threads

[Bart Nessux]

Thank you both for the info on threads in Python it was very helpful to 
me, I've written something that I think can benefit from threading... 
here is the code, I copied this from a few books and a few Web examples 
and modified it to suit my test:

class trivialthread(threading.Thread):
    def url_open(self):
       for x in xrange(999999):
          f = urllib.urlopen("http://xxx.xxx.xxx")
          f.read()
          f.close()
          print self, x

if __name__ == '__main__':
    threads = []
    for x in range(15):
       thread = trivialthread()
       threads.append(thread)
    for thread in threads:
        thread.start()
    while threading.activeCount() > 0:
        print str(threading.activeCount()), "threads running incl. main"
        time.sleep(1)

However, when this runs, the output looks like this:

16 threads running incl. main
1 threads running incl. main
1 threads running incl. main
1 threads running incl. main
1 threads running incl. main
1 threads running incl. main
1 threads running incl. main
...
...

Why does the 16 appear initially and then be replaced by 1? Are there no 
longer 16 threads running? If so, why not?

TIA!!!