继承:通过子类继承父类信息而达到子类可以扩展功能的目的

多重继承:通过子类继承多个类


一、多重继承一类

套用廖雪峰的例子:

https://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/0013868200511568dd94e77b21d4b8597ede8bf65c36bcd000

  • Dog - 狗狗;

  • Bat - 蝙蝠;

  • Parrot - 鹦鹉;

  • Ostrich - 鸵鸟。



按哺乳和鸟类分:

python Class:面向对象高级编程 多重继承_ Mixin

按跑和飞分:

python Class:面向对象高级编程 多重继承_ Mixin_02


总的:

python Class:面向对象高级编程 多重继承_ Mixin_03


程序:

#!/usr/bin/python
# -*- coding: utf-8 -*-

class Animal(object):
    pass


# 大类:
class Mammal(Animal):
    pass

class Bird(Animal):
    pass


#功能
class Runnable(object):
    def run(self):
        print('Running...')

class Flyable(object):
    def fly(self):
        print('Flying...')


# 各种动物:
class Dog(Mammal, Runnable):
    pass

class Bat(Mammal, Flyable):
    pass

class Parrot(Bird, Flyable):
    pass

class Ostrich(Bird, Runnable):
    pass


dog = Dog()
dog.run()


运行结果:Running...


二、多重继承二类:Mixin

除了大类,其他继承的类,只要在类名后面+Mixin就可以了。

程序:


#!/usr/bin/python
# -*- coding: utf-8 -*-

class Animal(object):
    pass


# 大类:
class Mammal(Animal):
    pass

class Bird(Animal):
    pass


#功能
class RunnableMixin(object):
    def run(self):
        print('Running...')

class FlyableMixin(object):
    def fly(self):
        print('Flying...')


# 各种动物:
class Dog(Mammal, RunnableMixin):
    pass
class Bat(Mammal, FlyableMixin):
    pass
class Parrot(Bird, FlyableMixin):
    pass
class Ostrich(Bird, RunnableMixin):


dog = Dog()
dog.run()

运行结果:Running...


最后发现,一类和二类没啥区别。。。。。。逗我呢。。。。。。。Mask一下,日后再回头看。