Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #53385

Re: argparse - specify order of argument parsing?

Path csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!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; 'arguments': 0.09; 'iterate': 0.09; 'solution,': 0.09; 'subject:parsing': 0.09; '*before*': 0.16; '>on': 0.16; 'although,': 0.16; 'alvarez': 0.16; 'from:addr:cs': 0.16; 'from:addr:zip.com.au': 0.16; 'from:name:cameron simpson': 0.16; 'message-id:@cskk.homeip.net': 0.16; 'received:211.29': 0.16; 'received:211.29.132': 0.16; 'received:cskk.homeip.net': 0.16; 'received:homeip.net': 0.16; 'received:optusnet.com.au': 0.16; 'received:syd.optusnet.com.au': 0.16; 'reedy': 0.16; 'simpson': 0.16; 'subject:argparse': 0.16; 'wrote:': 0.18; 'variable': 0.18; 'first.': 0.19; 'options.': 0.19; 'user.': 0.19; 'header:User-Agent:1': 0.23; 'config': 0.24; 'specify': 0.24; 'cheers,': 0.24; 'environment': 0.24; 'options': 0.25; 'first,': 0.26; 'header:In-Reply-To:1': 0.27; "i'm": 0.30; "skip:' 10": 0.31; 'invoke': 0.31; 'file': 0.32; 'option': 0.32; 'could': 0.34; 'there': 0.35; 'received:com.au': 0.36; 'sequence': 0.36; 'charset:us-ascii': 0.36; 'subject:?': 0.36; 'turn': 0.37; 'received:211': 0.38; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'expect': 0.39; 'aside': 0.39; 'to:addr:python.org': 0.39; 'remove': 0.60; 'content-disposition:inline': 0.62; 'forward': 0.65; 'commercial': 0.71; 'eduardo': 0.84
Date Sun, 1 Sep 2013 09:44:56 +1000
From Cameron Simpson <cs@zip.com.au>
To python-list@python.org
Subject Re: argparse - specify order of argument parsing?
MIME-Version 1.0
Content-Type text/plain; charset=us-ascii
Content-Disposition inline
In-Reply-To <kvtbvr$ucq$2@ger.gmane.org>
User-Agent Mutt/1.5.21 (2010-09-15)
References <kvtbvr$ucq$2@ger.gmane.org>
X-Optus-CM-Score 0
X-Optus-CM-Analysis v=2.1 cv=bpB1Wiqi c=1 sm=1 tr=0 a=YuQlxtEQCowy2cfE5kc7TA==:117 a=YuQlxtEQCowy2cfE5kc7TA==:17 a=ZtCCktOnAAAA:8 a=PO7r1zJSAAAA:8 a=LcaDllckn3IA:10 a=GJwq_a9B6GkA:10 a=kj9zAlcOel0A:10 a=vrnE16BAAAAA:8 a=8AHkEIZyAAAA:8 a=wtzmShFqDJsA:10 a=bbgiQaK_SnmG6Yv59sUA:9 a=CjuIK1q_8ugA:10
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.430.1377994347.19984.python-list@python.org> (permalink)
Lines 28
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1377994347 news.xs4all.nl 15912 [2001:888:2000:d::a6]:33670
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:53385

Show key headers only | View raw

On 31Aug2013 14:17, Terry Reedy <tjreedy@udel.edu> wrote:
| On 8/31/2013 2:13 PM, Terry Reedy wrote:
| >On 8/31/2013 1:11 PM, Eduardo Alvarez wrote:
| >>When using argparse, is there a way to specify in what order arguments
| >>get parsed?
| >
| >I expect argparse to forward iterate the sequence of arguments that it
| >receives.
| 
| Aside from the environment variable solution, you could search
| sys.argv for 'config=filename' and remove it and process it *before*
| you invoke argparse.

Although, speaking for myself, I like options to have effect as encountered:

  some-cmd -a --no-foo

Would turn on "all" options then turn off "foo". Hard to do if you look for
"more important" options and then less important options.

I'm personally against out-of-order option handling; it confuses things for the user.
If you (as the user) need the config file to be known first, put it first.

Cheers,
-- 
Cameron Simpson <cs@zip.com.au>

You wouldn't... ...but you KNOW you could.      - Original V65 Commercial

Back to comp.lang.python | Previous | Next | Find similar | Unroll thread

Thread

Re: argparse - specify order of argument parsing? Cameron Simpson <cs@zip.com.au> - 2013-09-01 09:44 +1000

csiph-web