stackoverflow 中 How to make a chain of function decorators?( https://stackoverflow.com/questions/739654/how-to-make-a-chain-of-function-decorators )中,最高票答案(目前为 3560 票)的“ Let ’ s practice: decorating a decorator ”部分第一个装饰器的具体作用是什么?请详细讲一下。
该装饰器如下:
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def decorator_with_args(decorator_to_enhance):
# We use the same trick we did to pass arguments
def decorator_maker(*args, **kwargs):
# We create on the fly a decorator that accepts only a function
# but keeps the passed arguments from the maker.
def decorator_wrapper(func):
# We return the result of the original decorator, which, after all,
# IS JUST AN ORDINARY FUNCTION (which returns a function).
# Only pitfall: the decorator must have this specific signature or it won't work:
return decorator_to_enhance(func, *args, **kwargs)
return decorator_wrapper
return decorator_maker