Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!us.feeder.erje.net!news2.arglkargh.de!newsfeed.fsmpi.rwth-aachen.de!weretis.net!feeder4.news.weretis.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed3a.news.xs4all.nl!xs4all!news.tele.dk!news.tele.dk!small.news.tele.dk!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; 'subject:: [': 0.04; 'subject:Python': 0.06; 'definition,': 0.09; 'function,': 0.09; 'instance.': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'subject:method': 0.09; 'subject:set': 0.09; '+1.': 0.16; 'descriptor': 0.16; 'factory,': 0.16; 'overriding': 0.16; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-ipconnect.de': 0.16; 'subject:Dev': 0.16; 'wrote:': 0.18; 'subject:] ': 0.20; 'creating': 0.23; 'header:User-Agent:1': 0.23; 'instance,': 0.24; 'looks': 0.24; 'header:X-Complaints-To:1': 0.27; 'function': 0.29; 'correct': 0.29; 'possibility': 0.29; 'writes:': 0.31; 'class': 0.32; 'implemented': 0.33; 'really': 0.36; 'method': 0.36; 'charset:us-ascii': 0.36; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'either': 0.39; 'received:org': 0.40; 'john': 0.61; 'received:217': 0.63; 'real': 0.63; 'different': 0.65; 'within': 0.65; 'ethan': 0.84; 'furman': 0.84; 'positively': 0.84; 'absolutely': 0.87 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: dieter Subject: Re: [Python-Dev] Dinamically set __call__ method Date: Fri, 07 Nov 2014 07:59:56 +0100 References: <545919B6.7040007@stoneleaf.us> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Gmane-NNTP-Posting-Host: pd9e0a3cf.dip0.t-ipconnect.de User-Agent: Gnus/5.1008 (Gnus v5.10.8) XEmacs/21.4.22 (linux) Cancel-Lock: sha1:RowauwFJn91wi1WQi3QHiQ2vGRs= 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: 14 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1415343612 news.xs4all.nl 2969 [2001:888:2000:d::a6]:37720 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:80352 John Ladasky writes: > On Tuesday, November 4, 2014 11:12:31 AM UTC-8, Ethan Furman wrote: > >> If you really absolutely positively have to have the signature be correct for each instance, you may to either look at a >> function creating factory, a class creating factory, or a meta-class. > > +1. Overriding __call__() within the class definition, over and over again, with different function, looks awkward to me. A possibility to get the original approach implemented looks like: make "__call__" a descriptor on the class which looks up the real method on the instance.