我已经安装了python-telegram-bot，如下所示：
pip install python-telegram-bot
当我尝试这样做时：
from telegram.ext import Updater, CommandHandler, MessageHandler, Filters, CallbackContext
我收到此错误：
ImportError: cannot import name 'Filters' from 'telegram.ext' (/home/mobitnlh/virtualenv/db_application/3.8/lib/python3.8/site-packages/telegram/ext/__init__.py)