OOP.py

class A:
    def test(self):
        print("test of A called")
class B(A):
    def test(self):
        print('test of B called')
        super().test()
class C(A):
    def test(self):
        print("test of C called")
        super().test()
class D(B,C):
    def test2(self):
        print("test of D called")
obj = D()
print(obj.test())
print(obj.test2())