Question

I have a testing script that needs to open a process (a Pyro server), do some stuff that will call the opened process for information, and when it s all done will need to close the process back down. It s all part of an automated test on a staging server.

In python 2.6 you can do this:

pyro_server = subprocess.Popen([ python ,  pyro_server.py ])
# Do stuff, making remote calls to the Pyro server on occasion
pyro_server.terminate()

Alas, I m locked into python 2.4 here at work so I don t have access to that function. And if I just let the script end of course the server lives on. What should I be doing to close/kill that process before the script exits?

Answer 1

Consider copying subprocess.py to your python2.4 dist-packages directory. It should just work as it s a simple wrapper around the old popen library.
The Popen object terminate function does nothing more than the following:

import os, signal

os.kill(pid, signal.SIGKILL)

pid is the child process s process id. signal.SIGKILL is the number 9, and is a standard unix kill signal. You can see how to spawn a subprocess and get its pid in python 2.4 with the popen module here:

Answer 2

@BrainCore: Note that os.kill is not available on windows in python24, check the docs.

My solution for killing a subprocess.Popen object on windows when using python24 is this:

import os, subprocess
p = subprocess.Popen(...)
res = os.system( taskkill /PID %d /F  % p.pid)

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