1.1   多重继承

>>> #最大类

... class Animal(object):

...    pass

...

>>> #大类

... class Mammal(Animal):

...    pass

...

>>> class Bird(Animal):

...    pass

...

>>> class Runnable(object):

...    def run(self):

...        print('Running...')

...

>>> classDog(Mammal, Runnable):     --同时继承Mammal, Runnable两个父类的功能

...    pass

...

>>> s = Dog()

>>> s.run()

Running...

Mixln

在设计类的继承关系时,通常,主线都是单一继承下来的;然而多重继承,为了更好的看出多重继承的关系,加上Mixln

>>> classDog(Mammal, RunnableMixln, xxxxMixln ……):

...    pass

...