MyPy abstract method implementation check

mypy_check.py

import abc
from typing import List, Type

class AbstractClass(metaclass=abc.ABCMeta):
    def __init__(self) -> None:
        pass

    @staticmethod
    @abc.abstractmethod
    def is_ok() -> bool:
        pass

    @staticmethod
    def available_subclasses() -> List[Type["AbstractClass"]]:
        available_interfaces = []
        for subclass in AbstractClass.__subclasses__():
            is_ok_method = getattr(subclass, "is_ok", None)
            if callable(is_ok_method):
                available_interfaces.append(subclass)
        return available_interfaces
        # return [subclass for subclass in AbstractClass.__subclasses__() if subclass.is_ok()]


class ConcreteClass(AbstractClass):
    def __init__(self) -> None:
        super().__init__()

    # @staticmethod
    # def is_ok() -> bool:
    #     return True