复习装饰器 

 1 def a_new_decorator(a_func):
 2  
 3     def wrapTheFunction():
 4         print("I am doing some boring work before executing a_func()")
 5  
 6         a_func()
 7  
 8         print("I am doing some boring work after executing a_func()")
 9  
10     return wrapTheFunction
11  
12 def a_function_requiring_decoration():
13     print("I am the function which needs some decoration to remove my foul smell")
14  
15 a_function_requiring_decoration()
16 #outputs: "I am the function which needs some decoration to remove my foul smell"
17  
18 a_function_requiring_decoration = a_new_decorator(a_function_requiring_decoration)
19 #now a_function_requiring_decoration is wrapped by wrapTheFunction()
20  
21 a_function_requiring_decoration()
22 #outputs:I am doing some boring work before executing a_func()
23 #        I am the function which needs some decoration to remove my foul smell
24 #        I am doing some boring work after executing a_func()
 1 @a_new_decorator
 2 def a_function_requiring_decoration():
 3     """Hey you! Decorate me!"""
 4     print("I am the function which needs some decoration to "
 5           "remove my foul smell")
 6  
 7 a_function_requiring_decoration()
 8 #outputs: I am doing some boring work before executing a_func()
 9 #         I am the function which needs some decoration to remove my foul smell
10 #         I am doing some boring work after executing a_func()
11  
12 #the @a_new_decorator is just a short way of saying:
13 a_function_requiring_decoration = a_new_decorator(a_function_requiring_decoration)

 

posted @ 2020-07-07 13:35  竹石2020  阅读(128)  评论(0)    收藏  举报