python基础--多态

 1 __author__ = "Alex Li"
 2 
 3 
 4 class Animal:
 5     def __init__(self, name):  # Constructor of the class
 6         self.name = name
 7 
 8     def talk(self):  # Abstract method, defined by convention only
 9         pass #raise NotImplementedError("Subclass must implement abstract method")
10 
11     @staticmethod
12     def animal_talk(obj):
13         obj.talk()
14 
15 class Cat(Animal):
16     def talk(self):
17         print(‘Meow!‘)
18 
19 
20 class Dog(Animal):
21     def talk(self):
22         print(‘Woof! Woof!‘)
23 
24 
25 d = Dog("陈荣华")
26 #d.talk()
27 
28 c = Cat("徐良伟")
29 #c.talk()
30 #
31 # def animal_talk(obj):
32 #     obj.talk()
33 
34 Animal.animal_talk(c)
35 Animal.animal_talk(d)