calling programs from python

[RR]

Hello,

I am trying to call a program in python as I would call it in the command
line. For example I want to do the following from python: command > file.
Then read this file. How do I call "command > file" ? Much help
appreciated.

-RR

[David MacQuigg]

On Mon, 01 Dec 2003 19:27:34 -0500, "RR" <er********@yahoo.com> wrote:

Hello,

I am trying to call a program in python as I would call it in the command
line. For example I want to do the following from python: command > file.
Then read this file. How do I call "command > file" ? Much help
appreciated.

Use os.system() For example, on Unix:

import os
os.system( 'command > file' ) and on Windows: os.system('start C:\Python23\python.exe')

-- Dave

[Kristofer Wouk]

David MacQuigg wrote:

On Mon, 01 Dec 2003 19:27:34 -0500, "RR" <er********@yahoo.com> wrote:

Hello,

I am trying to call a program in python as I would call it in the command
line. For example I want to do the following from python: command > file.
Then read this file. How do I call "command > file" ? Much help
appreciated.

Use os.system() For example, on Unix:

import os
os.system( 'command > file' )
and on Windows:
os.system('start C:\Python23\python.exe')

-- Dave

This will work too:

import os
os.popen('command > file')

Kris

[David MacQuigg]

On Tue, 02 Dec 2003 16:02:26 GMT, Kristofer Wouk
<kr*******@hotpop.com> wrote:
[...]

import os
os.popen('command > file')

This is a little confusing. Do you intend the output from 'command'
to go to 'file' or to the pipe you just opened?

If you are opening a pipe (to be read as a file object) I would
suggest something like this:

import os
file = os.popen('cat makefile | grep pyuic')
file.readlines() ['\tpyuic ModelSelector.ui > ModelSelector.py\n']

If you are just executing a command and not needing to process any
output from the command (other than its completion status), I would
stick with the more general:
import os
status = os.system('command > file')
status
0

--Dave

[Richard James]

David MacQuigg <sh****@127.0.0.1> wrote in message news:<k0********************************@4ax.com>. ..

On Mon, 01 Dec 2003 19:27:34 -0500, "RR" <er********@yahoo.com> wrote:

Hello,

I am trying to call a program in python as I would call it in the command
line. For example I want to do the following from python: command > file.
Then read this file. How do I call "command > file" ? Much help
appreciated.

Use os.system() For example, on Unix:

import os
os.system( 'command > file' ) and on Windows: os.system('start C:\Python23\python.exe')

-- Dave

Windows Python os module has os.startfile()

os.startfile('C:\Python23\python.exe')

-- Richard