Path: csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!cs.uu.nl!news.stack.nl!newsfeed.xs4all.nl!newsfeed1.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 0.005 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'sufficient': 0.05; 'subject:Python': 0.06; 'filter,': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'strings.': 0.09; '(however,': 0.16; 'class).': 0.16; 'iterable': 0.16; 'iterable)': 0.16; 'iterable,': 0.16; 'iterator': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'subject:class': 0.16; 'wrote:': 0.18; '3.0': 0.19; 'header:User-Agent:1': 0.23; 'question': 0.24; "i've": 0.25; 'references': 0.26; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'subject:list': 0.30; "i'm": 0.30; 'writes:': 0.31; 'lists': 0.32; 'noticed': 0.34; 'subject:the': 0.34; 'add': 0.35; 'done': 0.36; 'method': 0.36; 'behind': 0.37; 'list': 0.37; 'implement': 0.38; 'generic': 0.38; 'lists.': 0.38; 'others.': 0.38; 'to:addr:python-list': 0.38; 'list,': 0.38; 'pm,': 0.38; 'rather': 0.38; 'subject:': 0.39; 'to:addr:python.org': 0.39; 'changed': 0.39; 'received:org': 0.40; 'most': 0.60; 'received:173': 0.61; 'kind': 0.63; 'such': 0.63; 'friendly': 0.72; 'received:fios.verizon.net': 0.84; 'carries': 0.91; 'reasoning': 0.91 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Terry Jan Reedy Subject: Re: suggestion for a small addition to the Python 3 list class Date: Sun, 21 Apr 2013 21:44:05 -0400 References: <5173ACC00200007C000B7024@gwiawt1.is-svr.luc.edu> <87vc7fvmdf.fsf@nautilus.nautilus> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: pool-173-75-251-66.phlapa.fios.verizon.net User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 In-Reply-To: <87vc7fvmdf.fsf@nautilus.nautilus> 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: 36 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1366595053 news.xs4all.nl 2196 [2001:888:2000:d::a6]:49991 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:44029 On 4/21/2013 1:12 PM, Lele Gaifax wrote: > "Robert Yacobellis" writes: > >> I've noticed that the str join() method takes an iterable, Specifically, it takes an iterable of strings. Any iterable can be made such iwth map(str, iterable) or map(repr, iterble). >> so in the >> most general case I'm suggesting to add a join() method to every >> Python-provided iterable (however, for split() vs. join() .split *could* have been changed in 3.0 to return an iterator rather than a list, as done with map, filter, and others. An itersplit method *might* be added in the future. it would be >> sufficient to just add a join() method to the list class). > > That's the reasoning behind the rejection: to be friendly enough, you'd > need to include the "join" method in the "sequence protocol", and > implement it on every "sequence-like" object (be it some kind of > UserList, or a generator, or an interator...) Plus, only lists of strings can be joined, not generic lists. > This question carries several references to the various threads on the > subject: > > http://stackoverflow.com/questions/493819/python-join-why-is-it-string-joinlist-instead-of-list-joinstring > > ciao, lele. >