多协成队列Cannot choose from an empty sequence

Question

部分代码如下

def job():
    global read_count, work, log,ip_list
    read_count = ReadCount('data/教师账号.xlsx')
    read_count.run()
    log = Log('data/报错日志.xlsx')
    get_ip = IP(
        'http://http.tiqu.letecs.com/getip3?num=20&type=1&pro=&city=0&yys=0&port=11&time=1&ts=0&ys=0&cs=0&lb=1&sb=0&pb=4&mr=1&regions=&gm=4')
    get_ip.run()
    ip_list=get_ip.ip_list
    work = Queue()
    for i in read_count.count:
        work.put_nowait(read_count.count[i])
    tasks = []
    for i in range(2):
        task = gevent.spawn(crawler)
        tasks.append(task)
    gevent.joinall(tasks)

    log.quit()
    read_count.quit()
    print('执行一次')


def crawler():
    while not work.empty():
        for i in range(3):
            item = work.get(block=True,timeout=1)
            print(work.qsize())
            time.sleep(1)

Answer 1

work.get(block=True,timeout=1)是循环了三次，如果你的队列只有一个数据，第二次循环的时候，队列就空，所以报错了，改成这样试试：

def crawler():
    while not work.empty():
        for i in range(3):
            if not work.empty():
                item = work.get(block=True,timeout=1)
                print(work.qsize())
                time.sleep(1)