Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed4.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 0.004 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'static': 0.04; 'reason,': 0.07; 'arguments': 0.09; 'happen.': 0.09; 'type,': 0.09; 'python': 0.11; 'behave': 0.16; 'enlighten': 0.16; 'finney': 0.16; 'pythonic': 0.16; 'strong,': 0.16; 'thread,': 0.16; 'threw': 0.16; 'language': 0.16; 'sender:addr:gmail.com': 0.17; 'wrote:': 0.18; "python's": 0.19; 'typing': 0.19; 'help.': 0.21; '>>>': 0.22; 'example': 0.22; 'issue.': 0.22; 'error': 0.23; 'sort': 0.25; "i've": 0.25; 'equivalent': 0.26; 'header:In-Reply-To:1': 0.27; 'testing': 0.29; 'message-id:@mail.gmail.com': 0.30; 'writes:': 0.31; 'anyone': 0.31; 'this.': 0.32; 'bugs': 0.33; 'not.': 0.33; 'to:name:python-list': 0.33; 'trouble': 0.34; 'could': 0.34; 'problem': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'there': 0.35; 'really': 0.36; 'raising': 0.36; 'surely': 0.36; 'subject:?': 0.36; 'should': 0.36; 'ben': 0.38; 'handle': 0.38; 'to:addr:python-list': 0.38; 'does': 0.39; 'to:addr:python.org': 0.39; 'august': 0.61; 'new': 0.61; 'more': 0.64; 'it!': 0.67; 'enjoy': 0.71; 'pain': 0.84; '2013': 0.98 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=A+tSFwrH3ZUdmfRxKvnHKW5OFoq8lEnA8n2jU/1rrpE=; b=NY8ekIJNmXUNPJ5f8ZfEwexqEx+lUWhtJ4vjtHZyf9jHvShXN+qKm3/nySHjjFGUVs 8oPNxgtocEmpFHiNlbHLFLTkHgnq7YMZeT2gIxwRjbb4S45shGwd4Deo81LdPoQl2sha crOeyxff7lJOApoe/6V/CnshJ95vwlVGOoFohobgywhmysP1XccQLcoRmBhOpnqwk7VK Cw1yx/JyWyZynTwQBygixErU6ZWi+Q00pDqkffv6voeffBrZrffD0ve7YFCqgg9p9qAL uY+mtb5a+gHz4wUfHwGL7ELQIbY1LQLEn8xvNr/uIsp/LkgSPWy7uLP852HmE59s+CfL QVJQ== X-Received: by 10.112.209.2 with SMTP id mi2mr791452lbc.63.1375780835969; Tue, 06 Aug 2013 02:20:35 -0700 (PDT) MIME-Version: 1.0 Sender: joshua.landau.ws@gmail.com In-Reply-To: References: From: Joshua Landau Date: Tue, 6 Aug 2013 10:19:55 +0100 X-Google-Sender-Auth: kb1TViC9wAfFY5vfrA3ovYdVaRs Subject: Re: Newbie: static typing? To: python-list 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: 34 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1375780843 news.xs4all.nl 15867 [2001:888:2000:d::a6]:56391 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:52010 On 6 August 2013 10:01, Rui Maciel wrote: > Ben Finney wrote: > >> Rui Maciel writes: >> >>> Is there any pythonic way to perform static typing? >> >> I think no; static typing is inherently un-Pythonic. >> >> Python provides strong, dynamic typing. Enjoy it! > > Bummer. It's really not. >>> Does anyone care to enlighten a newbie? >> >> Is there some specific problem you think needs static typing? Perhaps >> you could start a new thread, giving an example where you are having >> trouble and you think static typing would help. > > It would be nice if some functions threw an error if they were passed a type > they don't support or weren't designed to handle. That would avoid having > to deal with some bugs which otherwise would never happen. > > To avoid this sort of error, I've been testing arguments passed to some > functions based on their type, and raising TypeError when necessariy, but > surely there must be a better, more pythonic way to handle this issue. Unless you have a very good reason, don't do this. It's a damn pain when functions won't accept my custom types with equivalent functionality -- Python's a duck-typed language and it should behave like one.