Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!news-transit.tcx.org.uk!rt.uk.eu.org!newsfeed.xs4all.nl!newsfeed5.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 0.003 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'python:': 0.05; 'decorator': 0.09; 'from:addr:ethan': 0.09; 'from:addr:stoneleaf.us': 0.09; 'from:name:ethan furman': 0.09; 'message-id:@stoneleaf.us': 0.09; 'received:gator410.hostgator.com': 0.09; '~ethan~': 0.09; 'subject:file': 0.12; 'received:72.11': 0.16; 'received:72.11.125': 0.16; 'received:72.11.125.166': 0.16; 'singleton': 0.16; 'subject:define': 0.16; 'subject:import': 0.16; 'traceback.': 0.16; 'wrote:': 0.18; 'file,': 0.19; 'to:2**1': 0.21; "doesn't": 0.22; 'header:In-Reply-To:1': 0.22; 'defined': 0.24; "i'm": 0.26; 'import': 0.27; 'code,': 0.27; 'described': 0.28; 'work.': 0.28; 'class': 0.29; 'subject:?': 0.31; 'implement': 0.32; "can't": 0.32; 'header:User-Agent:1': 0.33; 'to:addr:python-list': 0.34; 'file.': 0.34; 'declared': 0.34; 'post': 0.36; 'file': 0.36; 'using': 0.38; 'why': 0.39; 'to:addr:python.org': 0.40; 'received:websitewelcome.com': 0.64; 'strategy': 0.64; 'received:184': 0.67; 'ali': 0.73; 'around?': 0.84; 'received:67.18.82': 0.84; 'received:gateway14.websitewelcome.com': 0.84; 'saqib': 0.84 Date: Thu, 22 Dec 2011 13:07:34 -0800 From: Ethan Furman User-Agent: Thunderbird 1.5.0.10 (Windows/20070221) MIME-Version: 1.0 To: Saqib Ali , Python Subject: Re: Can't I define a decorator in a separate file and import it? References: <53a106b8-1a2f-4b9d-9cac-d6f7dab01696@q11g2000vbq.googlegroups.com> In-Reply-To: <53a106b8-1a2f-4b9d-9cac-d6f7dab01696@q11g2000vbq.googlegroups.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator410.hostgator.com X-AntiAbuse: Original Domain - python.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - stoneleaf.us X-BWhitelist: no X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: mail.admailinc.com ([192.168.10.136]) [72.11.125.166]:2320 X-Source-Auth: ethan+stoneleaf.us X-Email-Count: 1 X-Source-Cap: dG9idWs7dG9idWs7Z2F0b3I0MTAuaG9zdGdhdG9yLmNvbQ== 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: 16 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1324589676 news.xs4all.nl 6861 [2001:888:2000:d::a6]:50368 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:17754 Saqib Ali wrote: > > I'm using this decorator to implement singleton class in python: > > http://stackoverflow.com/posts/7346105/revisions > > The strategy described above works if and only if the Singleton is > declared and defined in the same file. If it is defined in a different > file and I import that file, it doesn't work. > > Why can't I import this Singleton decorator from a different file? > What's the best work around? Post the code, and the traceback. ~Ethan~