Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!eweka.nl!lightspeed.eweka.nl!194.109.133.87.MISMATCH!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!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 0.009 X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'output': 0.05; 'list?': 0.07; 'subject:PEP': 0.07; 'string': 0.09; 'alter': 0.09; 'cc:addr :python-list': 0.11; 'question.': 0.14; '12:50': 0.16; 'easily,': 0.16; 'example?': 0.16; 'given,': 0.16; 'splitting': 0.16; 'stuff.': 0.16; 'thursday,': 0.16; 'wrote:': 0.18; 'bit': 0.19; 'trying': 0.19; 'thu,': 0.19; 'written': 0.21; 'seems': 0.21; 'example': 0.22; 'aug': 0.22; 'email addr:gmail.com>': 0.22; 'cc:addr:python.org': 0.22; 'certainly': 0.24; 'looks': 0.24; 'cc:2**0': 0.24; 'cc:no real name:2**0': 0.24; '>': 0.26; 'header:In-Reply-To:1': 0.27; 'idea': 0.28; 'am,': 0.29; 'message- id:@mail.gmail.com': 0.30; "i'm": 0.30; 'url:mailman': 0.30; 'lists': 0.32; 'quite': 0.32; 'url:python': 0.33; 'cases': 0.33; 'founded': 0.33; 'maybe': 0.34; 'subject:from': 0.34; 'could': 0.34; 'problem': 0.35; 'basic': 0.35; 'agree': 0.35; 'something': 0.35; 'subject:lists': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'there': 0.35; 'wishes,': 0.36; 'url:listinfo': 0.36; 'doing': 0.36; 'useful': 0.36; 'possible': 0.36; 'url:org': 0.36; 'should': 0.36; 'list': 0.37; 'list.': 0.37; 'skip:& 10': 0.38; 'pm,': 0.38; 'does': 0.39; 'enough': 0.39; 'skip:p 20': 0.39; 'url:mail': 0.40; 'august': 0.61; 'simple': 0.61; "you've": 0.63; 'kind': 0.63; 'occur': 0.65; 'to:addr:gmail.com': 0.65; 'jobs': 0.68; 'case?': 0.84; 'quicker': 0.84; 'afford': 0.91; '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=VSryZ8HzjzYj8/EEuVd18FE5pDgVVdnDWk8StnlGLbw=; b=MRsOqGC0e0b9WufkFLBDee+nsO0CIckYaJQHuNRwAEV8SQGJVs+zMMhMENL81lkUJd Auw3cp+84B2nQ8l1ZpE5gpRza732bpIokcCPGGAt+exlcqffAKqs2y780kqziT1zOmYZ M9n4H69ThpLcEvnURie0rWGpyHhpyxiFRF1GHhSDPt2Ja/DMsuWcbN1DYehB7QE+Tl7w S0CWgOe0FoOL84MnjKWDLRsgtABObd6lo/hZV5YJH/C36xYYE/KGCao8SdddMapH3o8c nAc8wFCgSRR0N1Trv23sB/AVRy4xvtFd0NZk/YxrWYW9BP/TFJvP2Ed2cisi1YMVKHPw t3qg== MIME-Version: 1.0 X-Received: by 10.49.82.74 with SMTP id g10mr5720988qey.80.1375967293894; Thu, 08 Aug 2013 06:08:13 -0700 (PDT) In-Reply-To: <62769807-dff7-40a0-a060-d1e0b7c0685f@googlegroups.com> References: <531d89a8-61e1-4117-b4cc-f02b3be30bb9@googlegroups.com> <9bd6192b-2c71-4662-808a-fd7e74dedeb8@googlegroups.com> <62769807-dff7-40a0-a060-d1e0b7c0685f@googlegroups.com> Date: Thu, 8 Aug 2013 14:08:13 +0100 Subject: Re: Suggestion: PEP for popping slices from lists From: Nicholas Cole To: Neatu Ovidiu Content-Type: multipart/alternative; boundary=047d7b6dc9acc675b304e36f5918 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 230 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1375967296 news.xs4all.nl 15990 [2001:888:2000:d::a6]:38207 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:52194 --047d7b6dc9acc675b304e36f5918 Content-Type: text/plain; charset=ISO-8859-1 On Thu, Aug 8, 2013 at 12:50 PM, Neatu Ovidiu wrote: > On Thursday, August 8, 2013 2:44:05 PM UTC+3, Neatu Ovidiu wrote: > > On Thursday, August 8, 2013 2:12:53 PM UTC+3, Nicholas wrote: > > > > > On Thu, Aug 8, 2013 at 11:38 AM, Neatu Ovidiu > wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > But what's your use case? > > > > > > > > > > > > > > > > > > > > > > Does it occur often enough that you cannot afford a two-liner like > > > > > > > > > > I think uses cases are plenty. > > > > > > > > > > > > > > > > > > > > > > > > > The possible cases I can think of would be better served with list > comprehensions (what you seem to want is to create lists based on other > lists) - but maybe I'm missing something. Could we have one example? > > > > > > > > > > > > > > > > > > > > N. > > > > > > > > This can be useful for doing all kinds of basic stuff. For example if > you wanted to take 4 items of a list at at a time, do something with them > and then update the list. > > > > > > > > jobs = ['job1', 'job2', 'job3', 'job4', 