class Parent(object):

    def override(self):
        print("PARENT override()")

    def implicit(self):
        print("PARENT implicit()")

    def altered(self):
        print("PARENT altered()")


class Child(Parent):
    
    def override(self):
        print("CHILD, override()")

    def altered(self):
        print("CHILD, BERFORE altered()")
        super(Child, self).altered()
        print("CHILD, AFTER PARENT altered()")

        
dad = Parent()
son = Child()

dad.implicit()
son.implicit()

dad.override()
son.override()

dad.altered()
son.altered()