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Groups > comp.lang.python > #3547

Re: How to create a (transparent) decorator with status information?

Date 2011-04-19 09:12 +0200
From Timo Schmiade <the_isz@gmx.de>
Subject Re: How to create a (transparent) decorator with status information?
References <mailman.510.1303130820.9059.python-list@python.org> <a61d0b91-a826-4530-b46e-be01d5ed0856@glegroupsg2000goo.googlegroups.com>
Newsgroups comp.lang.python
Message-ID <mailman.553.1303197185.9059.python-list@python.org> (permalink)

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Hey Wayne,

On Mon, Apr 18, 2011 at 04:04:15PM -0700, Wayne Witzel III wrote:
> Going with the object approach, you could use Borg to give yourself the state between instances you mentioned. And since you are using an object, you'll have access to the data without needing to return it from the decorator.
> 
> class StatefulDecorators(object):
>     _state = {}
>     def __new__(cls, *p, **k):
>         self = object.__new__(cls, *p, **k)
>         self.__dict__ = cls._state
>         return self
>             
>     def count_calls(self, function):
>         @functools.wraps(function)
>         def wrapper(*args, **kwargs):
>             try:
>                 self.calls += 1
>             except AttributeError:
>                 self.calls = 1
>             return function(*args, **kwargs)
>         return wrapper

Brilliant! I didn't realize you could use member functions as
decorators, too! That way, you can easily create closures to self,
solving all the problems I was seeing.

Just one question remains now: What is a "Borg" in this context?

Thank you.

Timo

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Thread

Re: How to create a (transparent) decorator with status information? Wayne Witzel III <wwitzel3@gmail.com> - 2011-04-18 16:04 -0700
  Re: How to create a (transparent) decorator with status information? Timo Schmiade <the_isz@gmx.de> - 2011-04-19 09:12 +0200
  Re: How to create a (transparent) decorator with status information? Ian Kelly <ian.g.kelly@gmail.com> - 2011-04-19 08:20 -0600
  Re: How to create a (transparent) decorator with status information? Timo Schmiade <the_isz@gmx.de> - 2011-04-19 17:12 +0200

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