python3.7安装， 解决pip is configured with locations that require TLS/SSL问题
参考文章：
（1）python3.7安装， 解决pip is configured with locations that require TLS/SSL问题
（2）https://www.cnblogs.com/zmdComeOn/p/11712352.html
备忘一下。
来源：oschina
链接：https://my.oschina.net/u/3797416/blog/4905259