#!/usr/bin/env python

class A(object):
	def __init__(self):
		self.__a = 4711

	def x(self):
		return self.__a

class B(A):
	def __init__(self):
		A.__init__(self)
		self.__a = 4712

if __name__ == "__main__":
	a = B()
	assert(a.x() == 4711)