[Tutor] "Ctrl-C (unix)" in python

[pa yo]

I am  running my Twitter>>Wiki bots in infinite loops but can't find
an easy way to turn them off gracefully once I have started them. At
the moment I have to go into the terminal window where they are
running and type "Ctrl-C". (I am running Ubuntu 8.10 and python 2.5.2)

I was thinking that I could get the bot script to read a text file at
the start of the main loop and have a separate script writing the
"exit" order to the same text file.... but before I get too involved
with this I wanted to know if there  was an  built-in function to
switch scripts on and off.

Any help or assistance much appreciated.

Payo