import queue
import threading

def worker(work_queue):
    while True:
        if work_queue.empty():
            print("Task 1 Over!")
            work_queue.task_done()
            break
        else:
            _ = work_queue.get()
            print(work_queue.qsize())
            # do actual work

def main():
    work_queue = queue.Queue()
    for i in range(10):
        work_queue.put("Item %d" % (i + 1))

    t = threading.Thread(target=worker, args=(work_queue, ))
    t.setDaemon(True)
    t.start()
    print("Main Thread 1")
    work_queue.join()
    print("Main Thread 2")
    t.join()
    print("Finish!")

if __name__ == "__main__":
    main()