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

Groups > comp.lang.python > #32510

Re: Negative array indicies and slice()

Path csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!ecngs!feeder2.ecngs.de!newsfeed.freenet.ag!news2.euro.net!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 0.000
X-Spam-Evidence '*H*': 1.00; '*S*': 0.00; 'interpreter': 0.04; 'attribute': 0.05; 'method.': 0.05; '"c"': 0.07; 'api': 0.09; 'python': 0.09; 'subject:()': 0.09; 'stored': 0.10; 'static': 0.13; ':-)': 0.13; '.py': 0.16; 'code?': 0.16; 'comparisons,': 0.16; 'discussion.': 0.16; 'members?': 0.16; 'oct': 0.16; 'pymemberdef': 0.16; 'subject:array': 0.16; 'tuples,': 0.16; '{0}': 0.16; 'wrote:': 0.17; 'comparing': 0.17; 'appears': 0.18; 'bit': 0.21; 'struct': 0.22; 'tuples': 0.22; 'defined': 0.22; 'header:In-Reply-To:1': 0.25; 'am,': 0.27; 'andrew': 0.27; 'start,': 0.27; 'message-id:@mail.gmail.com': 0.27; 'interface': 0.27; 'source': 0.29; 'received:209.85.215.46': 0.30; 'code': 0.31; 'implement': 0.32; 'file': 0.32; 'legacy': 0.33; 'to:addr :python-list': 0.33; 'received:google.com': 0.34; 'done': 0.34; 'mapping': 0.35; 'pm,': 0.35; 'received:209.85': 0.35; 'but': 0.36; 'level': 0.37; 'received:209': 0.37; 'data': 0.37; 'subject:: ': 0.38; 'copying': 0.38; 'mean': 0.38; 'skip:o 20': 0.38; 'to:addr:python.org': 0.39; 'step': 0.39; 'header:Received:5': 0.40; '30,': 0.62; 'mentioned': 0.63; 'step),': 0.84; 'stop,': 0.84; 'to:name:python': 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=9lleG1g4XGN6jpot20G9UkgmQ9b6234E4gjVZFJj41w=; b=dfsVchjveQM5ZTytbAY/Wb8Z1kZS6yisZLOM90WY1llGkbugZiA/gxcbG6AoUz9oA4 +nYQoEwpkpAs9mN5dJqvIBq6NWFGTWXTifKsbLgRbonK3LvuKSJ4gCx5D91uYA274YR4 nLk7lu+7VaPAJnrtK4UpUAvQc05KyWoYiZIDm25e+gIdLIEUVqGJ2QmWPbS30oFpPAW5 LwXvDJw7BzTWT6CVE3kxW7BjahAjYKeR32R0KeAtTK5t1h3dPeXqwTpXucOrhSmsZ0Vw yrSME9qUOjiLESnAtsoJFPb4Jten29LMNSeZVwR0bPVx+len5GnkojA2Ivk4cSpRVLPt tcSg==
MIME-Version 1.0
In-Reply-To <CALwzidk-hAjcdPfr4dN0tuhCmH=k8esHPL4KT72DcCyaMQ5YGg@mail.gmail.com>
References <6998a955-7b34-4f4f-b8d6-62d1028f7561@googlegroups.com> <mailman.2986.1351482209.27098.python-list@python.org> <4c024364-84df-403b-8b9e-4a4c8f06121c@googlegroups.com> <mailman.2991.1351484760.27098.python-list@python.org> <cd108b9d-e951-463e-8e50-a5a024a27c7f@googlegroups.com> <508e6649$0$29967$c3e8da3$5496439d@news.astraweb.com> <508E1BC9.3000308@r3dsolutions.com> <CAPTjJmo3uK0Hfu4h78AkM6BPXXuU9sMuc74QeKFrW4jp54MGMg@mail.gmail.com> <508EC428.5080808@r3dsolutions.com> <CALvWhxvJYfSatk7wg8zcBUHm5rHqeqqJss=N2vjCShGy9XoD5A@mail.gmail.com> <CALwzid=5xkJ-SjzvHDStdGSnwHV-u+_QjZJLNJ8+tAs_L0k-qA@mail.gmail.com> <CALwzid=YUQt_PRMjA1rzFw=_0S+e7CxFfy3junuH_iD8+ypCQw@mail.gmail.com> <508FFCD6.3010305@stoneleaf.us> <CALwzidnsn=84j9t8JVgyUgKadigYccMfHo80veq0XBdtC3Sgww@mail.gmail.com> <508FE24E.1060501@r3dsolutions.com> <CALwzidk-hAjcdPfr4dN0tuhCmH=k8esHPL4KT72DcCyaMQ5YGg@mail.gmail.com>
From Ian Kelly <ian.g.kelly@gmail.com>
Date Tue, 30 Oct 2012 16:02:06 -0600
Subject Re: Negative array indicies and slice()
To Python <python-list@python.org>
Content-Type text/plain; charset=ISO-8859-1
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.3109.1351634558.27098.python-list@python.org> (permalink)
Lines 24
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1351634559 news.xs4all.nl 6920 [2001:888:2000:d::a6]:35595
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:32510

