ryu安装

$ python3 -V
Python 3.7.2

$ git clone https://github.com/faucetsdn/ryu.git
$ cd ryu
$ sudo pip3 install .

让 ryu-manager 使用 python3: 修改 bin/ryu-manager

#!/usr/bin/env python3

验证：

$ ryu-manager

参考资料

https://ryu.readthedocs.io/en/latest/getting_started.html

https://ryu.readthedocs.io/en/latest/developing.html

https://osrg.github.io/ryu-book/en/Ryubook.pdf