来源：
https://blog.csdn.net/qhd1994/article/details/79852449
https://morvanzhou.github.io/tutorials/data-manipulation/scraping/5-01-selenium/
安装
pip3 install selenium- goto https://github.com/mozilla/geckodriver/releases to download selenium for Firefox.
- 解压，加可执行权限，复制到
/usr/local/bin