Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <rosuav@gmail.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.060
X-Spam-Evidence: '*H*': 0.88; '*S*': 0.00; 'advance': 0.07; 'string': 0.09; 'useless': 0.09; 'elements,': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'simpler,': 0.16; 'sat,': 0.16; 'wrote:': 0.18; 'aug': 0.22; '31,': 0.24; 'header:In-Reply- To:1': 0.27; 'testing': 0.29; 'instruction': 0.29; "doesn't": 0.30; 'message-id:@mail.gmail.com': 0.30; 'cases': 0.33; 'maybe': 0.34; 'problem': 0.35; 'but': 0.35; 'received:google.com': 0.35; '(we': 0.36; 'similar': 0.36; 'skip:- 20': 0.37; 'to:addr:python- list': 0.38; 'pm,': 0.38; 'to:addr:python.org': 0.39; 'solve': 0.60; 'more': 0.64; 'occur': 0.65; 'between': 0.67; 'clearer': 0.84; 'subject:space': 0.84; '2013': 0.98
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=+5US3nt2O1gST4ZH1rbN6/mzEv8ObtRTDXxV4luK3vU=; b=MIqKJ0uG00QL3YjQu+/lCpQR/3chd+xf71oNI/GE3UoMEHKJSGgLUaKCN9XJRSVyk0 VGFCQ8YLQ8eN2VwPEcr7HF4D93J907jACp1XmVLHGn2QcXZmncXcYDJeWUkQoTv1wRf7 uGJuS5aWGMS3C6rYsj8C2U7U+DfZixPMnH5psuAm6DwCzvBZ7u2e2yNhIPh++h7rlq9K 9hdyq6oqP6M/0ZqOGErwmhLelCYAn98GQO760TvTHYweq7LgDuunSuzmGi6eIxcEMLsP rJ+QQ1X7WF2BXVvbFkZ98l5AnEFO8y+A8HzjRniWJLsclZ7hFjcHOlKB7ysgmpAHvimv dE2g==
MIME-Version: 1.0
X-Received: by 10.220.74.69 with SMTP id t5mr13878821vcj.18.1377963048900; Sat, 31 Aug 2013 08:30:48 -0700 (PDT)
In-Reply-To: <5221f0af$0$2412$426a34cc@news.free.fr>
References: <5221a693$0$2059$426a74cc@news.free.fr> <mailman.405.1377938644.19984.python-list@python.org> <5221b68b$0$2280$426a74cc@news.free.fr> <mailman.406.1377945101.19984.python-list@python.org> <5221f0af$0$2412$426a34cc@news.free.fr>
Date: Sun, 1 Sep 2013 01:30:48 +1000
Subject: Re: print function and unwanted trailing space
From: Chris Angelico <rosuav@gmail.com>
To: python-list@python.org
Content-Type: text/plain; charset=ISO-8859-1
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.415.1377963057.19984.python-list@python.org>
Lines: 26
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1377963057 news.xs4all.nl 15875 [2001:888:2000:d::a6]:35747
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:53365

On Sat, Aug 31, 2013 at 11:33 PM, candide <candide@free.invalid> wrote:
> The if instruction imposes useless testing (we know in advance the problem
> to occur at the very end of the loop) and useless writing (writing '').
>
> The following is clearer
>
> # -------------------------
> n=5
> for i in range(n-1):
>     print(i, end=' ')
> print(n-1)
> # -------------------------
>
>
> but doesn't solve all the cases (imagine a string or an iterator).

Similar but maybe simpler, and copes with more arbitrary iterables:

it=iter(range(5))
print(next(it), end='')
for i in it:
    print('',i, end='')

Also guarantees to use 'sep' between the elements, fwiw.

ChrisA