Pythontelegram bot在telegram 上失败.error.TimedOut，无法重新启动(在重新启动时获取coroutine'；Updater.start_polling'；从未等待过)

我试图为我的学校创建一个简单的Telegram机器人(这样学生就可以用Telegram接收时间表更新).我用python-telegram-bot来做这个.以下是我从official tutorial中摘取的代码:

application = telegram.ext.ApplicationBuilder().token(token).build()

incoming_message_handler = telegram.ext.MessageHandler(
    telegram.ext.filters.TEXT & (~telegram.ext.filters.COMMAND),
    process_incoming_message
)

start_handler = telegram.ext.CommandHandler(
    'start',
    process_start_command
)

application.add_handler(start_handler)
application.add_handler(incoming_message_handler)
application.run_polling()

它工作得很好，但我们没有那么好的互联网连接，我的机器人不时地崩溃与telegram.error.TimedOut.

因此，我决定使用无限循环并try --除了重新连接:

while True:
    try:
        application = telegram.ext.ApplicationBuilder().token(token).build()

        incoming_message_handler = telegram.ext.MessageHandler(
            telegram.ext.filters.TEXT & (~telegram.ext.filters.COMMAND),
            process_incoming_message
        )

        start_handler = telegram.ext.CommandHandler(
            'start',
            process_start_command
        )

        application.add_handler(start_handler)
        application.add_handler(incoming_message_handler)
        application.run_polling()
        
        break # exit the infinite loop
    except telegram.error.TimedOut:
        print('trying again')

但是，我没有一次又一次地try ，而是在第二次try 时得到了这个错误:

Traceback (most recent call last):
  File "bot.py", line 24, in __init__
    application.run_polling()
  File "~/.local/lib/python3.10/site-packages/telegram/ext/_application.py", line 765, in run_polling
    return self.__run(
  File "~/.local/lib/python3.10/site-packages/telegram/ext/_application.py", line 939, in __run
    loop.add_signal_handler(sig, self._raise_system_exit)
  File "/usr/lib/python3.10/asyncio/unix_events.py", line 99, in add_signal_handler
    self._check_closed()
  File "/usr/lib/python3.10/asyncio/base_events.py", line 515, in _check_closed
    raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed
sys:1: RuntimeWarning: coroutine 'Updater.start_polling' was never awaited