debian换源，安装python3.8，安装opencv

debian换源，安装python3.8，安装opencv

换源：
https://www.cnblogs.com/wudonghang/p/8e0b1c5ef4f570a3eab4367080a80a11.html
python3.8安装：
https://blog.csdn.net/buddyfly/article/details/103066410
安装opencv：
https://www.pianshen.com/article/5838346168/