Anonymous
public python v1 · immutableclass animal(object): def talk(self): raise NotImplementedError() def give_food(self): self.talk()class dog(animal): def talk(self): print "bark"d = dog()d.give_food()class animal(object): def talk(self): raise NotImplementedError() def give_food(self): self.talk()class dog(animal): def talk(self): print "bark"d = dog()d.give_food()