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| Newsgroups | comp.lang.python |
| Date | Tue, 22 Nov 2011 09:03:42 -0800 (PST) |
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| Subject | Re: decorators and closures |
| From | 88888 Dihedral <dihedral88888@googlemail.com> |
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On Monday, November 21, 2011 10:44:34 PM UTC+8, Andrea Crotti wrote:
> With one colleague I discovered that the decorator code is always
> executed, every time I call
> a nested function:
>
> def dec(fn):
> print("In decorator")
> def _dec():
> fn()
>
> return _dec
>
> def nested():
> @dec
> def fun():
> print("here")
>
> nested()
> nested()
>
> Will give:
> In decorator
> In decorator
>
> So we were wondering, would the interpreter be able to optimize this
> somehow?
> I was betting it's not possible, but I'm I would like to be wrong :)
I love to use decorators. I did the same things to functions and structures in c long time ago. I think that might be the dark night era in programming in the early 90's long long ago.
Cheers.
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decorators and closures Andrea Crotti <andrea.crotti.0@gmail.com> - 2011-11-21 14:44 +0000 Re: decorators and closures Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-22 03:54 +0000 Re: decorators and closures 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-22 09:03 -0800 Re: decorators and closures 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-22 09:03 -0800
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