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**kwargs gives you the ability to handle named or keyword arguments that you have not defined in advance.

Simple function: code:
         
Output:         
         

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Use decorators: code:
         
Output:         
         

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Create a new folder and then copy all files from a folder to the new folder and rename the file, and then open the file. If the folder exists, then no file will be copied, but the file will still be opened. Code:
        
Input:        
                
Output 1:
               
Output 2:
        

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Access a function variable from outside with a function decorator (but makes the code hard to maintain): Code:
         
Output: