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From: Ned Batchelder <ned@nedbatchelder.com>
Subject: Re: Loop thru the dictionary with tuples
Date: Sun, 25 May 2014 09:58:04 -0400
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On 5/25/14 8:55 AM, Igor Korot wrote:
> Hi, ALL,
> I have a following data structure:
>
> my_dict[(var1,var2,var3)] = None
> my_dict[(var4,var5,var6)] = 'abc'
>
> What I'm trying to do is this:
>
> for (key,value) in my_dict:
>      #Do some stuff
>
> but I'm getting an error "Too many values to unpack".
>
> What am I doing wrong?
>
> Thank you.
>

You want:

     for key, value in my_dict.items():  # or .iteritems()

Iterating over a dictionary gives you its keys.  items() will give you 
key,value pairs.

-- 
Ned Batchelder, http://nedbatchelder.com