Python多继承

# -*- coding: utf-8 -*-
"""
Created on Tue Nov 13 16:56:03 2018

@author: zhen
"""
class Machine:
    mileages = 0.0 # 类变量，在该类及其子类的实例中共享
    def __init__(self, engine, speed):
        self.engine = engine
        self.speed = speed
        
class Aricraft(Machine):
    def fly(self, miles):
        Aricraft.mileages += miles
        print("the aircrift has", Aricraft.mileages, "miles")
        
class Tank(Machine):
    def travel(self, miles):
        Tank.mileages += miles
        print("the tank has", Tank.mileages, "miles")
        
aricraft = Aricraft("涡扇9", "800km/h")
aricraft.fly(600)
tank = Tank("V8缸涡轮增压", "120km/h")
tank.travel(300)

class Fighter(Aricraft,Tank): # 多继承，尽量避免多个父类存在相同函数的情况
    def __missile(self): # 私有方法，只能类内访问
        print("emission missile and shell !")
    def fly(self, miles):
        Aricraft.mileages += miles
        print("the fighter has fly", Aricraft.mileages, "miles")
        Fighter.__missile(self)        
    def travel(self, miles):
        Tank.mileages += miles
        print("the fighter has travel", Tank.mileages, "miles")
        
fighter = Fighter("涡扇15", "1200km/h")
fighter.fly(1800)
fighter.travel(600)
# 查看类继承顺序
print(Fighter.__mro__) # object是所有类的基类

结果：