Python nested function

Nested function by decorator

Nested function

Functions can be nested. Instead of laying functions out one-dimensionally, you can build complex composite function structures.

Via decorator

Function structures that would be described very verbosely the traditional way can be expressed simply through decorators.

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def start(func):
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    def inner_func(*args, **kwargs):
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        print("*" * 30)
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        func(*args, **kwargs)
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        print("*" * 30)
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    return inner_func
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def percent(func):
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    def inner_func(*args, **kwargs):
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        print("%" * 30)
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        func(*args, **kwargs)
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        print("%" * 30)
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    return inner_func
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@start
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@percent
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def printer(msg):
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    print(msg)
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printer('haha')
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******************************
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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haha
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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******************************

ref : https://velog.io/@inyong_pang/Python-Nested-Function-2wk42jt94r