Show key headers only | View raw

On Tue, Oct 30, 2012 at 3:55 PM, Ian Kelly <ian.g.kelly@gmail.com> wrote:
> On Tue, Oct 30, 2012 at 8:21 AM, Andrew Robinson
> <andrew3@r3dsolutions.com> wrote:
>> D'Apriano mentioned the named values, start, stop, step in a slice() which
>> are an API and legacy issue;  These three names must also be stored in the
>> interpreter someplace.  Since slice is defined at the "C" level as a struct,
>> have you already found these names in the source code (hard-coded), or are
>> they part of a .py file associated with the interface to the "C" code?
>
> You mean the mapping of Python attribute names to C struct members?
> That's in sliceobject.c:
>
> static PyMemberDef slice_members[] = {
>     {"start", T_OBJECT, offsetof(PySliceObject, start), READONLY},
>     {"stop", T_OBJECT, offsetof(PySliceObject, stop), READONLY},
>     {"step", T_OBJECT, offsetof(PySliceObject, step), READONLY},
>     {0}
> };

Note that the slice API also includes the slice.indices method.

They also implement rich comparisons, but this appears to be done by
copying the data to tuples and comparing the tuples, which is actually
a bit ironic considering this discussion. :-)

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

Thread

Negative array indicies and slice() andrewr3mail@gmail.com - 2012-10-28 20:12 -0700
  Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-28 21:42 -0600
    Re: Negative array indicies and slice() andrewr3mail@gmail.com - 2012-10-28 21:00 -0700
      Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-28 22:25 -0600
        Re: Negative array indicies and slice() Andrew <andrewr3mail@gmail.com> - 2012-10-29 00:54 -0700
          Re: Negative array indicies and slice() Chris Rebert <clp2@rebertia.com> - 2012-10-29 01:18 -0700
          Re: Negative array indicies and slice() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-29 11:19 +0000
            Re: Negative array indicies and slice() Chris Angelico <rosuav@gmail.com> - 2012-10-29 22:32 +1100
            Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-28 21:52 -0700
            Re: Negative array indicies and slice() Chris Angelico <rosuav@gmail.com> - 2012-10-29 23:40 +1100
              Re: Negative array indicies and slice() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-29 22:02 +0000
            Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-28 23:01 -0700
              Re: Negative array indicies and slice() Roy Smith <roy@panix.com> - 2012-10-29 09:52 -0400
                Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-29 08:20 -0700
                Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-29 17:01 -0600
                Re: Negative array indicies and slice() Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2012-10-30 00:04 +0000
                Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-29 16:54 -0700
                Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-30 02:15 -0600
            Re: Negative array indicies and slice() Chris Angelico <rosuav@gmail.com> - 2012-10-30 00:53 +1100
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-29 11:09 -0600
            Re: Negative array indicies and slice() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-29 22:14 +0000
            Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-29 08:42 -0700
              Re: Negative array indicies and slice() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-30 00:02 +0000
                Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-29 12:34 -0700
                Re: Negative array indicies and slice() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-30 08:17 +0000
                Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-30 08:47 -0700
                Re: Negative array indicies and slice() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-10-30 23:48 +0000
                Re: Negative array indicies and slice() Michael Torrie <torriem@gmail.com> - 2012-10-30 23:29 -0600
                Re: Negative array indicies and slice() Michael Torrie <torriem@gmail.com> - 2012-10-29 23:53 -0600
                Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-29 17:04 -0700
