Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed2.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 0.011 X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'exercise': 0.04; 'one?': 0.05; 'subject: -- ': 0.07; 'subject:bug': 0.07; 'wednesday,': 0.07; 'optimizing': 0.09; 'spec': 0.09; 'def': 0.12; 'fuzzy': 0.16; 'iterable': 0.16; 'loops': 0.16; 'so.': 0.16; 'wrote:': 0.18; 'wed,': 0.18; 'bit': 0.19; 'thu,': 0.19; 'seems': 0.21; 'header:In-Reply-To:1': 0.27; 'am,': 0.29; 'compared': 0.30; 'message-id:@mail.gmail.com': 0.30; 'helpful.': 0.31; 'class': 0.32; 'url:python': 0.33; 'maybe': 0.34; 'subject: (': 0.35; 'etc': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'there': 0.35; 'sequence': 0.36; 'thanks': 0.36; 'url:org': 0.36; 'two': 0.37; 'depends': 0.38; 'skip:[ 10': 0.38; 'to:addr:python-list': 0.38; 'short': 0.38; 'itself': 0.39; 'to:addr:python.org': 0.39; 'url:3': 0.61; 'first': 0.61; 'information': 0.63; 'such': 0.63; 'central': 0.64; 'map': 0.64; '30,': 0.65; 'abc': 0.84; 'toy': 0.84; 'ware': 0.91 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=wBcGZiMMmNCLp5Bbv0cAqSRE0oBYXPCqdNs7y5YyNd4=; b=C/9Eop9w0EzlbO5o7iSBJj1v7Xc8380THVmlZ+vZbuScm5IICed1db+oFHGqjlaWKI 7gKXu2gGdPFHGt2Tcf6D+61rH0b73prRdeTuJOlI449wBUX7BhuPP75TfzCGHAmn2EpN oe8ZhsmxTr/IZ3Umx7KxdIOoQED3q9SwwHAn21Zvh1T0QT2FQZ6/OGq4/Ad6/UW+3Tgh /gZQQjHcrMLPK8F4wrmPcUpuHjW6PvKj/TWTDCqFjUWUTg5AD6u12v8nIKnaCeWUV7kl ZwsB7qWAx49Ke+X2KPIi1S0vzfAxod6BADnzjWvcMVurnpz2XmgVzskAsvijOKVrq5dW I1ZA== X-Received: by 10.69.31.138 with SMTP id km10mr10876523pbd.6.1414689021022; Thu, 30 Oct 2014 10:10:21 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <94e3143a-c9ab-433d-8b3d-6ab296de14d9@googlegroups.com> <593c0099-770f-48cd-b7ba-22154b00f130@googlegroups.com> <525eb5e7-c221-4336-8c9a-aafb4c545f51@googlegroups.com> From: Ian Kelly Date: Thu, 30 Oct 2014 11:09:40 -0600 Subject: Re: Finding way around ABCs (was What for -- for? (was A bug?)) 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: 32 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1414689029 news.xs4all.nl 2973 [2001:888:2000:d::a6]:42670 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:79958 On Thu, Oct 30, 2014 at 11:01 AM, Rustom Mody wrote: > On Wednesday, October 29, 2014 11:49:27 AM UTC+5:30, Zachary Ware wrote: >> On Wed, Oct 29, 2014 at 1:11 AM, Rustom Mody wrote: >> > On Wednesday, October 29, 2014 11:10:06 AM UTC+5:30, Zachary Ware wrote: >> >> Of course, that's 3 (progressively shorter) loops to get the names of >> >> the ABCs of a class compared to 1 (fairly short in the first place) >> >> loop for a map of relationships to all available ABCs, but optimizing >> >> such a toy as this would just be an exercise in futility :) >> > >> > Not so. >> > >> > The charm of introspection is that the introspection >> > itself can be introspected. >> > For that to be convincing there needs to be a good combo >> > of clarity and succinctness. In particular why not reduce >> > the two functions to one? >> > >> > def get_abc_names(cls): >> > return [abc.__name__ for abc in abcs if issubclass(cls,abc)] >> >> Well, it depends on what you actually want, the spec has been a bit fuzzy ;) > > Thanks for this much -- its helpful. > Regarding ABCs -- is there a central documentation for them: > > "What exactly is a sequence or iterable or etc protocol?" > > This information seems to be strewn all over the place but systematically. Maybe the glossary? https://docs.python.org/3/glossary.html