报错内容

  1. WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f23793d4cd0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/flask/

image.png

原因一：默认的pip源速度慢，更换国内源

  1. pip install Flask -i https://pypi.tuna.tsinghua.edu.cn/simple

如果有报一下错误 image.png 添加--trusted-host参数
``` pip install requests -i http://pypi.douban.com/simple —trusted-host pypi.douban.com

  2. <a name="ac698b26"></a>
  3. ## 原因二：DNS的问题

vim /etc/docker/daemon.json { “registry-mirrors”: [“https://ha71jh17.mirror.aliyuncs.com“], “dns”: [“114.114.114.114”, “8.8.8.8”] } ```