a popen question. Please help

[ivanko.rus at gmail.com]

First, I think you should use subprocess.Popen (it's recommended by  
PEP-324) instead of os.popen. For example:

p = subprocess.Popen(["top"], stdout = PIPE)
p.stdout.readlines()

And to write to stdin (in your case "q") you can use p.stdin.write("q"), or  
terminate the process with p.terminate(), or just specify the -n option  
(the number of iterations) to the value you desire. It's done in that way:  
subprocess.Popen(["top","-n 1"], stdout=PIPE)
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