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From: Vito De Tullio <vito.detullio@gmail.com>
Subject: Re: Safely add a key to a dict only if it does not already exist?
Date: Sat, 19 Jan 2013 09:19:03 +0100
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Xref: csiph.com comp.lang.python:37070

Peter Otten wrote:

uhhmm.. I think I misread the example

>>>> d = {}
>>>> d.setdefault(1, 2)
> 2
>>>> d
> {1: 2}
>>>> d.setdefault(1, 3)
> 2
>>>> d
> {1: 2}

yeah, sure it can be useful for the OP...

-- 
ZeD