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From: Gregory Ewing <greg.ewing@canterbury.ac.nz>
Newsgroups: comp.lang.python
Subject: Re: [Python-Dev] Dinamically set __call__ method
Date: Mon, 10 Nov 2014 00:38:07 +1300
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Ethan Furman wrote:
> And the thing going on is the normal python behavior (in 
> __getattribute__, I believe) of examining the returned attribute to see 
> if it is a descriptor, and if so invoking it.

Only if you look it up through the instance, though.
Normally, if you look up an attribute on a class,
the descriptor protocol doesn't get triggered.

-- 
Greg