Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!rt.uk.eu.org!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <cameron@cskk.homeip.net>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.001
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'default.': 0.09; 'option,': 0.09; 'subject:Why': 0.09; 'subject:module': 0.09; 'cc:addr:python-list': 0.11; 'belongs': 0.16; 'from:addr:cs': 0.16; 'from:addr:zip.com.au': 0.16; 'from:name:cameron simpson': 0.16; 'make,': 0.16; 'message-id:@cskk.homeip.net': 0.16; 'ought': 0.16; 'received:211.29': 0.16; 'received:211.29.132': 0.16; 'received:optusnet.com.au': 0.16; 'received:syd.optusnet.com.au': 0.16; 'simpson': 0.16; 'stupidity': 0.16; 'subject:argparse': 0.16; 'to:addr:pearwood.info': 0.16; 'to:addr:steve+comp.lang.python': 0.16; "to:name:steven d'aprano": 0.16; 'wrote:': 0.18; 'code,': 0.22; 'cc:addr:python.org': 0.22; 'header:User-Agent:1': 0.23; 'config': 0.24; "shouldn't": 0.24; 'cc:2**0': 0.24; 'cc:no real name:2**0': 0.24; 'header:In-Reply- To:1': 0.27; 'raise': 0.29; "d'aprano": 0.31; 'libraries': 0.31; 'shelf': 0.31; 'steven': 0.31; 'framework': 0.33; 'subject:the': 0.34; 'could': 0.34; 'but': 0.35; 'there': 0.35; 'received:com.au': 0.36; 'charset:us-ascii': 0.36; 'subject:?': 0.36; 'should': 0.36; 'application': 0.37; 'received:211': 0.38; 'catch': 0.60; 'content-disposition:inline': 0.62; 'more': 0.64; 'frank': 0.68; 'life.': 0.83; 'hydrogen': 0.84
Date: Fri, 28 Jun 2013 09:34:48 +1000
From: Cameron Simpson <cs@zip.com.au>
To: Steven D'Aprano <steve+comp.lang.python@pearwood.info>
Subject: Re: Why is the argparse module so inflexible?
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <51ccc190$0$29999$c3e8da3$5496439d@news.astraweb.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
References: <51ccc190$0$29999$c3e8da3$5496439d@news.astraweb.com>
X-Optus-CM-Score: 0
X-Optus-CM-Analysis: v=2.0 cv=Q6eKePKa c=1 sm=1 a=wom5GMh1gUkA:10 a=I0cP0X-GMOAA:10 a=kj9zAlcOel0A:10 a=vrnE16BAAAAA:8 a=ZtCCktOnAAAA:8 a=_UKPi1JAgJMA:10 a=kZ7UWmmPAAAA:8 a=K4pBxFx3xxF1dgNFo3MA:9 a=CjuIK1q_8ugA:10 a=pyH5b1fOeEsA:10 a=ChdAjXE5lkUvdteQbhpnkQ==:117
Cc: python-list@python.org
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
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.3945.1372376101.3114.python-list@python.org>
Lines: 18
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1372376101 news.xs4all.nl 15979 [2001:888:2000:d::a6]:58156
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:49352

On 27Jun2013 22:49, Steven D'Aprano <steve+comp.lang.python@pearwood.info> wrote:
| [rant]
| I think it is lousy design for a framework like argparse to raise a 
| custom ArgumentError in one part of the code, only to catch it elsewhere 
| and call sys.exit. At the very least, that ought to be a config option, 
| and off by default.
| 
| Libraries should not call sys.exit, or raise SystemExit. Whether to quit 
| or not is not the library's decision to make, that decision belongs to 
| the application layer. Yes, the application could always catch 
| SystemExit, but it shouldn't have to.

+1
-- 
Cameron Simpson <cs@zip.com.au>

There is more stupidity than hydrogen in the universe, and it has a
longer shelf life.      - Frank Zappa