Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #49109

Re: Is this PEP-able? fwhile

Path csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path <fabiosantosart@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.057
X-Spam-Evidence '*H*': 0.89; '*S*': 0.00; 'advocate': 0.07; 'subject:PEP': 0.07; 'cc:addr:python-list': 0.11; '&gt;&gt;': 0.16; "'for',": 0.16; '24,': 0.16; 'iterables': 0.16; 'wrote:': 0.18; '>>>': 0.22; 'email addr:gmail.com&gt;': 0.22; 'cc:addr:python.org': 0.22; '&gt;&gt;&gt;': 0.24; 'mon,': 0.24; 'cc:2**0': 0.24; 'cc:no real name:2**0': 0.24; '&gt;': 0.26; 'this:': 0.26; 'header:In-Reply-To:1': 0.27; 'am,': 0.29; 'message-id:@mail.gmail.com': 0.30; 'probably': 0.32; 'another': 0.32; "i'd": 0.34; 'but': 0.35; 'received:google.com': 0.35; 'too': 0.37; 'skip:& 10': 0.38; 'feed': 0.38; 'pm,': 0.38; 'expression': 0.60; 'ian': 0.60; 'subject:? ': 0.60; 'break': 0.61; 'took': 0.61; 'act': 0.63; 'to:addr:gmail.com': 0.65; 'subject:this': 0.83; "'and'": 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 :cc:content-type; bh=PSSeNFoiuBRH2lrIi/5IcsSLVGBQbG3/KUHV1cs9QEY=; b=F4InOyJSHe/0mlgKIClfBOXDLYqQTsH11JET1jzsCZKOn92WUs4tf1SWIVJcIaU5YR K9Kq8DwF/4JkfieTg+K/nKTV49HztqRiXjEMR+XWUdyxflRpvn9zfBda91Vl3qWw+wi7 5boBknym/tnvBLsfaXONeyHy+gq4XIr6B5J0LjNEcVzilkPvhazxNYzYRZebpa5UPTkG V2SYMgpbFXfzuTlltcaU4/xObIImBSKGikQrtc91P0JZTX6OWQvv5P9IqWd7DaKvbxXy alB5BGD+P21qF3ihSZRUXQp62NzkAioANai5Gku23Hgm133q06WlioUJaqIAToa2ygvc cdhQ==
MIME-Version 1.0
X-Received by 10.224.123.68 with SMTP id o4mr20740432qar.106.1372116909178; Mon, 24 Jun 2013 16:35:09 -0700 (PDT)
In-Reply-To <kqajj8$54h$1@dont-email.me>
References <8D03F2B8CF0E7BE-1864-1796B@webmail-m103.sysops.aol.com> <mailman.3760.1372104769.3114.python-list@python.org> <kqajj8$54h$1@dont-email.me>
Date Tue, 25 Jun 2013 00:35:09 +0100
Subject Re: Is this PEP-able? fwhile
From Fábio Santos <fabiosantosart@gmail.com>
To alex23 <wuwei23@gmail.com>
Content-Type multipart/alternative; boundary=047d7bd6bc92f6461e04dfeedc8a
Cc python-list@python.org
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.3788.1372116912.3114.python-list@python.org> (permalink)
Lines 68
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1372116912 news.xs4all.nl 15886 [2001:888:2000:d::a6]:48528
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:49109

Show key headers only | View raw

[Multipart message — attachments visible in raw view] - view raw

On 25 Jun 2013 00:31, "alex23" <wuwei23@gmail.com> wrote:
>
> On 25/06/2013 6:12 AM, Ian Kelly wrote:
>>
>> On Mon, Jun 24, 2013 at 1:52 PM,  <jimjhb@aol.com> wrote:
>>>
>>> Syntax:
>>> fwhile X in ListY and conditionZ:
>>>
>>> fwhile would act much like 'for', but would stop if the condition after
the
>>> 'and' is no longer True.
>>
>>
>> I would advocate using the break myself.  Another alternative is this:
>>
>> for X in itertools.takewhile(lambda X: conditionZ, ListY):
>>      ...
>
>
> I'd probably just go with a generator expression to feed the for loop:
>
>     for X in (i for i in ListY if conditionZ):
>         ....

That is nice but it's not lazy. If the condition or the iterables took too
long to compute, it would be troublesome.

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Re: Is this PEP-able? fwhile Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-24 14:12 -0600
  Re: Is this PEP-able? fwhile alex23 <wuwei23@gmail.com> - 2013-06-25 09:14 +1000
    Re: Is this PEP-able? fwhile Fábio Santos <fabiosantosart@gmail.com> - 2013-06-25 00:35 +0100
      Re: Is this PEP-able? fwhile alex23 <wuwei23@gmail.com> - 2013-06-25 10:00 +1000
        Re: Is this PEP-able? fwhile Fábio Santos <fabiosantosart@gmail.com> - 2013-06-25 01:19 +0100
        Re: Is this PEP-able? fwhile wu wei <wuwei23@gmail.com> - 2013-06-25 10:41 +1000
        Re: Is this PEP-able? fwhile Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-24 22:50 -0600
    Re: Is this PEP-able? fwhile rusi <rustompmody@gmail.com> - 2013-06-24 23:04 -0700

csiph-web