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From: Lele Gaifax <lele@metapensiero.it>
Subject: Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte
Date: Fri, 05 Jul 2013 09:06:22 +0200
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References: <kr3c7k$tjs$2@news.grnet.gr> <n3tfaa-eqh.ln1@satorlaser.homedns.org> <kr3jai$jn0$4@news.grnet.gr> <pan.2013.07.05.00.06.41.617000@nowhere.com> <kr5qdh$t82$2@news.grnet.gr>
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Xref: csiph.com comp.lang.python:49932

Νίκος Gr33k <nikos@superhost.gr> writes:

> try:
> 	host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0]
> except Exception as e:
> 	host = "Reverse DNS Failed"
>
> How can the above code not be able to reeverse dns any more and it
> falls back to  the failed string?

The only way to know is actually printing out the exception, either to
stderr, or better using the logging facility, as I suggested.

FYI, your code above is (almost) exactly equivalent to the simpler

    try:
    	host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0]
    except:
    	host = "Reverse DNS Failed"

ciao, lele.
-- 
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it  |                 -- Fortunato Depero, 1929.