Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!goblin2!goblin.stu.neva.ru!feeder1.cambriumusenet.nl!feed.tweaknews.nl!194.109.133.83.MISMATCH!newsfeed.xs4all.nl!newsfeed4.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 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'scripts': 0.03; 'explicitly': 0.05; 'default.': 0.09; 'option,': 0.09; 'subject:Why': 0.09; 'subject:module': 0.09; '~ethan~': 0.09; 'cc:addr:python-list': 0.11; 'belongs': 0.16; 'command-line': 0.16; 'make,': 0.16; 'ought': 0.16; 'really?': 0.16; 'subject:argparse': 0.16; 'wrote:': 0.18; 'library': 0.18; 'looked': 0.18; 'code,': 0.22; 'cc:addr:python.org': 0.22; '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; 'message-id:@mail.gmail.com': 0.30; 'url:mailman': 0.30; 'easier': 0.31; "d'aprano": 0.31; 'libraries': 0.31; 'steven': 0.31; 'url:python': 0.33; 'framework': 0.33; 'fri,': 0.33; 'subject:the': 0.34; 'could': 0.34; 'but': 0.35; 'received:google.com': 0.35; 'url:listinfo': 0.36; 'subject:?': 0.36; 'url:org': 0.36; 'should': 0.36; 'application': 0.37; 'pm,': 0.38; 'url:mail': 0.40; 'catch': 0.60; 'ethan': 0.84; 'furman': 0.84; '2013': 0.98 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=ry1KxxelyTmWlbwiEkNHnyKA1DVP7aRwpKo/Jmgce5E=; b=y3TGGHi9EioNIyegzqTEVR8BcNQ6O5jZekvsAqOsWqQi4d+X1eCULg0TH+UFuD0Pto 2Vmy0RY5hKTeziWzBl6AaxotTjh7lbyxZtVJpSFTKJeWwCZWPb07FApHuNp7FQVQ99o6 T3LMLnHd4sykgQq5f3H8Fq/OrgrJhPkcFJTSPO4snZUGN/J66G3x7c3xIhkFHHvGsGDE wrS3QQCAZV1v3ijYOSwg6LjhXwt+zDVcaNN+AAvazIs1zay5TM8L/eZND1+CflStPomZ VUNP8uQZHXaPXSbDvJudZWLbv8tdEBS+PP864bs8NwdumsJmz5Unrxus4qeN3U7PDgMj jERA== MIME-Version: 1.0 X-Received: by 10.180.184.12 with SMTP id eq12mr4076644wic.8.1372469997106; Fri, 28 Jun 2013 18:39:57 -0700 (PDT) In-Reply-To: <51CE3A25.7080300@stoneleaf.us> References: <51CC42E3.3070508@gmail.com> <51ccc190$0$29999$c3e8da3$5496439d@news.astraweb.com> <51CE3A25.7080300@stoneleaf.us> Date: Fri, 28 Jun 2013 19:39:57 -0600 Subject: Re: Why is the argparse module so inflexible? From: Modulok To: Ethan Furman Content-Type: multipart/alternative; boundary=001a11c3669ea47acc04e041127e 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 79 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1372470006 news.xs4all.nl 15911 [2001:888:2000:d::a6]:54634 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:49397 --001a11c3669ea47acc04e041127e Content-Type: text/plain; charset=ISO-8859-1 Have you looked into docopt? -Modulok- On Fri, Jun 28, 2013 at 7:36 PM, Ethan Furman wrote: > On 06/27/2013 03:49 PM, Steven D'Aprano 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. >> > > So a library that is explicitly designed to make command-line scripts > easier and friendlier should quit with a traceback? > > Really? > > -- > ~Ethan~ > -- > http://mail.python.org/**mailman/listinfo/python-list > --001a11c3669ea47acc04e041127e Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Have you looked into docopt?

-Mod= ulok-


On Fri, Jun 28, 2013 at 7:36 PM, Ethan Furman <ethan@stoneleaf.us= > wrote:
On 06/27/2013 03:49 PM, Steven D'Aprano = 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<= br> the application layer. Yes, the application could always catch
SystemExit, but it shouldn't have to.

So a library that is explicitly designed to make command-line scripts easie= r and friendlier should quit with a traceback?

Really?

--
~Ethan~
--
http://mail.python.org/mailman/listinfo/python-list

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