Python: Multiple inheritance with different signatures

demo_multipleinheritance.py

""" Different signature multiple inheritance
"""

# Explicit is better than implicit


class A:
    def __init__(self, a, b):
        print(
            "Init {} with arguments {}".format(self.__class__.__name__, (a, b))
        )


class B:
    def __init__(self, q):
        print("Init {} with arguments {}".format(self.__class__.__name__, (q)))


class C(A, B):
    def __init__(self):
        # Unbound functions, so pass in self explicitly
        A.__init__(self, 1, 2)
        B.__init__(self, 3)


# Using super: Super considers a mecanism via the mro so consider a class that support all arguments. Here you rely on the mro so it may be confusing if you have some similarity in between signatures.


class D:
    def __init__(self, a=None, b=None, *args, **kwargs):
        super().__init__(*args, **kwargs)
        print(
            "Init {} with arguments {}".format(self.__class__.__name__, (a, b))
        )


class E:
    def __init__(self, q=None, *args, **kwargs):
        super().__init__(*args, **kwargs)
        print("Init {} with arguments {}".format(self.__class__.__name__, (q)))


class F(D, E):
    def __init__(self):
        super().__init__(a=1, b=2, q=3)


if __name__ == "__main__":
    c = C()
    print(C.mro())
    f = F()
    print(F.mro())