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Date: Mon, 20 Jun 2011 20:37:34 -0700
From: Ethan Furman <ethan@stoneleaf.us>
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To: Spencer Pearson <speeze.pearson@gmail.com>
Subject: Re: Instances' __setitem__ methods
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:8064

Spencer Pearson wrote:
> I was recently trying to implement a dict-like object which would do
> some fancy stuff when it was modified, and found that overriding the
> __setitem__ method of an instance did not act the way I expected. 

The __magic__ methods are only looked up on the class, never the instance.

~Ethan~