python的语法基础之类的特性

Posted 2020-11-09 python学习

一、类的继承

例：

import random as  r
class Fish():
    def __init__(self):
        self.x=r.randint(0,10)
        self.y=r.randint(0, 10)
    def move(self):
        print("现在的位置是：" ,self.x,self.y)
class Goldfish(Fish):
    pass
class Shark(Fish):
    def __init__(self):
        super().__init__()
        self.hungry=True
    def eat(self):
        if self.hungry:
            print("我在吃东西，肚子好饿")
            self.hungry=False
        else:
            print("好饱，吃不下了，呜呜")
fish=Fish()
fish.move()
goldfish=Goldfish()
goldfish.move()
shark=Shark()
shark.move()
shark.eat()
shark.eat()


二、类的多重继承
例：

class Base1:
    def Fun1(self):
       print("我是Fun1，我是Base1的方法")
class Base2:
    def Fun2(self):
       print("我是Fun2，我是Base2的方法")
class User(Base1,Base2):
    pass
client=User()
client.Fun1()
client.Fun2()


三、类的组合
例：

class Fish:
    def __init__(self,x):
        self.num=x

class Wugui:
    def __init__(self, x):
        self.num = x
class Pool:
    def __init__(self,x,y):
        self.wugui=Wugui(x)
        self.fish=Fish(y)
    def print_num(self):
        print("水池里面一共有乌龟%d 只，小鱼%d 条 "  % (self.wugui.num,self.fish.num))
pool=Pool(1,3)
pool.print_num()