python丰富你的类

class Animals(Animate):

    def breathe(self):

        print('breathing')

    def move(self):

        print('moving')

    def eat_food(self):

        print('eating food')

class Mammals(Animals):

    def feed_young_with_milk(self):

        print('feeding young')

class Giraffes(Mammals):

    def eat_leaves_from_trees(self):

        print('eating leaves')