exit entire process in threaded script

[Hank]

Hi, 

I have the following:

def readuser():
   ...check for user input then exit entire script

thread.start_new_thread(readuser,())

while(forever):
   ...do something


How can I exit the whole script from readuser()? sys.exit() only exits
that thread and not the entire process. I'm trying not to use any
win32 modules.

python 1.5
win2k

thanks