A class and example sublclass that casts attributes to their annotated types

annotation_casting_class.py

from typing import Dict, Any


class SelfCastingClass:
    def __init__(self, **kwargs: Dict[str, Any]):
        for k, v in kwargs.items():
            self.__setattr__(k, self.__annotations__[k](v))

    def __repr__(self):
        return "{" + ", ".join([f"'{k}': {v.__repr__()}" for k, v in self.__dict__.items()]) + "}"


class ExampleCastedClass(SelfCastingClass):
    """
    >>> ac=ExampleCastedClass("3", 5)
    >>> ac
    {'x': 3, 'y': '5'}
    """
    x: int
    y: str

    def __init__(self, x, y):
        self.x = x
        self.y = y
        super().__init__(**self.__dict__)


if __name__ == '__main__':
    import doctest

    doctest.testmod()
    print("Test Success!")