mypy generic with extends Interface

generic.py

# generic with extends Interface

class PointableProtocol(Protocol):
    x: Any
    y: Any

    def __init__(self, x: Any, y: Any) -> None:
        pass


T = TypeVar("T", bound=PointableProtocol)


def normalize_point_order(p1: T, p2: T) -> Tuple[T, T]:

    runtime_type = p1.__class__

    res1 = runtime_type(int(min(p1.x, p2.x)), int(min(p1.y, p2.y)))
    res2 = runtime_type(
        int(max(p1.x, p2.x)), int(max(p1.y, p2.y))
    )

    return res1, res2