Path: csiph.com!usenet.pasdenom.info!gegeweb.org!usenet-fr.net!nerim.net!novso.com!newsfeed.xs4all.nl!newsfeed3a.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 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'else:': 0.03; 'configure': 0.05; 'insert': 0.05; 'bug.': 0.09; 'exercising': 0.09; 'key.': 0.09; 'spaces': 0.09; 'python': 0.11; 'bug': 0.12; 'changes': 0.15; 'recently.': 0.16; 'tab': 0.16; 'tabs': 0.16; 'pushed': 0.16; 'appropriate': 0.16; 'wrote:': 0.18; 'looked': 0.18; 'commit': 0.19; 'thu,': 0.19; 'feb': 0.22; 'tests': 0.22; 'to:name :python-list@python.org': 0.22; 'error': 0.23; 'versions': 0.24; 'question': 0.24; 'script': 0.25; 'header:In-Reply-To:1': 0.27; 'message-id:@mail.gmail.com': 0.30; 'along': 0.30; 'code': 0.31; 'lines': 0.31; 'accidentally': 0.31; 'file': 0.32; 'noticed': 0.34; 'problem': 0.35; 'something': 0.35; 'editor': 0.35; 'received:google.com': 0.35; 'should': 0.36; 'to:addr:python- list': 0.38; 'pm,': 0.38; 'to:addr:python.org': 0.39; 'how': 0.40; 'up,': 0.60; 'email addr:gmail.com': 0.63; 'show': 0.63; 'kind': 0.63; 'of:': 0.68; 'press': 0.70; 'therefore': 0.72; 'fortunately,': 0.84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=mUIOWBD6X/RzTJ21aWoBO/F04ZzDa6gbsluQ045DUX0=; b=wAqKA3+MurAO5yroUPXIYyL6iey9bmACPY75sbu2MLSMub73VUEPa0FxaS0HWfjqBx iKDiVKDTJNyIx+8m2GyRVQHy9Ib/3td9NzuV9grpQNNQ2N6mh6dxSucOC0Wy3a0phmy9 LTaqq7JoCWGNGPNJmkf03qVoHexlhohBEUpotFy/JnoOGxmYUNq95CnRRGONS+vqDBFD A6SOTMWBNPcc3yQ+feIzHcVK8KK8DA8dKGJdwhK2IESfgXDpZrRUyLISvhI+hJoj8JZW ac5NrtW0MCZVWWF82tpnnYe4lCSIhvcUQQgHrf9Qb41oEkMt2N5/eILbwTdHclSQm9/V 4F3w== MIME-Version: 1.0 X-Received: by 10.224.11.196 with SMTP id u4mr15881848qau.4.1391718990279; Thu, 06 Feb 2014 12:36:30 -0800 (PST) In-Reply-To: References: Date: Thu, 6 Feb 2014 15:36:30 -0500 Subject: Re: how to reduce bugs due to incorrect indentation From: Larry Martell To: "python-list@python.org" Content-Type: text/plain; charset=UTF-8 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: 33 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1391719002 news.xs4all.nl 2920 [2001:888:2000:d::a6]:41927 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:65556 On Thu, Feb 6, 2014 at 3:29 PM, Roel Schroeven wrote: > msustik@gmail.com schreef: >> >> I had a bug in a Python script recently. The code in question was >> something along the lines of: >> >> if a == 1: >> x = y >> else: >> x = z >> y = z + y >> z = z + 1 >> >> While editing this file I accidentally pushed TAB on the line with 'y = z >> + y'. >> >> My changes were elsewhere and I did not notice the above one line change >> when I looked at the diffs before commit. I should have noticed it... >> >> It was rare that a was 1 and therefore the problem did not show up for a >> while. (I know I should have had tests exercising all cases...) >> >> When the bug showed up, it was kind of difficult to remember what was the >> original intent. Fortunately, looking at old versions allowed me to find the >> problem commit and the bug. >> >> Any suggestion on how to avoid this type of error in the future? > > > My suggestion: configure your editor to insert the appropriate amount of > spaces instead of a tab when you press the tab key. +1 - tabs are evil.