pip install requests ERROR: Could not find a version that satisfies the requirement requests

windows环境：

 

需要配置pip.ini文件

[global]
timeout = 6000
index-url = http://pypi.douban.com/simple
trusted-host = pypi.douban.com

 

查找pip.ini步骤：

   cmd中输入：%appdata% 

   找到pip文件夹下面的pip.ini