thread join() not stopping

[Peter Otten]

mclaugb wrote:

> When i add the print (or other) function into the run method--the thread
> fails to stop after 2 seconds which the join(2) should ensure.

The calling thread waits until the thread you call join() upon stops or 2
seconds have passed -- whatever occurs first.


import time
from threading import Thread

class MyThread(Thread):
    tick = 0.1
    def __init__(self, seconds):
        Thread.__init__(self)
        self.n = int(seconds/self.tick)
    def run(self):
        for i in range(self.n):
            time.sleep(self.tick)
            print "running"

def measure(seconds):
    print "Run for %.2f seconds..." % seconds
    t = MyThread(seconds)
    t.setDaemon(True)
    t.start()
    starttime = time.time()
    t.join(1) # wait one second
    stoptime = time.time()
    print stoptime-starttime
    t.join() # wait for how long t takes to terminate
    print "...done"

if __name__=="__main__":
    measure(1.5)
    measure(0.5)

Peter