NotImplemented is not callable

[ltworf]

I'm aware of this python/mypy#6710

I understand the points raised here python/mypy#6710

However the current issue is that

raise NotImplemented()

seems perfectly valid to mypy when in fact it isn't, since it's not callable.

So basically, it should have been a NotImplementedError but mypy didn't find it (I found it with pyflakes).

Do you think it is possible to make it an almost-but-non-callable-Any?

Otherwise it could perhaps be mypy to warn about odd uses?

[srittau]

We could try to make NotImplemented a sub-class of Any and override __call__():

from typing import Any

class NotImplemented(Any):
    __call__: None
    
def bar() -> str:
    return NotImplemented()

x: NotImplemented
x()

Not very elegant and the error message is not correct, but maybe better than nothing?

---

Typo in bar(). Does not work.