Exercise 44b - composition

class Other(object):
    def override(self):
        print("OTHER override()")


    def implicity(self):
        print("OTHER implicity()")
    
    
    def altered(self):
        print("OTHER altered()")


class Child(object):
    def __init__(self):
        self.other = Other()


    def implicity(self):
        self.other.implicity()
    
    
    def override(self):
        print("CHILD override()")
    
    
    def altered(self):
        print("CHILD, BEFORE OTHER altered()")
        self.other.altered()
        print("CHILD, AFTER OTHER altered()")


son = Child()

son.implicity()
son.override()
son.altered()

OTHER implicity()
CHILD override()
CHILD, BEFORE OTHER altered()
OTHER altered()
CHILD, AFTER OTHER altered()