>
print(get_type_hints(C))
File
"C:\Users\gvanrossum\AppData\Local\Programs\Python\Python310\lib\typing.py",
line 1808, in get_type_hints
value = _eval_type(value, base_globals, base_locals)
File
"C:\Users\gvanrossum\AppData\Local\Programs\Python\Python310\lib\typing.py",
line 326, in _eval_type
return t._evaluate(globalns, localns, recursive_guard)
File
"C:\Users\gvanrossum\AppData\Local\Programs\Python\Python310\lib\typing.py",
line 690, in _evaluate
type_ = _type_check(
File
"C:\Users\gvanrossum\AppData\Local\Programs\Python\Python310\lib\typing.py",
line 171, in _type_check
raise TypeError(f"Plain {arg} is not valid as type argument")
----------
nosy: +gvanrossum
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<https://bugs.python.org/issue46655>
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