Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!feeder.news-service.com!newsfeed.xs4all.nl!newsfeed6.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 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.01; 'compiler': 0.07; 'removes': 0.07; 'semantic': 0.07; 'terry': 0.07; 'python': 0.07; 'collections': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:80.91.229.12': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'received:lo.gmane.org': 0.09; 'sun,': 0.09; 'essentially': 0.12; 'subject:error': 0.12; 'am,': 0.14; 'wrote:': 0.14; 'reedy': 0.16; 'argument': 0.16; 'jan': 0.22; 'header:In-Reply-To:1': 0.22; 'asked': 0.25; 'calling': 0.25; 'version': 0.25; 'properly': 0.25; 'bugs': 0.29; 'does': 0.31; 'perhaps': 0.32; 'to:addr:python- list': 0.32; 'header:X-Complaints-To:1': 0.34; 'change': 0.34; 'header:User-Agent:1': 0.35; 'doing': 0.36; 'rather': 0.36; 'some': 0.37; 'should': 0.37; 'received:org': 0.38; 'under': 0.39; 'to:addr:python.org': 0.39; 'header:Mime-Version:1': 0.39; 'header:Received:5': 0.40; '2011': 0.62; 'ever': 0.65; 'introduce': 0.78; 'heard.': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Terry Reedy Subject: Re: Fibonacci series recursion error Date: Mon, 02 May 2011 14:56:13 -0400 References: <87iptw1egh.fsf@rudin.co.uk> <87ei4k0ygz.fsf@rudin.co.uk> <87aaf7246f.fsf@rudin.co.uk> <4dbd221a$0$29991$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: rain.gmane.org User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.17) Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10 In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 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: 26 NNTP-Posting-Host: 82.94.164.166 X-Trace: 1304362588 news.xs4all.nl 81479 [::ffff:82.94.164.166]:44072 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:4492 On 5/2/2011 9:14 AM, Hans Georg Schaathun wrote: > On Sun, 01 May 2011 18:24:30 -0400, Terry Reedy > : Python does not do this automatically because 1) it can be a semantic > : change under some circumstances; 2) one who wants the iterative version > : can just as easily write it directly; > > That's the silliest argument I ever heard. Calling something silly when you have not really read it and perhaps asked questions to really understand it is, to me, silly. If you want a compiler that can introduce bugs into your program by doing what it thinks you meant, rather than what you said, don't use CPython. > : and 3) Python has a better way to > : process collections that removes essentially all the boilerplate in the > : recursive-call and while-loop versions: To properly use modern Python, one should know and use for loops and iterators. -- Terry Jan Reedy