pip 报错：Can‘t connect to HTTPS URL because the SSL module is not available

windows：

• • 
    
• 将 D:\Python\anaconda3\Library\bin 加入环境变量
• 重启shell
  Linux：
  ​​ https://stackoverflow.com/questions/41328451/ssl-module-in-python-is-not-available-when-installing-package-with-pip3​​