Path: csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'exception': 0.03; 'args': 0.04; 'explicitly': 0.04; 'guido': 0.05; 'mrab': 0.05; 'none:': 0.05; 'sys': 0.05; '"__main__":': 0.07; '__name__': 0.07; 'msg': 0.07; 'try:': 0.07; 'attribute.': 0.09; 'err:': 0.09; 'msg:': 0.09; 'def': 0.10; '--help"': 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; 'msg):': 0.16; 'received:84.93': 0.16; 'received:84.93.230': 0.16; 'url:thread': 0.16; 'url:weblogs': 0.16; 'usage,': 0.16; 'weird.': 0.16; 'wrote:': 0.17; 'code,': 0.18; 'import': 0.21; '15,': 0.23; 'monday,': 0.23; 'raise': 0.24; 'idea': 0.24; 'header:In-Reply- To:1': 0.25; 'header:User-Agent:1': 0.26; 'skip:> 10': 0.27; "doesn't": 0.28; 'post': 0.28; 'prints': 0.29; 'received:192.168.1.3': 0.29; 'unchanged': 0.29; 'definition': 0.29; 'skip:_ 10': 0.29; 'van': 0.29; 'class': 0.29; 'function': 0.30; 'received:84': 0.32; 'print': 0.32; 'to:addr:python-list': 0.33; 'except': 0.36; 'but': 0.36; 'october': 0.37; 'subject:: ': 0.38; 'gives': 0.39; 'to:addr:python.org': 0.39; 'received:192': 0.39; 'where': 0.40; 'received:192.168': 0.40; 'help': 0.40; 'skip:u 10': 0.60; "you've": 0.61; 'more': 0.63; 'header:Reply- To:1': 0.68; 'url:jsp': 0.71; 'reply-to:no real name:2**0': 0.72; 'reply-to:addr:python.org': 0.84 X-CM-Score: 0.00 X-CNFS-Analysis: v=2.0 cv=YaM/Fntf c=1 sm=1 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=b2nRVtXOy8EA:10 a=ihvODaAuJD4A:10 a=OUOv7kDek9cA:10 a=8nJEP1OIZ-IA:10 a=EBOSESyhAAAA:8 a=8AHkEIZyAAAA:8 a=ej1Y1zsxI-wA:10 a=3hnqvxb7AAAA:8 a=rBqPnQ27-CEGYQqc4RwA:9 a=wPNLvfGTeEIA:10 a=0nF1XD0wxitMEM03M9B4ZQ==:117 X-AUTH: mrabarnett:2500 Date: Mon, 15 Oct 2012 18:34:07 +0100 From: MRAB User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:16.0) Gecko/20121010 Thunderbird/16.0.1 MIME-Version: 1.0 To: python-list@python.org Subject: Re: Exception Messages References: <8b5cb95f-424b-45a8-b19b-42f92f531a75@googlegroups.com> <96889d3a-1217-4743-93b5-f8dd5686eebd@googlegroups.com> In-Reply-To: <96889d3a-1217-4743-93b5-f8dd5686eebd@googlegroups.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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 43 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1350322455 news.xs4all.nl 6974 [2001:888:2000:d::a6]:47264 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:31329 On 2012-10-15 18:18, Wanderer wrote: > On Monday, October 15, 2012 12:34:53 PM UTC-4, MRAB wrote: > >> >> Yes, but you've put the message in msg, and Exception doesn't have that >> >> attribute. >> > > That's weird. I got this Exception class definition idea from this post by Guido van Rostrum, Where he gives this main function to look like > > import sys > import getopt > > class Usage(Exception): > def __init__(self, msg): > self.msg = msg > > def main(argv=None): > if argv is None: > argv = sys.argv > try: > try: > opts, args = getopt.getopt(argv[1:], "h", ["help"]) > except getopt.error, msg: > raise Usage(msg) > # more code, unchanged > except Usage, err: > print >>sys.stderr, err.msg > print >>sys.stderr, "for help use --help" > return 2 > > if __name__ == "__main__": > sys.exit(main()) > > > > > http://www.artima.com/weblogs/viewpost.jsp?thread=4829 > > Note how it explicitly prints err.msg.