Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder2.hal-mli.net!weretis.net!feeder1.news.weretis.net!feeder.erje.net!newsfeed.xs4all.nl!newsfeed6.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 0.005 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'run-time': 0.05; 'suppose': 0.05; 'imports': 0.07; 'paths': 0.07; 'subject:changing': 0.07; 'python': 0.08; 'am,': 0.12; 'cc:addr :python-list': 0.15; '9:15': 0.16; 'then?': 0.16; 'wrote:': 0.16; 'wed,': 0.17; 'cc:no real name:2**0': 0.21; "doesn't": 0.22; 'feb': 0.22; 'header:In-Reply-To:1': 0.22; 'cc:2**0': 0.25; 'code': 0.25; 'modify': 0.25; 'pm,': 0.26; 'work,': 0.26; 'import': 0.27; 'looks': 0.27; 'importing': 0.28; 'cc:addr:python.org': 0.29; 'actually': 0.32; 'actual': 0.32; 'error.': 0.32; 'modules': 0.32; 'message-id:@gmail.com': 0.33; 'header:User-Agent:1': 0.33; 'there': 0.33; 'eric': 0.34; 'received:209.85.212': 0.34; 'running': 0.35; 'file': 0.35; 'two': 0.37; 'run': 0.37; 'list,': 0.37; 'but': 0.37; 'received:google.com': 0.37; 'could': 0.37; 'some': 0.38; 'received:209.85': 0.38; 'same.': 0.38; 'received:209': 0.39; 'subject:: ': 0.39; 'your': 0.61; 'same,': 0.67; 'works,': 0.68; 'andrea': 0.84; 'snow': 0.91 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=c0/61VqJJXy7mZ9UWrnDJXNIUofb/BF6wqX0egHoU3g=; b=rZ4j+x3iYzDcHZHZaKt2MdOMsJ3MiWxWbIhjKlnXmHVFrR9Vv1dwlijswhksEYPgbC c6nTZAOqLHP8JB80j3lzoqn6ZaFY0MdWsxH9522QPjhQ4fh+mjISHB8KdOxin2d2HJSE YyxXt3lWuW/uA82MTu6REztOqLZ7zaqdEaLO8= Date: Wed, 01 Feb 2012 17:47:22 +0000 From: Andrea Crotti User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0) Gecko/20111224 Thunderbird/9.0.1 MIME-Version: 1.0 To: Eric Snow Subject: Re: changing sys.path References: <4F296509.60607@gmail.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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: 30 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1328118446 news.xs4all.nl 6983 [2001:888:2000:d::a6]:39192 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:19729 On 02/01/2012 05:13 PM, Eric Snow wrote: > On Wed, Feb 1, 2012 at 9:15 AM, Andrea Crotti wrote: >> So suppose I want to modify the sys.path on the fly before running some code >> which imports from one of the modules added. >> >> at run time I do >> sys.path.extend(paths_to_add) >> >> but it still doesn't work and I get an import error. > Make sure you are adding to sys.path the directories that your > packages/modules are in, and not the actual package directories. > During import Python looks for modules/packages _in_ each of the > directories on sys.path, but not _at_ those directories. Yes sure I do this.. > >> If I take these paths and add them to site-packages/my_paths.pth >> everything works, but at run-time the paths which I actually see before >> importing are exactly the same. > You mean sys.path looks exactly the same in the two cases? > > -eric Yes they are exactly the same, because in that file I just write exactly the same list, but when modifying it at run-time it doesn't work, while if at the application start there is this file everything works correctly... That's what really puzzles me.. What could that be then?