Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.001
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python.': 0.02; 'continuation': 0.07; 'follows.': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'skip:% 20': 0.09; 'subject:question': 0.10; 'python': 0.11; 'jan': 0.12; 'wrote': 0.14; 'code?': 0.16; 'indent': 0.16; 'pep8': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'reedy': 0.16; 'splitting': 0.16; 'terribly': 0.16; 'wrote:': 0.18; 'rules': 0.22; 'header :User-Agent:1': 0.23; 'question': 0.24; 'code:': 0.26; 'header:X -Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'point': 0.28; 'function': 0.29; 'code': 0.31; 'lines': 0.31; 'breaking': 0.31; 'reader': 0.33; 'screen': 0.34; 'skip:s 30': 0.35; 'there': 0.35; 'really': 0.36; 'hi,': 0.36; 'to:addr:python-list': 0.38; 'fact': 0.38; 'pm,': 0.38; 'to:addr:python.org': 0.39; 'either': 0.39; 'received:org': 0.40; 'new': 0.61; 'received:173': 0.61; 'eyes': 0.78; 'calls,': 0.84; 'ok?': 0.84; 'received:fios.verizon.net': 0.84
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: n00b question on spacing
Date: Fri, 21 Jun 2013 18:33:13 -0400
References: <CAJ=2b07ETuSuo2+3Xu6vMOJA+q1JwUFTezO3LaYLG8wXd+FLBQ@mail.gmail.com>
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/20130509 Thunderbird/17.0.6
In-Reply-To: <CAJ=2b07ETuSuo2+3Xu6vMOJA+q1JwUFTezO3LaYLG8wXd+FLBQ@mail.gmail.com>
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.3673.1371854012.3114.python-list@python.org>
Lines: 31
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1371854012 news.xs4all.nl 15956 [2001:888:2000:d::a6]:50523
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:48888

On 6/21/2013 5:17 PM, Yves S. Garret wrote:
> Hi, I have a question about breaking up really long lines of code in Python.
>
> I have the following line of code:
> log.msg("Item wrote to MongoDB database %s/%s" %(settings['MONGODB_DB'],
> settings['MONGODB_COLLECTION']), level=log.DEBUG, spider=spider)
>
> Given the fact that it goes off very far to the right on my screen is
> not terribly
> pleasing to my eyes (and can be rude for other developers).
>
> I was thinking of splitting it up like so:
> log.msg("Item wrote to MongoDB database %s/%s"
>    %(settings['MONGODB_DB'], settings['MONGODB_COLLECTION']),
>    level=log.DEBUG, spider=spider)
>
> Is this ok?  Are there any rules in Python when it comes to breaking up
> long lines of code?

For function calls, PEP8 suggests either an extra indent or line up as 
follows.
log.msg("Item wrote to MongoDB database %s/%s"
         %(settings['MONGODB_DB'], settings['MONGODB_COLLECTION']),
         level=log.DEBUG, spider=spider)

The point is to not look like a normal indent to clue reader that these 
are continuation lines and not new statements.

-- 
Terry Jan Reedy