This class represents an action that should be run only after a certain amount of time has passed -- a timer. Timer is a subclass of Thread and as such also functions as an example of creating custom threads.
Timers are started, as with threads, by calling their start() method. The timer can be stopped (before its action has begun) by calling the cancel() method. The interval the timer will wait before executing its action may not be exactly the same as the interval specified by the user.
def hello(): print "hello, world" t = Timer(30.0, hello) t.start() # after 30 seconds, "hello, world" will be printed