Path: csiph.com!usenet.pasdenom.info!gegeweb.org!usenet-fr.net!nerim.net!novso.com!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.02; 'causing': 0.04; 'interpreter': 0.05; 'context': 0.07; 'defines': 0.09; 'overwrite': 0.09; 'segfault.': 0.09; 'so?': 0.09; 'variables.': 0.09; 'python': 0.11; 'buggy': 0.16; 'constants.': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'language)': 0.16; "object's": 0.16; 'subject:non': 0.16; 'prevent': 0.16; 'language': 0.16; 'wrote:': 0.18; 'variable': 0.18; 'import': 0.22; 'aug': 0.22; 'mon,': 0.24; 'header:In-Reply- To:1': 0.27; 'point': 0.28; 'am,': 0.29; 'thus': 0.29; "doesn't": 0.30; 'statement': 0.30; 'message-id:@mail.gmail.com': 0.30; 'code': 0.31; 'constant': 0.31; 'ctypes': 0.31; 'received:google.com': 0.35; 'there': 0.35; 'subject:skip:d 10': 0.36; 'subject:?': 0.36; 'changing': 0.37; 'being': 0.38; 'to:addr :python-list': 0.38; 'issue': 0.38; 'to:addr:python.org': 0.39; 'even': 0.60; 'name': 0.63; 'total': 0.65; 'safe': 0.72; 'protect': 0.79; 'idiot': 0.84; 'pardon': 0.84; 'preventing': 0.84; '2013': 0.98 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:to :content-type; bh=kFOEyfpQeNm0hEVgLXkoc0pFatkvzjb1Xy1MBeio/nM=; b=SZr/ZBl2caboXvMPaZjdowPkUyGNF57REwOOJraGL9JKz/rocXVMQDvplliWpfsAO0 kqpmxYJBfy4/N0NehjPf2fetSkJ1MxUgvitd8fazz/9o34KIyLYw+t1wls5J5L66rOzV RwRfF9wLtkHDsU00TX98pPO1Oru4jEQR2z9Fo1a7LLR7Z3QCIealYqlxOf57l1opOmUz lIORMHts81W45u6OXRAW+YmxXux4eu/OtjVl8bkDg+8jhc72NSsNlYbHvo3n7VCwunNt G08YxfbYEmm2QNgwIZHBP+3Y56y6lpaiSz93vlZUtQRz894CB8m/0eKp2J3wVbyw/swg cjLA== MIME-Version: 1.0 X-Received: by 10.52.120.114 with SMTP id lb18mr4392966vdb.23.1376903927533; Mon, 19 Aug 2013 02:18:47 -0700 (PDT) In-Reply-To: <5211DF6C.6030603@rece.vub.ac.be> References: <520f9054$0$30000$c3e8da3$5496439d@news.astraweb.com> <5211C5BD.5040209@rece.vub.ac.be> <5211D464.5090303@rece.vub.ac.be> <5211DF6C.6030603@rece.vub.ac.be> Date: Mon, 19 Aug 2013 10:18:47 +0100 Subject: Re: Importing variables non-deterministic? From: Chris Angelico To: 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 17 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1376903935 news.xs4all.nl 15912 [2001:888:2000:d::a6]:59025 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:52681 On Mon, Aug 19, 2013 at 10:03 AM, Antoon Pardon wrote: > This is irrelevant. That some context defines a constant, and that you > can use a variable with the same name as a constant in python, doesn't > contradict the statement that python (as a language) doesn't has > constants. There is nothing in the language that would prevent buggy > code from changing any of those variables. So from a python point of > views these are just global variables. Just as the struct_global.y was > in the original contribution. And there's nothing preventing a program from using ctypes to overwrite an object's refcount, thus causing a segfault. So? The issue was regarding imports, and it's perfectly safe to import a constant, even if the interpreter doesn't protect you from then being a total idiot and changing it. ChrisA