WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None))

linux安装request依赖包的时候运行 pip install requests  或者pip install requests -i https://pypi.tuna.tsinghua.edu.cn/simple  会报以下错误

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPConnection object at 0x7fb92878b8c0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pypi/simple/requests/

解决办法为运用阿里云的镜像下载包地址

pip install requests -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com