安装：
$ pip install speedtest-cli
使用：
$ speedtest-cli --bytes
Retrieving speedtest.net configuration...
Retrieving speedtest.net server list...
Testing from Hangzhou Alibaba Advertising Co.,Ltd. (101.200.85.155)...
Selecting best server based on latency...
Hosted by China Telecom ZheJiang Branch (Hangzhou) [4.87 km]: 29.972 ms
Testing download speed........................................
Download: 53.27 Mbyte/s
Testing upload speed..................................................
Upload: 9.06 Mbyte/s
扩展阅读：
speedtest-cli命令行下测试服务器外网速度
https://www.ttlsa.com/linux/use-speedtest-cli-test-internet-speed/
简介：
网站的安装和使用
