What is the application scenario of the Python decorator

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Description

1. Decoration is essentially a Python function that enables other functions to add additional functionality without any code changes. With decoration, we can extract a lot of the same code that has nothing to do with the function and continue to reuse it.

Application scenario

2. It includes inserting logs, performance testing, transaction processing, caching and permission verification.

Example

# decorator # func refers to the function def decorator (func): def wrapper (* args, * * kwargs): # execution function internal logic print time print (time.time (), args, kwargs) # execute the call function logic print different parameters func (* args) * * kwargs) return wrapper# one parameter @ decoratordef function (param): print ('function: this is decorator' + param) # two parameters @ decoratordef function1 (param1, param2): print ('function1: this is decorator' + param1) print ('function1: this is decorator' + param2) # three parameters (variable parameters) @ decoratordef function2 (param1, param2 * * kwargs): print ('function2: this is decorator' + param1) print ('function2: this is decorator' + param2) print (kwargs) function ('param') function1 (' param1', 'param2') function2 (' param1', 'param2', Xerox 1 Lecture 2 Magazine 3) above are all the contents of the article "what is the application scenario of Python decorator" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.