From dt-sapug at handcraftedcomputers.com.au  Wed May 19 10:35:53 2010
From: dt-sapug at handcraftedcomputers.com.au (Daryl Tester)
Date: Wed, 19 May 2010 18:05:53 +0930
Subject: [sapug] US Pycon videos online
Message-ID: <4BF3A2E9.2000105@handcraftedcomputers.com.au>

Y'all.

The 2010 Pycon in Atlanta has videoed their talks and put them online.
A lot of potentially interesting stuff, if you have the time to sit
down and watch that sort of thing ...

<http://us.pycon.org/2010/conference/talks/>

-- 
Regards,
  Daryl Tester

Member of the Amalgamated Australian Association Against Apostrophe Abuse.
(formerly the 6A's - no, wait ...).

From garrytre at bigpond.com  Tue May 25 06:39:58 2010
From: garrytre at bigpond.com (Garry Trethewey)
Date: Tue, 25 May 2010 14:09:58 +0930
Subject: [sapug] python subprocess.call variable
Message-ID: <4BFB549E.10901@bigpond.com>

Hello

In python 2.5, ubuntu 8.04, how can I get a variable to work, instead of 
having to use a string literal, in the following?

I want to do

subprocess.call('scanimage  -args-  > ${outfile}', shell = True)

but I can only do

subprocess.call('scanimage  -args-  > /home/garry/Desktop/junk', shell = 
True)

Everything on the web I've seen is a string literal, not a variable, 
except one instance of $HOME, which kinda doesn't count, because the 
variable already existed before.

I've fiddled for 5 hours, time to ask for help.

Anybody know how do do this?
------------------------------------
Garry Trethewey
------------------------------------



From dt-sapug at handcraftedcomputers.com.au  Tue May 25 10:17:01 2010
From: dt-sapug at handcraftedcomputers.com.au (Daryl Tester)
Date: Tue, 25 May 2010 17:47:01 +0930
Subject: [sapug] python subprocess.call variable
In-Reply-To: <4BFB549E.10901@bigpond.com>
References: <4BFB549E.10901@bigpond.com>
Message-ID: <4BFB877D.5000801@handcraftedcomputers.com.au>

Garry Trethewey wrote:

> subprocess.call('scanimage  -args-  > ${outfile}', shell = True)
> 
> but I can only do
> 
> subprocess.call('scanimage  -args-  > /home/garry/Desktop/junk', shell = 
> True)

This is just standard string substitution (see 3.6.2 "String Formatting
Operations <http://docs.python.org/release/2.5.2/lib/typesseq-strings.html>).

You might use (given outfile = '/some/path'):

subprocess.call('scanimage -args- > %s' % outfile, shell = True)

Or are you actually trying to retrieve $HOME?


-- 
Regards,
  Daryl Tester