Python 继承 组合

Python 继承 组合

继承

import random as r
class Fish:def __init__(self):self.x = r.randint(0,10)self.y = r.randint(0,10)def move(self):self.x -= 1print('我的位置上: ',self.x,self.y)
class Goldfish(Fish):pass
class Carp(Fish):pass
class Salmon(Fish):pass
class Shark(Fish):def __init__(self):super().__init__()#若不加, 则__init__被替换,ve 无法调用 #Fish.__init__(self)self.hungry = Truedef eat(self):if self.hungry:print('吃货的梦想就是天天吃')self.hungry = Falseelse:print('吃不下了')

多重继承

组合

class Turtle:def __init__(self,x):self.num=xclass Fish:def __init__(self,x):self.num=xclass Pool:def __init__(self,x,y):self.turtle = Turtle(x)self.fish = Fish(y)def print_num(self):print('水池里有乌龟 %d 只,鱼 %d 条'%(self.turtle.num,self.fish.num))