I'm thinking of simplifying the example to focus on its core goal of demonstrating how to enqueue tasks and then wait for them to be finished:

    import threading, queue

    q = queue.Queue()

    def worker():
        while True:
            item = q.get()
            print(f'Working on {item}')
            print(f'Finished {item}')
            q.task_done()

    # turn-on the worker thread
    worker_thread = threading.Thread(target=worker)
    worker_thread.daemon = True
    worker_thread.start()

    # send thirty task requests to the worker
    for item in range(30):
        q.put(item)
    print('All task requests sent\n', end='')    

    # block until all tasks are done
    q.join()
    print('All work completed')