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From: John Gordon <gordon@panix.com>
Newsgroups: comp.lang.python
Subject: Re: binary key in dictionary
Date: Wed, 31 Jul 2013 14:26:27 +0000 (UTC)
Organization: PANIX Public Access Internet and UNIX, NYC
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In <9004a556-958f-4d1d-81a7-4d1b731348c5@googlegroups.com> cerr <ron.eggler@gmail.com> writes:

> Traceback (most recent call last):
>   File "gateway.py", line 2485, in <module>
>     main()
>   File "gateway.py", line 2459, in main
>     cloud_check()
>   File "gateway.py", line 770, in cloud_check
>     gnstr_dict[src] = gn_from_cloud(curr_mac)
>   File "gateway.py", line 2103, in gn_from_cloud
>     tmpgndict[binmac] += "HELLO"
> KeyError: '\x04\xeeu'

You're not assigning to tmpgndict[binmac]; you're appending to it.  This
requires that tmpgndict[binmac] already exists, which it does not.

Make sure that tmpgndict[binmac] exists before you try appending to it.

-- 
John Gordon                   A is for Amy, who fell down the stairs
gordon@panix.com              B is for Basil, assaulted by bears
                                -- Edward Gorey, "The Gashlycrumb Tinies"