Path: csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed4.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 0.015 X-Spam-Evidence: '*H*': 0.97; '*S*': 0.00; 'cpython': 0.05; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'python': 0.11; '2.7': 0.14; '*before*': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'subject:after': 0.16; 'wrote:': 0.18; 'looked': 0.18; 'wed,': 0.18; 'implementing': 0.19; 'seems': 0.21; 'example': 0.22; 'import': 0.22; 'install': 0.23; 'header :User-Agent:1': 0.23; 'alternate': 0.24; 'earlier': 0.24; 'versions': 0.24; 'question': 0.24; 'equivalent': 0.26; 'skip:_ 20': 0.27; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply- To:1': 0.27; 'am,': 0.29; "i'm": 0.30; "skip:' 10": 0.31; 'allows': 0.31; 'this.': 0.32; 'received:fr': 0.33; 'skip:_ 10': 0.34; 'subject:the': 0.34; 'could': 0.34; 'problem': 0.35; 'anybody': 0.35; 'add': 0.35; 'there': 0.35; 'entry': 0.36; 'thanks': 0.36; 'hi,': 0.36; 'project': 0.37; 'to:addr:python- list': 0.38; 'does': 0.39; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'how': 0.40; 'skip:u 10': 0.60; 'read': 0.60; 'ian': 0.60; 'first': 0.61; 'such': 0.63; 'answer.': 0.68; 'default': 0.69; 'received:109': 0.72; 'end.': 0.84; 'gelonida': 0.84; 'subject:add': 0.91 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Gelonida N Subject: Re: how to add custom importer after the normal imports Date: Thu, 09 Oct 2014 14:51:17 +0200 References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: 1-75-190-109.dsl.ovh.fr User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 In-Reply-To: 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: 35 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1412859107 news.xs4all.nl 2906 [2001:888:2000:d::a6]:42342 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:78888 On 10/9/2014 12:44 AM, Ian Kelly wrote: > On Wed, Oct 8, 2014 at 4:53 AM, Gelonida N wrote: >> Hi, >> >> >> I just read about sys.meta_path, which allows to install custom importers >> *BEFORE* the default importers. >> >> However I have a use case where I would like to add a custom importer >> *AFTER* all other import methods have failed. >> >> Does anybody know how to do this. >> >> One way of implementing this would be to add the default importer as first >> entry in sys.meta_path. My only problem is, that I don't know how to create >> a 'default-importer', such that I can add it into sys.meta_path > > As of CPython 3.3 the default importers are already in sys.meta_path, > so you could just add your custom importer to the end. If you need to > support earlier versions or alternate implementations then this may > not be reliable. > thanks for your answer. I'm using Puthon 2.7 for the given project and there sys.meta_path is []. Just for fun I started Python3.3 and looked at it's meta_path, which contained for example _frozen_importlib.PathFinder Unfortunately python 2.7 does not seem to have the package _frozen_importlib So now the question seems to boil down to looking for the 2.7 equivalent of python 3.3's _frozen_importlib.PathFinder