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Beware when you use with metaprogramming goals, subtle piece of data might get "lost": http://apiguy.github.io/blog/2013/06/03/the-dark-side-of-dec...

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There's also Graham Dumpleton's "How you implemented your Python decorator is wrong" blog post - http://blog.dscpl.com.au/2014/01/how-you-implemented-your-py... and the related "Decorators and monkey patching" list http://blog.dscpl.com.au/p/decorators-and-monkey-patching.ht...

The introspection argument is rather difficult... do I intend to see the descriptor of the wrapped function or the signature of the wrapper? In the case of stacked decorators it can get a little murky.

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