python 安装库 报错 SSL: CERTIFICATE_VERIFY_FAILED 解决方法

目录

问题描述

临时解决方法

永久生效方法

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问题描述

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: )

临时解决方法

使用–trusted-host命令行选项

pip --trusted-host pypi.python.org install virtualenv

安装其他库的时候只要出现类似错误 均可以使用此方法

永久生效方法

在 $HOME/.pip/pip.conf 中加入trusted-host选项，该方法是一劳永逸

[global]
index-url = http://mirrors.aliyun.com/pypi/simple/
[install]
trusted-host=mirrors.aliyun.com