python: subprocess.call threads problem

Hello people within the while True processing never ends, even if I use q.task_done, what is wrong?

fileQueue = Queue()
def submit(i, q):
    global filespath
    while True:
      filename = q.get()
      retVT = subprocess.call("python abc.py -f %s" % (filespath + filename), shell=True, stdout=open('/dev/null', 'w'), stderr=subprocess.STDOUT)
      retTH = subprocess.call("python def.py -a %s" % (filename), shell= True, stdout=open('/dev/null', 'w'), stderr=subprocess.STDOUT)
      q.task_done()


def main():
    global fileQueue

    开发者_Python百科num_threads = fileQueue.qsize()
    for i in range(num_threads):
       worker = Thread(target=submit, args=(i, fileQueue))
       worker.setDaemon(True)
       worker.start()
    fileQueue.join()

    print "Done" 

if name == 'main':
    main()

Thanks

What are the program listings for abc.py and def.py? Are you sure that the commands you are executing ever end? Try running it with the two subprocess.call() lines commented out and see if it works as intended. If it suddenly works, then the problem is somewhere related to the scripts you're calling outside of the code.