See method resolution order effects

strange_inheritance.py

class ClassA(object):
    print("Class A")

    def __init__(self):
        print("Instance of A")

    def test(self):
        print("Test of A")


class ClassB(object):
    print("Class B")

    def __init__(self):
        print("Instance of B")

    def test(self):
        print("Test of B")


class ClassC(object):
    print("Class C")

    def __init__(self):
        print("Instance of C")

    def test(self):
        print("Test of C")


class BigSalad(ClassA, ClassB, ClassC):

    def test(self, *args, **kwargs):
        super(BigSalad, self).test(*args, **kwargs)

if __name__ == "__main__":
    s = BigSalad()
    s.test()