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>
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

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