class ClassOne:
    @classmethod
    def __init_subclass__(cls):
        print(f"ClassOne.__init_subclass__( cls = {cls} )")

class ClassTwo:
    @classmethod
    def __init_subclass__(cls):
        print(f"ClassTwo.__init_subclass__( cls = {cls} )")


class MyClass(ClassOne, ClassTwo):
    def __init__(self):
        super().__init__()
        super(ClassOne, self).__init__()