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; 'operator': 0.03; 'syntax': 0.04; 'correspond': 0.09; 'function,': 0.09; 'obsolete': 0.09; 'subject:module': 0.09; 'trailing': 0.09; 'underscore': 0.09; 'wrong,': 0.09; 'python': 0.11; 'mostly': 0.14; '"official"': 0.16; 'methods;': 0.16; 'naming': 0.16; 'operators.': 0.16; 'reedy': 0.16; 'symbols': 0.16; 'variants': 0.16; 'wrote:': 0.18; 'wed,': 0.18; '>>>': 0.22; 'creating': 0.23; 'module,': 0.24; 'certain': 0.27; 'header:In-Reply-To:1': 0.27; 'function': 0.29; 'am,': 0.29; 'message-id:@mail.gmail.com': 0.30; "skip:' 10": 0.31; "d'aprano": 0.31; 'names.': 0.31; 'operators': 0.31; 'steven': 0.31; 'class': 0.32; 'table': 0.34; '"the': 0.34; "i'd": 0.34; 'something': 0.35; 'operations': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'there': 0.35; 'curious': 0.36; 'functions.': 0.36; 'module.': 0.36; 'shows': 0.36; 'should': 0.36; 'two': 0.37; 'implement': 0.38; 'e.g.': 0.38; 'mapping': 0.38; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'rather': 0.38; 'to:addr:python.org': 0.39; 'according': 0.40; 'how': 0.40; 'remove': 0.60; 'eventually': 0.60; 'special': 0.74; 'duplication': 0.84; 'etc,': 0.84; 'gelonida': 0.84; 'overloading': 0.84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=vYhYe4DJ4Ic0ex2kIIch2Ovfv4FiulM5ayLn7iNfy+I=; b=menlVvhs/e6C9bcgUUcP+esOsynP0mClQpk+zTe4G7FdkSBPeDIU5ivKtVQtZQ2scs NRdACYDvXb8PfpToXiDZHazB1r8Q3MWkzNHwV+l7L71byzhD87bHfbdqGxFNbjZvm30v rnaIVWr5aVetykRANImcFJo1tnjJGRU8aa+kG9xGjLoCTpDj6G86ziQqg3BuNCdQrOB1 +qwyWoPGhYzGcEByEIRdlP43rEiXkLp8kZMRuN6iFRfjV7jAS5jZ/g/XxR2gpEM7iym6 04cn9VGBS11BZvuvHK6g1/t95Lhj+gJkflVTtZCJqVdbA4KRDCN+GWnEcfekeF2xAwsN GQog== X-Received: by 10.66.222.74 with SMTP id qk10mr13879517pac.70.1412803439254; Wed, 08 Oct 2014 14:23:59 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <54349662$0$12987$c3e8da3$5496439d@news.astraweb.com> <543518a5$0$12989$c3e8da3$5496439d@news.astraweb.com> From: Ian Kelly Date: Wed, 8 Oct 2014 15:23:18 -0600 Subject: Re: operator module functions To: Python 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: 40 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1412803456 news.xs4all.nl 2926 [2001:888:2000:d::a6]:38980 X-Complaints-To: abuse@xs4all.nl Path: csiph.com!usenet.pasdenom.info!bete-des-vosges.org!feed.ac-versailles.fr!nerim.net!novso.com!newsfeed.xs4all.nl!newsfeed4a.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Xref: csiph.com comp.lang.python:78851 On Wed, Oct 8, 2014 at 3:05 PM, Gelonida N wrote: > On 10/8/2014 9:09 PM, Terry Reedy wrote: >> >> On 10/8/2014 6:57 AM, Steven D'Aprano wrote: >> >>> According to the documentation, operator.__add__ is the "official" >>> function, >>> and operator.add is just there for convenience. >> >> >> You are paraphrasing "The function names are those used for special >> class methods; variants without leading and trailing __ are also >> provided for convenience." But then there is the following: >> >> 10.3.1. Mapping Operators to Functions >> >> This table shows how abstract operations correspond to operator symbols >> in the Python syntax and the functions in the operator module. >> Operation Syntax Function >> Addition a + b add(a, b) >> >> etc, using the 'convenient' names. I would like to deprecate and >> eventually remove the dunder names. To me, the duplication is not >> 'convenient'. >> > > > I'd be curious about a proposal to obsolete the double underscore functions > and just keep operator.add or to just keep the operator + > > For me they seem rather distinct, though they are interchangable in certain > situations. > > Perhaps I got something wrong, but all dunder functions are 'magic' > functions. Many of them mostly should ne used when when overloading > behaviour or when creating a class which should implement operators. This isn't about the dunder *method* names. It's about the naming of the functions in the operator module, e.g. having both operator.add and operator.__add__ that are two names for the same function.