Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.freenet.ag!news2.euro.net!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 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'heavily': 0.04; 'except:': 0.07; 'layers': 0.07; 'try:': 0.07; 'python': 0.09; 'assigning': 0.09; 'from:addr:ethan': 0.09; 'from:addr:stoneleaf.us': 0.09; 'from:name:ethan furman': 0.09; 'happen?': 0.09; 'message- id:@stoneleaf.us': 0.09; 'received:184.172': 0.09; 'received:gator410.hostgator.com': 0.09; 'subject:into': 0.09; 'subject:method': 0.09; '~ethan~': 0.09; 'def': 0.10; 'subject:python': 0.11; 'extension': 0.13; 'a():': 0.16; 'py3': 0.16; 'subject: \n ': 0.16; 'subject:class': 0.16; 'unbound': 0.16; 'wrote:': 0.17; 'module': 0.19; 'import': 0.21; 'subject:problem': 0.22; 'work.': 0.23; 'pass': 0.25; 'tried': 0.25; 'header:In-Reply-To:1': 0.25; 'header:User-Agent:1': 0.26; 'am,': 0.27; "doesn't": 0.28; 'all.': 0.28; 'fine': 0.28; 'methods.': 0.29; 'class': 0.29; 'stuff': 0.30; 'to:addr:python- list': 0.33; 'there': 0.35; 'but': 0.36; 'method': 0.36; 'subject:: ': 0.38; 'fact': 0.38; 'some': 0.38; 'to:addr:python.org': 0.39; 'called': 0.39; 'header:Received:5': 0.40; 'times': 0.63; 'our': 0.65; 'received:67.18': 0.65; 'skip:n 30': 0.69; '.....': 0.75; 'dumb': 0.84; 'forward.': 0.84; 'received:gateway14.websitewelcome.com': 0.91 Date: Tue, 26 Feb 2013 12:19:14 -0800 From: Ethan Furman User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: python-list@python.org Subject: Re: python 3 problem: how to convert an extension method into a class Method References: <512CEF0C.3020906@chamonix.reportlab.co.uk> In-Reply-To: <512CEF0C.3020906@chamonix.reportlab.co.uk> 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: yes X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: ([173.12.184.235]) [173.12.184.235]:35028 X-Source-Auth: ethan+stoneleaf.us X-Email-Count: 3 X-Source-Cap: dG9idWs7dG9idWs7Z2F0b3I0MTAuaG9zdGdhdG9yLmNvbQ== 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: 38 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1361911052 news.xs4all.nl 6884 [2001:888:2000:d::a6]:43952 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:40004 On 02/26/2013 09:21 AM, Robin Becker wrote: > In python 2 I was able to improve speed of reportlab using a C extension to optimize some heavily used methods. > > so I was able to do this > > > class A: > ..... > def method(self,...): > .... > > > try: > from extension import c_method > import new > A.method = new.instancemethod(c_method,None,A) > except: > pass > > and if the try succeeds our method is bound as a class method ie is unbound and works fine when I call it. > > In python 3 this doesn't seem to work at all. In fact the new module is gone. The types.MethodType stuff doesn't seem to > work. > > Is there a way in Python 3.3 to make this happen? This particular method is short, but is called many times so adding > python wrapping layers is not a good way forward. Dumb question, but have you tried just assigning it? In Py3 methods are just normal functions... 8<---------------------- class A(): pass A.method = c_method 8<---------------------- -- ~Ethan~