Windows中 cmd下：（退出飛機）
pip install beautifulsoup4
pip install requests

Requests庫文檔： https://requests.readthedocs.io/projects/cn/zh-cn/latest/

安裝完包目錄：Python\Lib\site-packages

BeautifulSoup的用法詳解  https://blog.51cto.com/u_15637561/5291223

https://beautifulsoup.readthedocs.io/zh-cn/v4.4.0/#