Shared via mypy Playground

main.py

from typing import Protocol, TypedDict, Unpack, Any


class Factory(Protocol):
    def __call__(self, **kwargs: Any) -> Any:
        pass


def use_factory(factory: Factory):
    pass


class MyParams(TypedDict):
    a: int


class MyFactory(Protocol):
    def __call__(self, **kwargs: Unpack[MyParams]) -> Any:
        pass


def mypy_fails(factory: MyFactory):
    use_factory(factory)