Can Python kill a child process that keeps on running?

[I. Myself]

Suppose we spawn a child process with Popen.  I'm thinking of an 
executable file, like a compiled C program.
Suppose it is supposed to run for one minute, but it just keeps going 
and going.  Does Python have any way to kill it?

This is not hypothetical; I'm doing it now, and it's working pretty 
well, but I would like to be able to handle this run-on condition.  I'm 
using Windows 2000, but I want my program to be portable to linux.

Thanks

Mitchell Timin

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