'job5', 'job6', 'job7', 'job8', > 'job9', 'job10'] > > > > while jobs: > > > > print(jobs.pop_slice(0,4)) > > > > > > > > should output > > > > > > > > 'job1', 'job2', 'job3', 'job4' > > > > 'job5', 'job6', 'job7', 'job8' > > > > 'job9', 'job10' > > The idea "popped" in my mind while thinking about this question. > > http://stackoverflow.com/questions/18121416/right-split-a-string-into-groups-of-3/18122084 > I founded the list comprehensions solutions kind of cumbersome and thought > that there should be a simple way to do this kind of stuff. > -- > http://mail.python.org/mailman/listinfo/python-list > Still seems a bit like a solution looking for a problem to me. Why would you want to take four items at a time for a job from an arbitrary part of a list? I agree splitting a string into groups of three looks a bit cumbersome in the example you've given, but a generator could be written quite easily, and would almost certainly be quicker than trying to alter the list in place. Best wishes, N. --047d7b6dc9acc675b304e36f5918 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
On Thu, Aug 8, 2013 at 12:50 PM= , Neatu Ovidiu <neatuovi@gmail.com> wrote:
On T= hursday, August 8, 2013 2:44:05 PM UTC+3, Neatu Ovidiu wrote:
> On Thursday, August 8, 2013 2:12:53 PM UTC+3, Nicholas wrote:
>
> > On Thu, Aug 8, 2013 at 11:38 AM, Neatu Ovidiu <neat...@gmail.com> wrote:
>
> >
>
> >
>
> >
>
> >
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> >
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> >
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> >
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> > > But what's your use case?
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> >
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> > >
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> >
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> > > Does it occur often enough that you cannot afford a two-line= r like
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> >
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> > I think uses cases are plenty.
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> >
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> >
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> >
>
> >
>
> > The possible cases I can think of would be better served with lis= t comprehensions (what you seem to want is to create lists based on other l= ists) - but maybe I'm missing something. =A0Could we have one example?<= br> >
> >
>
> >
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> >
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> > N.
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> This can be useful for doing all kinds of basic stuff. For example if = you wanted to take 4 items of a list at at a time, do something with them a= nd then update the list.
>
>
>
> jobs =3D ['job1', 'job2', 'job3', 'job4= 9;, 'job5', 'job6', 'job7', 'job8', 'jo= b9', 'job10']
>
> while jobs:
>
> =A0 =A0 print(jobs.pop_slice(0,4))
>
>
>
> should output
>
>
>
> 'job1', 'job2', 'job3', 'job4'
>
> 'job5', 'job6', 'job7', 'job8'
>
> 'job9', 'job10'

The idea "popped" in my mind while thinking about thi= s question.
http://stackoverflow.com/ques= tions/18121416/right-split-a-string-into-groups-of-3/18122084
I founded the list comprehensions solutions kind of cumbersome and thought = that there should be a simple way to do this kind of stuff.
--
http://mail.python.org/mailman/listinfo/python-list


<= /div>
Still seems a bit like a solution loo= king for a problem to me.

<= div class=3D"gmail_extra" style> Why would you want to take four items at a time for a job from an arbitrary= part of a list? =A0I agree splitting a string into groups of three looks a= bit cumbersome in the example you've given, but a generator could be w= ritten quite easily, and would almost certainly be quicker than trying to a= lter the list in place.

Best wishes,

N.



<= br>
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