Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder1.xlned.com!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <Thomas.Goebel@ohm-hochschule.de>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.096
X-Spam-Evidence: '*H*': 0.82; '*S*': 0.01; '[0,': 0.09; 'subject:create': 0.09; 'python': 0.11; 'received:141': 0.14; 'brackets:': 0.16; 'dict': 0.16; 'goebel': 0.16; 'simplified': 0.16; 'wrote:': 0.18; 'thu,': 0.19; 'header:User-Agent:1': 0.23; 'header:In-Reply-To:1': 0.27; 'code': 0.31; 'didnt': 0.31; 'occurs': 0.31; "we're": 0.32; 'maybe': 0.34; 'subject:lists': 0.35; 'but': 0.35; 'list': 0.37; 'lists.': 0.38; 'to:addr:python- list': 0.38; 'pm,': 0.38; 'to:addr:python.org': 0.39; 'header :Message-Id:1': 0.63; 'different': 0.65; 'thomas': 0.65; 'header :Reply-To:1': 0.67; 'reply-to:no real name:2**0': 0.71; 'miss': 0.74; 'square': 0.74; 'as:': 0.81; '2013': 0.98
Date: Thu, 11 Apr 2013 16:33:21 +0200
From: Thomas Goebel <Thomas.Goebel@ohm-hochschule.de>
Organization: Technische Hochschule Nuernberg
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130328 Thunderbird/17.0.5
MIME-Version: 1.0
To: python-list@python.org
Subject: Re: use a loop to create lists
References: <4c47da9e-c632-4855-98a7-0506d8013046@googlegroups.com> <51656F6A.5040103@th-nuernberg.de> <CAOjpqbPmjO1YS2N+931Q6+0NkHALnFocBydBtnhRxjHDf_d-DQ@mail.gmail.com> <5166A297.70104@th-nuernberg.de> <CAOjpqbM80RTXQsxgLJ9R_5X8uezWZQKcZ3F_fN8_vuq1D7_JoA@mail.gmail.com> <CAOjpqbMnZ_17iDj12qFqKU8sTEm7-QdYQAgi5T21R7k6kXFHgg@mail.gmail.com> <5166B345.8080200@th-nuernberg.de> <CAOjpqbOVME8dUXus9zBSLYCa+fJ8QsQYXd7sYw9RArfPHnHhKQ@mail.gmail.com>
In-Reply-To: <CAOjpqbOVME8dUXus9zBSLYCa+fJ8QsQYXd7sYw9RArfPHnHhKQ@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
Reply-To: Thomas.Goebel@ohm-hochschule.de
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.477.1365690806.3114.python-list@python.org>
Lines: 52
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1365690806 news.xs4all.nl 2659 [2001:888:2000:d::a6]:43595
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:43374

* On 11/04/2013 16:11, Franz Kelnreiter wrote:
> On Thu, Apr 11, 2013 at 2:57 PM, Thomas Goebel <
> Thomas.Goebel@ohm-hochschule.de> wrote:
> 
>> ...
>> Which is the same as:
>> f = {'list_' + str(n):[m for m in range(3)] for n in range(3)}
>>
> [...]
> But didnt you miss square brackets:
> 
> f = {'list_' + str(n):[[m for m in range(3)] for n in range(3)]}

If i try your code i get a dict with key 'list_2' which value is a
list of three lists.

Maybe this occurs because we're using different python versions?! I
never used python<2.7!

Have you tried this one

d2 = dict(('list_' + str(i), list(range(3))) for i in range(3))

with Chris' simplification:

* On 11/04/2013 15:22, Chris Angelico wrote:
> On Thu, Apr 11, 2013 at 10:57 PM, Thomas Goebel wrote:
>> [a for a in range(3)]
>>
>> will return a list
>> [0, 1, 2]
>
> Simplification possible: That's the same as:
>
> list(range(3))
>
>> f = {'list_' + str(n):[m for m in range(3)] for n in range(3)}
>
> Meaning that this can be simplified too:
>
> f = {'list_' + str(n):list(range(3)) for n in range(3)}