在用pip7.1.2版本安裝第三方模塊時出現瞭如下警告：
/usr/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90:
InsecurePlatformWarning: A true SSLContext object is not available.
This prevents urllib3 from configuring SSL appropriately and may
cause certain SSL connections to fail. For more information, see
https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.提示是由於urllib3的SSL連接失敗
解決方法
首先安裝python-devel libffi-devel openssl-devel
yum install python-devel libffi-devel openssl-devel
之後在安裝pyopenssl ndg-httpsclient pyasn1
pip install pyopenssl ndg-httpsclient pyasn1
在運行pip就不會出現警告了