Inherited rewrite and Extension

 1 class Animal:
 2     def eat(self):
 3         print("吃")
 4 
 5     def drink(self):
 6         print("喝")
 7 
 8     def run(self):
 9         print("跑")
10 
11     def sleep(self):
12         print("睡")
13 
14 class Dog(Animal):
15     defBark (Self):
 16          Print ( " call " )
 17  
18  class XiaoTianQuan (Dog):
 19      DEF Fly (Self):
 20          Print ( " Fly " )
 21  
22      # DEF Bark (Self): 
23      #      Print ( "like God mooing ") 
24      #
 25      #      # call the parent class method bark 
26      #      Super (). bark () 
27      #
 28      #      # extension 
29      #      Print ("! @ # $ @@ (* U! ( ") 
30  
31      #python2.x expansion and rewriting 
32      DEF Bark (Self):
 33 is  
34 is          Print ( " like God called " )
 35  
36          Dog.bark (Self)
 37 [  
38 is          Print ( " @ # @ # $ @ R & lt " )
 39  
40 = XTQ XiaoTianQuan ()
 41 is  xtq.eat ()
 42 is  xtq.bark ()
 43 is xtq.fly ()

Eat 
like God called 
called 
@ # $ @ # R @ 
Fly