Python 抽象类究极版

Python的抽象类,就是假设我们在一个类Animal中继承ABC类,并且在这个类中定义一个绑定abstractmethod装饰器的方法eat().

如果这个时候再定义一个类Dog继承Animal类,那么Dog类必须得用有eat()方法才不会报错.

话不多说,上代码.

Dog类中有eat()方法

 1 from abc import ABC, abstractmethod
 2 
 3 
 4 class Animal(ABC):
 5     @abstractmethod
 6     def eat(self):
 7         pass
 8 
 9 
10 class Dog(Animal):
11     def eat(self):
12         pass
13 
14 
15 Dog()
16 
17 # 输出
18 '''
19 
20 '''

 

Dog类汇总没有eat()方法

 1 from abc import ABC, abstractmethod
 2 
 3 
 4 class Animal(ABC):
 5     @abstractmethod
 6     def eat(self):
 7         pass
 8 
 9 
10 class Dog(Animal):
11     pass
12 
13 
14 Dog()
15 
16 # 输出
17 '''
18 Traceback (most recent call last):
19   File "C:/test.py", line 14, in <module>
20     Dog()
21 TypeError: Can't instantiate abstract class Dog with abstract methods eat
22 '''