Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!newsfeed.xs4all.nl!newsfeed5.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 0.002 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'syntax': 0.03; 'heavily': 0.04; 'received:134': 0.05; 'that?': 0.05; 'before.': 0.09; 'subject:while': 0.09; 'terry': 0.09; '3.3.': 0.16; 'champion': 0.16; 'discarded': 0.16; 'discuss.': 0.16; 'driscoll': 0.16; 'general.': 0.16; 'left,': 0.16; 'reedy': 0.16; 'rejected.': 0.16; 'simpson': 0.16; 'subject:expression': 0.16; 'later': 0.16; 'wrote:': 0.17; '>>>': 0.18; 'discussion': 0.20; '3.2': 0.22; 'assignment': 0.22; 'visible': 0.22; 'header:In-Reply-To:1': 0.25; 'header:User-Agent:1': 0.26; 'used,': 0.27; 'probably': 0.29; "i'm": 0.29; 'that.': 0.30; 'sense': 0.31; 'point': 0.31; 'proposals': 0.33; 'substantial': 0.33; 'to:addr:python-list': 0.33; 'ahead': 0.35; 'nature': 0.35; 'pm,': 0.35; 'something': 0.35; 'there': 0.35; 'list.': 0.35; 'but': 0.36; 'correctly': 0.37; 'quite': 0.37; 'far': 0.37; 'subject:: ': 0.38; 'some': 0.38; 'possible.': 0.38; 'to:addr:python.org': 0.39; 'little': 0.39; 'think': 0.40; 'your': 0.60; 'most': 0.61; 'interest': 0.62; 'lack': 0.71; 'obvious': 0.71; "'from'": 0.84; 'improvement': 0.84; 'pardon': 0.84; 'do:': 0.91 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AnATAEkgiVCGuA9G/2dsb2JhbABEiGS1e4ZoAQEFeBELGAkWDwkDAgECAUUTCAKIALRbiQiLYYNJgyQDlXSFU4pqgnE Date: Thu, 25 Oct 2012 13:22:17 +0200 From: Antoon Pardon User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.16) Gecko/20120925 Iceowl/1.0b1 Icedove/3.0.11 MIME-Version: 1.0 To: python-list@python.org Subject: Re: while expression feature proposal References: <50886398.5050301@tim.thechases.com> <20121024222656.GA32708@cskk.homeip.net> <5088779A.3000202@cs.wisc.edu> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit 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: 46 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1351164207 news.xs4all.nl 6953 [2001:888:2000:d::a6]:47584 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:32117 On 25-10-12 06:50, Terry Reedy wrote: > On 10/24/2012 7:19 PM, Evan Driscoll wrote: >> On 10/24/2012 05:26 PM, Cameron Simpson wrote: >>> But I'm still -0 on it, because it supplants the glaringly obvious: >>> >>> m = ... >>> >>> assignment with the far less in your face: >>> >>> possibly-long-expr as m >>> >>> and I think it would get quite heavily used, to the detriment of >>> assignment readability in general. At present the nature of most >>> effects >>> is at the left. An assignment is obvious on the left, an >>> if/with/while/etc >>> is visible at the left. >> >> In the interest of brainstorming, what about >> >> while VAR from EXPR: >> >> or something like that? I don't think I like 'from' on a couple counts, >> but there's probably some word that fits. > > The op wondered if these proposals have been made before. They have > been, and have been rejected. Some of the discussion has been on > python-ideas list. But go ahead and brainstorm and discuss. > > Keep in mind that any new syntax has to be a substantial improvement > in some sense or make something new possible. There was no new syntax > in 3.2 and very little in 3.3. If I recal correctly at one point the following was accepted: do: suite while expr: suite But it was later discarded because of lack of a champion or something like that. -- Antoon Pardon