python3（二十八）manyExten

""" 多重继承 """
__author__ = 'shaozhiqi'
 
# start ------------------------------------------------------
class Animal(object):
    pass
 
# 哺乳动物 -----------------------------------------------
class Mammal(Animal):
    def __init__(self):
        print(' 非蛋生。。。。。')
 
# 鸟类---------------------------------------------------------
class Bird(Animal):
    def __init__(self):
        print(' 蛋生。。。。。')
 
# 功能类-------------------------------------------------------
class Runnable(object):
    def run(self):
        print('Running...')
 
class Flyable(object):
    def fly(self):
        print('Flying...')
 
# 各种动物:----------------------------------------------------
# 多重继承 继承了Mammal, Runnable等
class Dog(Mammal, Runnable):
    pass
 
class Bat(Mammal, Flyable):  # 蝙蝠
    pass
 
class Parrot(Bird, Flyable):  # 鹦鹉
    pass
 
class Ostrich(Bird, Runnable):  # 鸵鸟
    pass
 
dog = Dog()  # 非蛋生。。。。。
dog.run()  # Running...
 
bat = Bat()  # 非蛋生。。。。。
bat.fly()  # Flying...
 
# MixIn混合继承（一般简单业务都是单一主线继承）
# 为了更好地看出继承关系，我们把Runnable和Flyable改为RunnableMixIn和FlyableMixIn