centOS7创建python虚拟环境

参考:

非常棒的2篇博客

https://www.centos.bz/2018/05/centos-7-4-%E5%AE%89%E8%A3%85python3%E5%8F%8A%E8%99%9A%E6%8B%9F%E7%8E%AF%E5%A2%83/

https://blog.csdn.net/qq_41865652/article/details/85100264