Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!news2.arglkargh.de!news.albasani.net!news.stack.nl!newsfeed.xs4all.nl!newsfeed1.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 0.025 X-Spam-Evidence: '*H*': 0.95; '*S*': 0.00; ';-)': 0.03; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'python': 0.11; 'jan': 0.12; 'declarations': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'reedy': 0.16; 'subject:object': 0.16; 'subject:when': 0.16; 'wrote:': 0.18; 'rules': 0.22; 'header :User-Agent:1': 0.23; 'developers': 0.25; 'header:X-Complaints- To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'posting': 0.31; 'there.': 0.32; 'core': 0.34; 'basic': 0.35; 'subject:data': 0.36; 'method': 0.36; 'should': 0.36; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'even': 0.60; 'experts': 0.60; 'then,': 0.60; 'received:173': 0.61; 'dear': 0.65; 'believe': 0.68; 'guideline': 0.84; 'guidelines.': 0.84; 'ps.': 0.84; 'received:fios.verizon.net': 0.84; 'rita': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Terry Reedy Subject: Re: data validation when creating an object Date: Wed, 15 Jan 2014 22:46:45 -0500 References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: pool-173-75-254-207.phlapa.fios.verizon.net User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 In-Reply-To: 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: 1389844030 news.xs4all.nl 2854 [2001:888:2000:d::a6]:49501 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:64045 On 1/15/2014 8:09 PM, Rita wrote: > I know its frowned upon to do work in the __init__() method and only > declarations should be there. Dear Python beginners: Don't believe the Python rules people write unless it is by one of the core developers or one of the other experts posting here. Even then, be skeptical. Even these people disagree on some guidelines. PS. The basic guideline is that your program should work correctly, and some people have disputed even that ;-) -- Terry Jan Reedy