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

Groups > comp.lang.python > #71285

Re: Values and objects

Path csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!rt.uk.eu.org!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path <rosuav@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.031
X-Spam-Evidence '*H*': 0.94; '*S*': 0.00; 'assignment': 0.07; 'cc:addr:python-list': 0.11; 'def': 0.12; 'dict': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'globals.': 0.16; 'ironpython': 0.16; 'scope,': 0.16; 'spam"': 0.16; 'wrote:': 0.18; 'variable': 0.18; 'example': 0.22; 'cc:addr:python.org': 0.22; 'cc:2**0': 0.24; 'shown': 0.26; 'header:In-Reply-To:1': 0.27; 'message-id:@mail.gmail.com': 0.30; '>>>>': 0.31; "d'aprano": 0.31; 'ordinary': 0.31; 'steven': 0.31; 'created': 0.35; 'something': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'method': 0.36; 'pm,': 0.38; 'that,': 0.38; 'does': 0.39; 'remove': 0.60; 'simply': 0.61; "you're": 0.61; "you've": 0.63; 'skip:n 10': 0.64; 'here': 0.66; 'detail.': 0.68; 'to:none': 0.92
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:cc :content-type; bh=l5TaAAEDz1Ag3YTDr0YeuzFDtcAH2IXZEqcmBqAC96s=; b=h5oA9Jr4vFHY5QSxqL3mRvI+Dersj0pgs6JAND9xB2m/fEeifmY31BleZCTYaohpSW h2d4GhhcX2knSSjiZz5pcP5LD5M0F71xPM0jLdWA0ML2qeNBWJP8Rhbuab8J9OPzEsZr +xV9H6S+7LDvPLvpSmaGVWz7jNMZwB+tdOfjTHyrEN4iAWWbaavO63yct7DXYbAQCQTp Rtd8elZbaA5+DhEM9QVtl3q2G6LqLDl58wnMJ0VpdARoxLB/R5xJ5Q+n2kAjiuTfWAmc ys2wC1gJ3R82ZbIQ3e1I1p+gZnKsKVe+h2mcU43zEXOPAMI7zgsOW1PM/rK1so+Nc1zQ JRFA==
MIME-Version 1.0
X-Received by 10.221.58.144 with SMTP id wk16mr16208257vcb.23.1399779004086; Sat, 10 May 2014 20:30:04 -0700 (PDT)
In-Reply-To <536eebc1$0$29980$c3e8da3$5496439d@news.astraweb.com>
References <235C4BFA-9770-481A-9FCF-21C3F036769C@gmail.com> <5368681D.8070602@islandtraining.com> <mailman.9710.1399408799.18130.python-list@python.org> <lkbigv$ban$1@speranza.aioe.org> <mailman.9713.1399419985.18130.python-list@python.org> <lkdt0u$moc$1@speranza.aioe.org> <87ppjpwafk.fsf@elektro.pacujo.net> <536ad8f2$0$29965$c3e8da3$5496439d@news.astraweb.com> <lkjitj$d0c$1@speranza.aioe.org> <87zjiqbmy5.fsf@elektro.pacujo.net> <536d7a7d$0$29980$c3e8da3$5496439d@news.astraweb.com> <9cc0ebf9-dbed-4d3d-91fc-2abb9b0103d0@googlegroups.com> <mailman.9841.1399689216.18130.python-list@python.org> <536dc3f7$0$29980$c3e8da3$5496439d@news.astraweb.com> <mailman.9843.1399706518.18130.python-list@python.org> <536decca$0$29980$c3e8da3$5496439d@news.astraweb.com> <CAPTjJmqynuf6giRvYP5P7SA_g2DH_MhRp-2=w72kLthsFqx74g@mail.gmail.com> <536E799D.6080602@stoneleaf.us> <mailman.9867.1399757236.18130.python-list@python.org> <536eebc1$0$29980$c3e8da3$5496439d@news.astraweb.com>
Date Sun, 11 May 2014 13:30:03 +1000
Subject Re: Values and objects
From Chris Angelico <rosuav@gmail.com>
Cc "python-list@python.org" <python-list@python.org>
Content-Type text/plain; charset=UTF-8
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 <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.9874.1399779013.18130.python-list@python.org> (permalink)
Lines 26
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1399779013 news.xs4all.nl 2843 [2001:888:2000:d::a6]:53917
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:71285

