[Tutor] Running a dos program with python

[Armstrong, Richard J.]

From: srilyk at gmail.com [mailto:srilyk at gmail.com] On Behalf Of Wayne
Werner
Sent: Wednesday, March 10, 2010 3:00 PM
To: Armstrong, Richard J.
Cc: tutor at python.org
Subject: Re: [Tutor] Running a dos program with python

 

On Wed, Mar 10, 2010 at 4:51 PM, Armstrong, Richard J.
<rarmstro at water.ca.gov> wrote:

 

The dos program pops up and if I hit the enter key three times then it
runs. How can I add these three "enters" into the script?

 

I'm not at all sure if this way would work, but you could send the \r\n
through a pipe:

 

p = subprocess.Popen([file1, file2, file3], stdin=subprocess.PIPE)

p.communicate("\r\n\r\n\r\n") # Three windows line ending sequences.

 

it also may be possible to add them to the end of the last parameter:

'b.txt\r\n\r\n\r\n'

 

I don't have much faith that it will work, but you can certainly try!

 

HTH,

Wayne

 

Wayne thank you so much!

 

This worked beautifully:

 

import subprocess

 

p = subprocess.Popen([r'c:\shake91.exe', 'FLAC.txt', 'a.txt', 'b.txt'],
stdin=subprocess.PIPE)

p.communicate("\r\n\r\n\r\n") # Three windows line ending sequences.

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