#!/usr/local/bin/python3 from types import MethodType class A(object): def __init__(self): self.a = 1 class B(A): def __init__(self): self._a = 0 super(A, self).__init__() self.a = MethodType(a, self) def r(self): self.a = 2 def a(self): return self._a print(B().a())