class A():
    def __init__(self):
        pass

    def save(self):
        print "This is from A"


class B(A):
    def __init__(self):
        pass


class C(A):
    def __init__(self):
        pass

    def save(self):
        print  "This is from C"


class D(B,C):
    def __init__(self):
        pass


fun =  D()
fun.save()