Why won't my thread terminate?

[Dfenestr8]

Hello.

I read that a thread terminates when its run() method finishes.

I'm trying to terminate  the thread below by changing the value upon which a
while loop runs to 0.

But every time I try and get the thread running again, using the start()
method, I get:

"AssertionError: thread already started"

What am I doing wrong?

Here is the code for my thread......


class metroThread(threading.Thread):
        def __init__ (self):
                threading.Thread.__init__(self)
                self.cond = 1
                self.bpm = float(60)/100
                
        def run(self):
                while self.cond == 1:
                        self.mysound = tkSnack.Sound()
                        self.mysound.read('mm.wav')
                        self.mysound.play()
                        sleep(self.bpm)
                        
        def stop(self):
                self.cond = 0
                #this sets the condition for the run()
                #method to terminate naturally.
                #no need to be messy about destroying the thread.
                
        def play(self):
                self.cond = 1
        
        def setBPM(self, bpm):
                self.bpm = float(60)/bpm