Python virtualenv安装库报错SSL: CERTIFICATE_VERIFY_FAILED
问题描写叙述
使用pip依照virtualenv报错，例如以下：
pip install virtualenv
Collecting virtualenv
/opt/python27/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:315: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#snimissingwarning.
SNIMissingWarning
Could not fetch URL https://pypi.python.org/simple/virtualenv/: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:590) - skipping
Could not find a version that satisfies the requirement virtualenv (from versions: )解决的方法
使用–trusted-host命令行选项
pip --trusted-host pypi.python.org install virtualenv转载请以链接形式标明本文地址
本文地址：http://blog.csdn.net/kongxx/article/details/51187482