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From: Jean-Michel Pichavant on 30 Jul 2010 12:28
Paul Lemelle wrote:
> JM,
>
> Thanks for the response.
>
> I am trying to capture the stdout of a program from another program.
> Example, I want to launch the below program from a second python
> script then capture the first's program stdout to a file or variable.
>
> Is this possible?
>
> Thanks again,
> Paul
>

use the subprocess module.

import subprocess
proc = subprocess.Popen(['echo', 'Hello World'], stdout=subprocess.PIPE,
stderr=subprocess.PIPE )
out, err = proc.communicate()
print out
>> Hello World


more details here

http://docs.python.org/library/subprocess.html



JM
From: Jean-Michel Pichavant on 2 Aug 2010 04:50
Paul Lemelle wrote:
> Hi JM,
>
> My last dumb question: When I try to run the below script as an
> executable, I get the following error:
> pttdev(a)pttTestVM:~$ ./argv.py 4
> import: unable to open X server `/tmp/launch-c8feFG/org.x:0' @
> import.c/ImportImageCommand/361.
> ./argv.py: line 8: syntax error near unexpected token `print'
> ./argv.py: line 8: ` print x'
>
> The script:
> # Writing the output to a standard argv argument
>
> #!/usr/bin/env python
>
> import sys
>
> for x in sys.argv:
> print x
>
>
> #END
>
> Any idea why?
>
> Thanks,
> Paul
>

Please don't remove python-list.

I see 2 possibilities:

1/ this is related to the open X server, for that I can't help you,
something related to your exported display if you're remotely logged on
the machine
2/ you are using python 2.x syntax within a python 3 interpreter. Try
"print (x)".


JM
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