pip install os
pip install python-telegram-bot
setx TELEGRAM_TOKEN "~~~발급받은 토큰~~~"
--참고--
https://jungeunlee95.github.io/python/2019/06/22/Python-%ED%85%94%EB%A0%88%EA%B7%B8%EB%9E%A8-API%EB%A1%9C-%EC%B1%97%EB%B4%87-%EB%A7%8C%EB%93%A4%EA%B8%B0/
https://velog.io/@yvvyoon/python-telegram-bot