Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!us.feeder.erje.net!newsfeed.fsmpi.rwth-aachen.de!news.mixmin.net!rt.uk.eu.org!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <python@mrabarnett.plus.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.054
X-Spam-Evidence: '*H*': 0.90; '*S*': 0.00; 'except:': 0.09; '(valueerror,': 0.16; 'be:': 0.16; 'exception:': 0.16; 'from:addr:mrabarnett.plus.com': 0.16; 'from:addr:python': 0.16; 'from:name:mrab': 0.16; 'message-id:@mrabarnett.plus.com': 0.16; 'valueerror,': 0.16; 'worst': 0.16; 'exception': 0.16; 'wrote:': 0.18; 'aug': 0.22; 'header:User-Agent:1': 0.23; 'header:In-Reply- To:1': 0.27; '-0700,': 0.31; 'bad.': 0.31; "d'aprano": 0.31; 'exceptions': 0.31; 'steven': 0.31; 'fri,': 0.33; 'except': 0.35; 'should': 0.36; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'catch': 0.60; 'subject: / ': 0.60; 'more': 0.64; 'header :Reply-To:1': 0.67; 'reply-to:no real name:2**0': 0.71; 'reply- to:addr:python.org': 0.84; 'subject:Practices': 0.84; '2013': 0.98
X-CM-Score: 0.00
X-CNFS-Analysis: v=2.1 cv=bL0vfpOZ c=1 sm=1 tr=0 a=0nF1XD0wxitMEM03M9B4ZQ==:117 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=0Bzu9jTXAAAA:8 a=0kkAYlmtguIA:10 a=VddLPsGmS1EA:10 a=ihvODaAuJD4A:10 a=OUOv7kDek9cA:10 a=8nJEP1OIZ-IA:10 a=EBOSESyhAAAA:8 a=8AHkEIZyAAAA:8 a=tSAfd5EobTkA:10 a=jg8AGdlBgfvfd5cG4BgA:9 a=wPNLvfGTeEIA:10 a=VQUGSkMCsEoA:10 a=GiSKlUT8QRcA:10
X-AUTH: mrabarnett:2500
Date: Sat, 24 Aug 2013 17:32:39 +0100
From: MRAB <python@mrabarnett.plus.com>
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130801 Thunderbird/17.0.8
MIME-Version: 1.0
To: python-list@python.org
Subject: Re: Exception Handling Practices / Patterns
References: <6446b59c-ff06-4c1b-8c54-79bcb1140be5@googlegroups.com> <52188aa1$0$29986$c3e8da3$5496439d@news.astraweb.com>
In-Reply-To: <52188aa1$0$29986$c3e8da3$5496439d@news.astraweb.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
Reply-To: python-list@python.org
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.197.1377361957.19984.python-list@python.org>
Lines: 27
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1377361957 news.xs4all.nl 16012 [2001:888:2000:d::a6]:34924
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:52942

On 24/08/2013 11:27, Steven D'Aprano wrote:
> On Fri, 23 Aug 2013 22:25:55 -0700, snarf wrote:
[snip]
>> * Using
>> Exception is typically a bad. More specific the better.
>
> Yes, you should always try to catch the specific exceptions you care
> about:
>
>
> # Best
> except ValueError, OverflowError, ZeroDivisionError:
>
That should be:

except (ValueError, OverflowError, ZeroDivisionError):

>
> # Not so good
> except Exception:
>
>
> # Worst
> except:
>
[snip]