Invoke unbound method

unbound-parent-method.py

class A(object):
    def __init__(self):
        self.name = 'Andy'

    def tell(what):
        def inner(self):
            print(" -- %s, %s!" % (what, self.name))
        return inner

    hi = tell("Hello")

class B(A):
    def __init__(self):
        self.name = 'Billy Bob'

    tell = A.tell.__func__
    bye = tell("Bye")

class C(object):
    def __init__(self):
        self.name = 'Charlie'

    tell = A.tell.__func__
    bye = tell("See ya")

A().hi()    # -- Hello, Andy!
B().bye()   # -- Bye, Billy Bob!
C().bye()   # -- See ya, Charlie!