Python Threading with Event object -

i've seen lot of python scripts use threads in class , lot of them use threading.event(). example:

class timerclass(threading.thread):     def __init__(self):         threading.thread.__init__(self)         self.event = threading.event()      def run(self):         while not self.event.is_set():             print "something"             self.event.wait(120) 

in while loop, why check condition if don't set self.event?

because else set it.

you start thread in 1 part of application , continue whatever do:

thread = timerclass() thread.start() # stuff 

the thread it's stuff, while stuff. if want terminate thread call:

thread.event.set() 

and thread stop.

so answer is: event, in case, not used controlling thread inside thread object itself. used controlling thread outside (from object holds reference thread).