Ryan Sobol added the comment:
Also, I'm a bit puzzled about something from the previously mentioned Integer
class and its use of __future__.annotations.
Why is it possible to declare an Integer return type for the add() method, but
only possible to declare an "Integer" forwar
Ryan Sobol added the comment:
Does anyone know why the treatment of unresolved references was changed in 3.9?
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Python tracker
<https://bugs.python.org/issue41
Ryan Sobol added the comment:
It's worth pointing out that a similar error is produced for a
forward-referenced return type of a registered method, but only for python3.9.
For example:
from __future__ import annotations
from functools import singledispatchmethod
class Integer:
