Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed4a.news.xs4all.nl!xs4all!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 0.005 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'true,': 0.05; 'subject:Python': 0.06; 'odd': 0.07; 'false.': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; '+even': 0.16; 'message-id:@4ax.com': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'unix,': 0.16; 'thu,': 0.19; 'feb': 0.22; 'shell': 0.22; 'error': 0.23; 'url:home': 0.24; 'defined': 0.27; 'header:X-Complaints-To:1': 0.27; 'unix': 0.29; 'probably': 0.32; 'know.': 0.32; 'but': 0.35; 'there': 0.35; 'false': 0.36; 'charset:us-ascii': 0.36; 'to:addr:python-list': 0.38; 'rather': 0.38; 'to:addr:python.org': 0.39; 'either': 0.39; 'received:org': 0.40; 'even': 0.60; 'mentioned': 0.61; 'success': 0.61; 'success,': 0.65; 'miss': 0.74; '2015': 0.84; 'subject:Practices': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Dennis Lee Bieber Subject: Re: Python Worst Practices Date: Thu, 26 Feb 2015 20:31:05 -0500 Organization: IISS Elusive Unicorn References: <85bnkh5z96.fsf@benfinney.id.au> <85zj814jmb.fsf@benfinney.id.au> <1103e6a0-2183-4641-bf98-2927806c2172@email.android.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: adsl-76-249-31-24.dsl.klmzmi.sbcglobal.net X-Newsreader: Forte Agent 6.00/32.1186 X-No-Archive: YES 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: 18 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1425000674 news.xs4all.nl 2872 [2001:888:2000:d::a6]:52572 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:86558 On Thu, 26 Feb 2015 20:10:28 +0000, Simon Ward declaimed the following: > >0 = success and non-zero = failure is the meme established, rather than 0 = true, non-zero = false. > >It's not just used by UNIX, and is not necessarily defined by the shell either (bash was mentioned elsewhere in the thread). There is probably a system that pre-dates UNIX that I uses/used this too, but I don't know. > I miss VMS... Odd => true, even => false Odd -> success, +even -> warning, -even -> error (odd may have been success vs info> -- Wulfraed Dennis Lee Bieber AF6VN wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/