Show key headers only | View raw

On Sun, May 11, 2014 at 1:17 PM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
> But that is an implementation detail. IronPython and Jython use an
> ordinary dict for local variable namespaces, just like globals. Consider
> this example from Jython:
>
>>>> spam = 9999
>>>> def modify(namespace):
> ...     namespace['spam'] = 42
> ...
>>>> def demo():
> ...     modify(locals())
> ...     spam = spam
> ...     return spam
> ...
>>>> demo()
> 42

All you're proving here is that, in some Pythons, locals() is
writeable. What happens if you remove the "spam = spam" line? Would
demo() not then return spam from the global scope, because the
variable does not exist at local scope? Every example you've shown is
simply giving a value to something that you've created by the normal
method of having an assignment inside the function.

ChrisA

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

Thread

Re: Pass variable by reference Ned Batchelder <ned@nedbatchelder.com> - 2014-05-06 16:31 -0400
  Re: Pass variable by reference Mark H Harris <harrismh777@gmail.com> - 2014-05-06 16:00 -0500
    Re: Pass variable by reference Ned Batchelder <ned@nedbatchelder.com> - 2014-05-06 17:27 -0400
    Re: Pass variable by reference Chris Angelico <rosuav@gmail.com> - 2014-05-07 09:46 +1000
      Re: Pass variable by reference Rustom Mody <rustompmody@gmail.com> - 2014-05-06 19:18 -0700
        Re: Pass variable by reference Chris Angelico <rosuav@gmail.com> - 2014-05-07 12:39 +1000
          Re: Pass variable by reference Rustom Mody <rustompmody@gmail.com> - 2014-05-06 19:54 -0700
            Re: Pass variable by reference Steven D'Aprano <steve@pearwood.info> - 2014-05-07 04:59 +0000
      Re: Pass variable by reference Mark H Harris <harrismh777@gmail.com> - 2014-05-07 13:11 -0500
        Re: Pass variable by reference Marko Rauhamaa <marko@pacujo.net> - 2014-05-08 00:22 +0300
          Values and objects [was Re: Pass variable by reference] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-08 01:08 +0000
            Re: Values and objects [was Re: Pass variable by reference] Mark H Harris <harrismh777@gmail.com> - 2014-05-09 16:56 -0500
              Re: Values and objects Marko Rauhamaa <marko@pacujo.net> - 2014-05-10 01:34 +0300
                Re: Values and objects Ben Finney <ben@benfinney.id.au> - 2014-05-10 10:24 +1000
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-10 01:01 +0000
                Re: Values and objects Rustom Mody <rustompmody@gmail.com> - 2014-05-09 19:19 -0700
                Re: Values and objects Chris Angelico <rosuav@gmail.com> - 2014-05-10 12:33 +1000
                Re: Values and objects Rustom Mody <rustompmody@gmail.com> - 2014-05-09 20:05 -0700
                Re: Values and objects Mark H Harris <harrismh777@gmail.com> - 2014-05-09 23:15 -0500
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-10 06:15 +0000
                Re: Values and objects Chris Angelico <rosuav@gmail.com> - 2014-05-10 17:21 +1000
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-10 09:09 +0000
                Re: Values and objects Chris Angelico <rosuav@gmail.com> - 2014-05-10 19:32 +1000
                Re: Values and objects Ethan Furman <ethan@stoneleaf.us> - 2014-05-10 12:10 -0700
                Re: Values and objects MRAB <python@mrabarnett.plus.com> - 2014-05-10 20:22 +0100
                Re: Values and objects Ethan Furman <ethan@stoneleaf.us> - 2014-05-10 12:28 -0700
                Re: Values and objects Terry Reedy <tjreedy@udel.edu> - 2014-05-10 16:16 -0400
                Re: Values and objects Terry Reedy <tjreedy@udel.edu> - 2014-05-10 16:24 -0400
                Re: Values and objects Devin Jeanpierre <jeanpierreda@gmail.com> - 2014-05-10 14:03 -0700
