一、类的继承
例:
1 import random as r 2 class Fish(): 3 def __init__(self): 4 self.x=r.randint(0,10) 5 self.y=r.randint(0, 10) 6 def move(self): 7 print("现在的位置是:" ,self.x,self.y) 8 class Goldfish(Fish): 9 pass 10 class Shark(Fish): 11 def __init__(self): 12 super().__init__() 13 self.hungry=True 14 def eat(self): 15 if self.hungry: 16 print("我在吃东西,肚子好饿") 17 self.hungry=False 18 else: 19 print("好饱,吃不下了,呜呜") 20 fish=Fish() 21 fish.move() 22 goldfish=Goldfish() 23 goldfish.move() 24 shark=Shark() 25 shark.move() 26 shark.eat() 27 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()