Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <python@mrabarnett.plus.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.011
X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'cpython': 0.05; 'attribute': 0.07; 'suppress': 0.07; 'from:addr:python': 0.09; 'from:addr:mrabarnett.plus.com': 0.16; 'from:name:mrab': 0.16; 'message-id:@mrabarnett.plus.com': 0.16; 'received:84.92': 0.16; 'received:84.92.122': 0.16; 'received:84.92.122.60': 0.16; 'reply- to:addr:python-list': 0.16; '\xe9crit': 0.16; 'written': 0.16; 'wrote:': 0.16; 'extension': 0.21; 'header:In-Reply-To:1': 0.22; 'classes': 0.28; 'received:84': 0.28; 'definition': 0.30; 'class': 0.30; 'error': 0.32; 'implement': 0.32; 'it.': 0.33; 'to:addr :python-list': 0.33; 'header:User-Agent:1': 0.34; 'reply- to:addr:python.org': 0.34; 'certain': 0.35; 'but': 0.37; 'something': 0.37; 'subject:: ': 0.39; 'why': 0.39; 'to:addr:python.org': 0.39; 'choose': 0.61; 'header:Reply-To:1': 0.71; 'reply-to:no real name:2**0': 0.71; 'candide': 0.84; 'limitations,': 0.84; 'subject:types': 0.84
X-CM-Score: 0.00
X-CNFS-Analysis: v=2.0 cv=UovhxpMB c=1 sm=1 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=yj_6LXTI0WAA:10 a=2JhHvAwYMhEA:10 a=OUOv7kDek9cA:10 a=8nJEP1OIZ-IA:10 a=YjMrAwVpWvn66UubOwkA:9 a=wPNLvfGTeEIA:10 a=0nF1XD0wxitMEM03M9B4ZQ==:117
X-AUTH: mrabarnett:2500
Date: Fri, 28 Oct 2011 01:02:52 +0100
From: MRAB <python@mrabarnett.plus.com>
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1
MIME-Version: 1.0
To: python-list@python.org
Subject: Re: __dict__ attribute for built-in types
References: <4ea92dae$0$20639$426a74cc@news.free.fr>	<Xns9F8B7A9C6BEE5duncanbooth@127.0.0.1>	<4ea96437$0$24971$426a74cc@news.free.fr> <87pqhi2gbj.fsf@xemacs.org> <4ea9eb0b$0$637$426a34cc@news.free.fr>
In-Reply-To: <4ea9eb0b$0$637$426a34cc@news.free.fr>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.12
Precedence: list
Reply-To: python-list@python.org
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.2268.1319760625.27778.python-list@python.org>
Lines: 15
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1319760625 news.xs4all.nl 6918 [2001:888:2000:d::a6]:39678
X-Complaints-To: abuse@xs4all.nl
Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:15070

On 28/10/2011 00:36, candide wrote:
> Le 28/10/2011 00:57, Hrvoje Niksic a écrit :
>
>> was used at class definition time to suppress it. Built-in and
>> extension types can choose whether to implement __dict__.
>>
>
> Is it possible in the CPython implementation to write something like this :
>
> "foo".bar = 42
>
> without raising an attribute error ?

No, built-in classes written in C have certain limitations, but why
would you want to do that anyway?