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-11 03:17 +0000
                Re: Values and objects Chris Angelico <rosuav@gmail.com> - 2014-05-11 13:30 +1000
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-11 05:11 +0000
                Re: Values and objects Chris Angelico <rosuav@gmail.com> - 2014-05-11 15:22 +1000
                Re: Values and objects Rustom Mody <rustompmody@gmail.com> - 2014-05-10 22:31 -0700
                Re: Values and objects Marko Rauhamaa <marko@pacujo.net> - 2014-05-11 09:21 +0300
                Re: Values and objects Rustom Mody <rustompmody@gmail.com> - 2014-05-10 23:48 -0700
                Re: Values and objects Marko Rauhamaa <marko@pacujo.net> - 2014-05-11 18:10 +0300
                Re: Values and objects Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2014-05-11 11:26 +0300
                Re: Values and objects Rustom Mody <rustompmody@gmail.com> - 2014-05-11 01:48 -0700
                Re: Values and objects Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2014-05-11 15:22 +0300
                Re: Values and objects Marko Rauhamaa <marko@pacujo.net> - 2014-05-11 18:46 +0300
                Re: Values and objects Marko Rauhamaa <marko@pacujo.net> - 2014-05-11 22:56 +0300
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-11 12:51 +0000
                Re: Values and objects Rustom Mody <rustompmody@gmail.com> - 2014-05-11 07:12 -0700
                Re: Values and objects Ethan Furman <ethan@stoneleaf.us> - 2014-05-10 22:42 -0700
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-11 06:40 +0000
                Re: Values and objects Chris Angelico <rosuav@gmail.com> - 2014-05-11 09:18 +1000
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-11 03:11 +0000
                Re: Values and objects Rotwang <sg552@hotmail.co.uk> - 2014-05-11 14:46 +0100
                Re: Values and objects Ned Batchelder <ned@nedbatchelder.com> - 2014-05-11 14:40 -0400
                Re: Values and objects Rotwang <sg552@hotmail.co.uk> - 2014-05-12 00:06 +0100
                Re: Values and objects Ethan Furman <ethan@stoneleaf.us> - 2014-05-10 18:28 -0700
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-11 07:24 +0000
                Re: Values and objects Chris Angelico <rosuav@gmail.com> - 2014-05-11 11:59 +1000
                Re: Values and objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-11 07:29 +0000
                Re: Values and objects Ethan Furman <ethan@stoneleaf.us> - 2014-05-10 21:46 -0700
                Re: [Python-Dev] Values and objects Chris Angelico <rosuav@gmail.com> - 2014-05-11 16:08 +1000
                Re: Values and objects albert@spenarnc.xs4all.nl (Albert van der Horst) - 2014-05-17 14:26 +0000
                Re: Values and objects Chris Angelico <rosuav@gmail.com> - 2014-05-10 11:58 +1000
                Re: Values and objects Marko Rauhamaa <marko@pacujo.net> - 2014-05-10 10:57 +0300
                Re: Values and objects Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2014-05-10 11:06 +0300
                Re: Values and objects Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-05-10 12:07 -0400
        Re: Pass variable by reference Chris Angelico <rosuav@gmail.com> - 2014-05-08 11:31 +1000
          Re: Pass variable by reference Mark H Harris <harrismh777@gmail.com> - 2014-05-09 17:30 -0500
            Abstractions [was Re: Pass variable by reference] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-10 00:58 +0000
              Re: Abstractions [was Re: Pass variable by reference] Mark H Harris <harrismh777@gmail.com> - 2014-05-09 21:17 -0500
  Re: Pass variable by reference Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-07 01:14 +0000

csiph-web