Path: csiph.com!news.mixmin.net!weretis.net!feeder1.news.weretis.net!news.solani.org!.POSTED!not-for-mail
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.python
Subject: Re: Python Advanced Help
Date: Tue, 15 Mar 2016 19:27:35 +0100
Organization: PointedEars Software (PES)
Lines: 38
Message-ID: <9472462.AbmyeGU04E@PointedEars.de>
References: <mailman.159.1458042507.12893.python-list@python.org>
Reply-To: Thomas 'PointedEars' Lahn <usenet@PointedEars.de>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8Bit
X-Trace: solani.org 1458066456 10277 eJwFwQkBwDAIA0BLa3kCcgIU/xJ2Z+LHG+rmamsLcIJE+HTdlOhmmnxQySdX8Aqnt5jNqeEPJJkR9g== (15 Mar 2016 18:27:36 GMT)
X-Complaints-To: abuse@news.solani.org
NNTP-Posting-Date: Tue, 15 Mar 2016 18:27:36 +0000 (UTC)
User-Agent: KNode/4.14.2
X-User-ID: eJwFwQkBwDAIA0BLpOGV01HwL2F3Rod3qJurre37EswrHJFY4y2oPCmdGDxrviPZ3agFhztBRMKP7pbl+QFB9xTR
Cancel-Lock: sha1:JiZFWtxnBsK44X05S1VR/yMUb1M=
X-NNTP-Posting-Host: eJwFwQkBwDAIA0BNPEmHHFiDfwm9Q9D4nySYWOxK8XlGVt+ZZYUZ6GNq58SoUZSQpTt17AEk0hFq
Xref: csiph.com comp.lang.python:104950

Luke Charlton wrote:

> Okay, So basically I created a python script around 1 year ago to grab an
> explain_plan from a Greenplum system (Normal SQL) and change it around and
> explain each step/section, the thing is, I've came back to the python code
> and I don't understand anything of what it's doing (the code
> specifically).

OK, so, basically, RTFM and STFW.  Also, you can print($object.__doc__) for 
each $object that you do not understand.

> The Script does work but I just want to explain each section to myself and
> understand it a bit more as I've forgot Python. This means putting
> comments/notes in next to each section to explain it but hidden so it
> doesn't show up when ran, so using the # commenting out #.

It is sufficient for Python single-line comments if the line starts with “#” 
(optionally preceded by whitespace).  Everything else is decoration.
I use leading “##” and “###” to tell documentation comments (other than 
docstrings) from comment lines that disable code (lines starting with “#” 
only) before it is cleaned up.  (WFM.  There might be a PEP about this that 
recommends otherwise.)
 
> […]
> Code (Python) - http://pastebin.com/sVhW34fc (This is the one I'm trying
> to understand) Before & After of an Explain_Plan in SQL Greenplum -
> http://pastebin.com/81kNWVcy
> 
> What we're aiming for (Teradatas Explain_Plan) -
> http://pastebin.com/Nm4g12B3

<http://www.catb.org/esr/faqs/smart-questions.html>

-- 
PointedEars

Twitter: @PointedEars2
Please do not cc me. / Bitte keine Kopien per E-Mail.