            Re: Negative array indicies and slice() Chris Angelico <rosuav@gmail.com> - 2012-10-30 09:55 +1100
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-29 17:07 -0600
              Re: Negative array indicies and slice() Roy Smith <roy@panix.com> - 2012-10-29 19:24 -0400
                Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-29 17:43 -0600
                Re: Negative array indicies and slice() Roy Smith <roy@panix.com> - 2012-10-29 20:17 -0400
                Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-29 18:05 -0600
            Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-29 11:00 -0700
            Re: Negative array indicies and slice() Chris Kaynor <ckaynor@zindagigames.com> - 2012-10-29 18:49 -0700
            Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-29 15:39 -0700
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-29 23:55 -0600
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-30 00:51 -0600
            Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-29 17:17 -0700
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-30 01:21 -0600
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-30 01:32 -0600
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-30 02:46 -0600
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-30 12:02 -0600
            Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-30 07:21 -0700
            Re: Negative array indicies and slice() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-10-30 21:33 +0000
              Re: Negative array indicies and slice() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-31 10:07 +0000
                Re: Negative array indicies and slice() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-10-31 16:01 +0000
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-30 15:47 -0600
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-30 15:55 -0600
            Re: Negative array indicies and slice() Chris Angelico <rosuav@gmail.com> - 2012-10-31 09:00 +1100
            Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-30 16:02 -0600
            Re: Negative array indicies and slice() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-10-30 23:30 +0000
          Re: Negative array indicies and slice() Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-29 11:27 -0600
          Re: Negative array indicies and slice() Andrew Robinson <andrew3@r3dsolutions.com> - 2012-10-29 16:33 -0700
        Re: Negative array indicies and slice() Andrew <andrewr3mail@gmail.com> - 2012-10-29 00:54 -0700
    Re: Negative array indicies and slice() andrewr3mail@gmail.com - 2012-10-28 21:00 -0700
    Re: Negative array indicies and slice() Andrew <andrewr3mail@gmail.com> - 2012-10-28 21:09 -0700
      Re: Negative array indicies and slice() alex23 <wuwei23@gmail.com> - 2012-10-28 21:44 -0700
        Re: Negative array indicies and slice() andrewr3mail@gmail.com - 2012-10-29 01:24 -0700
          Re: Negative array indicies and slice() Chris Rebert <clp2@rebertia.com> - 2012-10-29 01:37 -0700
            Re: Negative array indicies and slice() andrewr3mail@gmail.com - 2012-10-29 01:59 -0700
              Re: Negative array indicies and slice() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-10-29 09:36 +0000
              Re: Negative array indicies and slice() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-29 10:34 +0000
            Re: Negative array indicies and slice() andrewr3mail@gmail.com - 2012-10-29 01:59 -0700
      Re: Negative array indicies and slice() Paul Rubin <no.email@nospam.invalid> - 2012-10-28 22:14 -0700
        Re: Negative array indicies and slice() andrewr3mail@gmail.com - 2012-10-29 01:08 -0700
          Re: Negative array indicies and slice() Chris Rebert <clp2@rebertia.com> - 2012-10-29 01:26 -0700
    Re: Negative array indicies and slice() Andrew <andrewr3mail@gmail.com> - 2012-10-28 21:09 -0700
  Re: Negative array indicies and slice() MRAB <python@mrabarnett.plus.com> - 2012-10-29 03:45 +0000
  Re: Negative array indicies and slice() 88888 Dihedral <dihedral88888@googlemail.com> - 2012-11-01 18:08 -0700

csiph-web