Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder7.xlned.com!newsfeed.xs4all.nl!newsfeed4a.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 0.002 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'broken': 0.04; 'explicitly': 0.05; 'subject:bug': 0.07; 'string': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'translation': 0.12; '.........': 0.16; 'abbreviated': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'subject:expression': 0.16; 'subject:possible': 0.16; 'wrote:': 0.18; 'split': 0.19; 'import': 0.22; 'header:User-Agent:1': 0.23; 'errors.': 0.24; "i've": 0.25; 'least': 0.26; '(for': 0.26; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; "d'aprano": 0.31; 'steven': 0.31; 'but': 0.35; 'there': 0.35; 'subject:?': 0.36; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'skip:x 10': 0.40; 'even': 0.60; 'catch': 0.60; 'most': 0.60; 'skip:n 10': 0.64; 'received:109': 0.72; 'repeat': 0.74; 'regexp': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Robin Becker Subject: Re: possible bug in re expression? Date: Mon, 28 Apr 2014 14:06:08 +0100 References: <535A8DB5.4090109@chamonix.reportlab.co.uk> <535e4037$0$29965$c3e8da3$5496439d@news.astraweb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: 109.174.168.73 User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 In-Reply-To: <535e4037$0$29965$c3e8da3$5496439d@news.astraweb.com> 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: 24 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1398690389 news.xs4all.nl 2973 [2001:888:2000:d::a6]:43328 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:70680 On 28/04/2014 12:49, Steven D'Aprano wrote: ...... > > Well, I don't know about "almost any", but at least some broken regexes > will explicitly fail: > > > > py> import re ........ > sre_constants.error: nothing to repeat > > (For brevity I have abbreviated the traceback.) > so there is intent to catch some specification errors. I've abandoned this translation anyhow as all that was intended was to split the string into non-overlapping strings of size at most k. I find this works faster than the regexp even if the regexp is pre-compiled. [p[i:i+k] for i in xrange(0,len(p),k)] -- Robin Becker