urllib2.URLError: <urlopen error [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure>` pyhton2.7 版本需要 python 2.7.9+ 参考链接: https://github.com/pytorch/pytorch/issues/3193#issuecomment-338165421