class C(object):

    def my_method(self):
        print('in function c')


class B(C):

    def my_method(self):
        print('in function b')


class A(B):

    def my_method(self):
        super(A, self).my_method()
obj_a = A()
super(A, obj_a).my_method()
super(B, obj_a).my_method()
How to call super method?