python队列实现多线程怎么做？

import threading

import time

import queue

def work(q):

    while True:

        if q.empty():

            return

        else:

            t = q.get()

            print("当前线程sleep {} 秒".format(t))

            time.sleep(t)

def main():

    q = queue.Queue()

    for i in range(5):

        q.put(i) 

thread_num = 5

    threads = []

    for i in range(thread_num):

        t = threading.Thread(target=work, args=(q,))

当前线程sleep 0 秒

当前线程sleep 1 秒