Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!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,': 0.01; 'subject:module': 0.04; 'wed,': 0.04; 'foo': 0.09; '>>>': 0.12; 'def': 0.13; 'am,': 0.14; 'wrote:': 0.14; 'except:': 0.16; 'name):': 0.16; 'simulate': 0.16; 'subject:directly': 0.16; 'subject:those': 0.16; 'symbolic': 0.16; 'object,': 0.19; 'cc:no real name:2**0': 0.20; 'cc:2**0': 0.20; 'header:In-Reply-To:1': 0.22; 'cc:addr:python-list': 0.22; 'received:209.85.214.174': 0.23; 'received:mail-iw0-f174.google.com': 0.23; 'skip:_ 20': 0.24; 'pointing': 0.25; 'message-id:@mail.gmail.com': 0.28; 'subject:?': 0.29; 'daniel': 0.29; 'class': 0.29; 'cc:addr:python.org': 0.31; 'points': 0.31; "'a')": 0.31; 'reference': 0.34; 'there': 0.35; 'try:': 0.35; 'skip:o 20': 0.37; 'received:209.85': 0.37; 'received:google.com': 0.38; 'received:209.85.214': 0.39; 'skip:s 30': 0.39; 'could': 0.39; 'received:209': 0.39; 'i.e.': 0.40; 'header:Received:5': 0.40; 'best': 0.60; '2011': 0.62; 'p.s.': 0.65; 'subject:Why': 0.84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=N73/nqIH+glo13RFJa3JETMBB+pLVlyFqXdN/fcBAQ8=; b=oDKv5VUJcP23JnoAaxdxCcmJIQSlH7d0bZstGsx1hVq5twXDslIID3lks4eZQta0Dr 2zNp8gSf36osompmrTH7Ieg2lK2V95I7dOErBLC28AaTdlmIX/vk8xjPK6193VGrLWkp pKFeNHPEnoK262CUTAmArJWWQYiKR3YgG/M1U= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=h5YxCj3GosnV8S1sg2IHBtxmVeXg01aZ1O9lPKUFMI6ZUw5MFjREi5xWO4ff0bxl9W 5MFCMsVu85+MvYc1Dspx5UvCAtf6Ofy1qV5O3hKV3w5PfRW1u5Hb3hxWhLZdRFljzqKs qI1SaeEZAgIfchRj1cjQUVleZ4McmoqKYsZPQ= MIME-Version: 1.0 In-Reply-To: <5299438d-611f-4a63-b1d8-4abe039ad5d4@k3g2000prl.googlegroups.com> References: <5299438d-611f-4a63-b1d8-4abe039ad5d4@k3g2000prl.googlegroups.com> Date: Wed, 4 May 2011 06:55:04 +1100 Subject: Re: Why do directly imported variables behave differently than those attached to imported module? From: Daniel Kluev To: Dun Peal Content-Type: text/plain; charset=ISO-8859-1 Cc: python-list@python.org X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 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: 37 NNTP-Posting-Host: 82.94.164.166 X-Trace: 1304452508 news.xs4all.nl 41114 [::ffff:82.94.164.166]:45143 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:4570 On Wed, May 4, 2011 at 6:23 AM, Dun Peal wrote: > P.S. now I have to ask: is there a symbolic reference in Python, i.e. > a name foo that points to "whatever bar.baz is pointing at"? Well, you could easily simulate that with proxy object, class SymbolicReference(object): def __init__(self, ns, name): self.__ns = ns self.__name = name def __get(self): return self.__ns[self.__name] def __getattribute__(self, attr): try: return object.__getattribute__(self, attr) except: return self.__get().__getattribute__(attr) def __repr__(self): return self.__get().__repr__() def __str__(self): return self.__get().__str__() >>> a = 1 >>> b = SymbolicReference(globals(), 'a') >>> b 1 >>> a = 10 >>> b 10 -- With best regards, Daniel Kluev