Casting NamedTuple with __call__ to Callable

[b-x]

I think this should be valid:

from typing import Callable, NamedTuple

class Foo(NamedTuple):
    x: int

    def __call__(self) -> int:
        return self.x

foo: Callable[[], int] = Foo(42)

but mypy fails with:
error: Incompatible types in assignment (expression has type "Foo", variable has type "Callable[[], int]")

[aryansingla]

I want to contribute in it.
I will resolve this .

[AlexWaygood]

Seems like it might be a problem that's specific to NamedTuples; mypy is happy with this code:

from typing import Callable

class Foo:
    def __call__(self) -> int: ...

foo: Callable[[], int] = Foo()