demonstrating diamond problem stuff with super in python

diamond_problem.py

class A:
    def x(self):
        print('x: A')


class B(A):
    def x(self):
        super().x()
        print('x: B')

    def y(self):
        print('y: B')

    def z(self):
        print('z: B')


class C(A):
    def x(self):
        super().x()
        print('x: C')

    def y(self):
        print('y: C')

    def z(self):
        print('z: C')


class D(C, B):
    def z(self):
        super().z()
        print('z: D')


d = D()
d.x()
d.y()
d.z()

print(D.mro())

Output:

x: A
x: B
x: C
y: C
z: C
z: D
[<class '__main__.D'>, <class '__main__.C'>, <class '__main__.B'>, <class '__main__.A'>, <class 'object'>]