解决pip is configured with locations that require TLS/SSL, however the ssl module in Python is not

• 错误信息：win10，anaconda3环境下使用pip报错——pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available
• 原因：没有添加环境变量。在win10中安装anaconda后使用pip需要将下面三个目录添加到环境变量： D:\Anaconda3;
  D:\Anaconda3\Scripts;
  D:\Anaconda3\Library\bin
  
• 解决：添加环境变量
  按下win+q打开搜索框，输入environment进入编辑环境变量，然后修改环境变量（将缺的添加到系统环境变量中）

参考:https://stackoverflow.com/questions/45954528/pip-is-configured-with-locations-that-require-tls-ssl-however-the-ssl-module-in