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From: Peter Otten <__peter__@web.de>
Subject: Re: n00b question on spacing
Date: Sat, 22 Jun 2013 07:46:35 +0200
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Xref: csiph.com comp.lang.python:48915

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?

You can move the goal posts and change your API (to one similar to the 
logging module in the standard library, for example):

log.debug(
    "Wrote item to MongoDB database %s/%s",
    settings["MONGODB_DB"],
    settings["MONGODB_COLLECTIONS"],
    spider=spider)