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

Groups > comp.lang.python > #89584

Re: Lucky numbers in Python

Path csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!1.eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path <ian.g.kelly@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.027
X-Spam-Evidence '*H*': 0.95; '*S*': 0.00; 'subject:Python': 0.06; 'element': 0.07; '[1,': 0.09; 'cest': 0.09; 'omit': 0.09; 'slices': 0.09; 'bug': 0.12; 'doing,': 0.16; 'slice,': 0.16; ':-)': 0.16; 'wrote:': 0.18; 'wed,': 0.18; 'this?': 0.23; 'error': 0.23; 'deleted.': 0.24; 'skip': 0.24; 'wednesday': 0.24; 'values': 0.27; 'header:In-Reply-To:1': 0.27; 'message-id:@mail.gmail.com': 0.30; 'concise': 0.31; 'subject:numbers': 0.31; 'probably': 0.32; 'supposed': 0.32; 'received:google.com': 0.35; 'list': 0.37; 'clear': 0.37; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'to:addr:python.org': 0.39; 'deleting': 0.60; 'ian': 0.60; 'middle': 0.60; 'negative': 0.60; 'term': 0.63; 'more': 0.64; '(5)': 0.74; 'ranges': 0.74; '2015': 0.84; 'clearer': 0.84; 'faster.': 0.84
DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=7nF65qM+2+Gimzjtaybq+7gv8N/SFOkOpHpF6gVEiDc=; b=FUi6dgHcmcW43V87GXJXB70vOWTN9UxIXk5u826eel/TWaqyPkMnyHCb4LEIWdmwvb srqyIkhEo21BumlHRGJ6kd5aAtFreKRkHY5qZDRdaSAWVjxQNW9qPVg3TChdeY9Y0NHr aLqc1dBTyRAm3UOXXoTzi7TINB03DjPo26hlldtuPl/0dY6L1wI6XOcQU2a9ZqdYJKN1 HuHMc/oYHKJacC6cnW7rmFV4NJpli9iQHe1CWPEcI/6nyBpa1CgJHIt/zqx+iOrpwuBe 9EitQbFjic5VgLT6IFfvtdQIjclZCqiv/OFk50R+QkAgGDJ5gu+UC79+loVXCBaAvpBL V1gQ==
X-Received by 10.107.136.89 with SMTP id k86mr1689245iod.63.1430347163763; Wed, 29 Apr 2015 15:39:23 -0700 (PDT)
MIME-Version 1.0
In-Reply-To <87d22mbod7.fsf@Equus.decebal.nl>
References <87lhhabxod.fsf@Equus.decebal.nl> <mailman.95.1430337506.3680.python-list@python.org> <87d22mbod7.fsf@Equus.decebal.nl>
From Ian Kelly <ian.g.kelly@gmail.com>
Date Wed, 29 Apr 2015 16:38:43 -0600
Subject Re: Lucky numbers in Python
To Python <python-list@python.org>
Content-Type text/plain; charset=UTF-8
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.20+
Precedence list
List-Id General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe <https://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 <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups comp.lang.python
Message-ID <mailman.103.1430347166.3680.python-list@python.org> (permalink)
Lines 21
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1430347166 news.xs4all.nl 2850 [2001:888:2000:d::a6]:58101
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:89584

Show key headers only | View raw

On Wed, Apr 29, 2015 at 3:45 PM, Cecil Westerhof <Cecil@decebal.nl> wrote:
> Op Wednesday 29 Apr 2015 21:57 CEST schreef Ian Kelly:
>> And although it's not clear to me what this is supposed to be doing,
>> you probably no longer need the middle term if the intention is to
>> continue deleting all the way to the end of the list (if it is then
>> I think you have a bug in the existing implementation, since the
>> last item in the list can never be deleted).
>
> What do you mean by this? Executing:
>     lucky_numbers(5)
> gives:
>     [1, 3]
>
> So the last element (5) is deleted.

Off by one error on my part. This is why negative skip values on
ranges and slices are not recommended: they're confusing. :-)

In that case you can definitely omit the middle term of the slice,
which will be both more concise and clearer in intent, though probably
not significantly faster.

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

Thread

Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-29 20:24 +0200
  Re: Lucky numbers in Python Ian Kelly <ian.g.kelly@gmail.com> - 2015-04-29 13:57 -0600
    Re: Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-29 23:45 +0200
      Re: Lucky numbers in Python Ian Kelly <ian.g.kelly@gmail.com> - 2015-04-29 16:38 -0600
        Re: Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 02:01 +0200
          Re: Lucky numbers in Python Ian Kelly <ian.g.kelly@gmail.com> - 2015-04-29 20:55 -0600
            Re: Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 08:34 +0200
      Re: Lucky numbers in Python Chris Kaynor <ckaynor@zindagigames.com> - 2015-04-29 15:56 -0700
    Re: Lucky numbers in Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-04-30 10:11 +1000
      Re: Lucky numbers in Python Ian Kelly <ian.g.kelly@gmail.com> - 2015-04-29 21:08 -0600
  Re: Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 20:55 +0200
    Re: Lucky numbers in Python Dave Angel <davea@davea.name> - 2015-04-30 15:28 -0400

csiph-web