Ubuntu 14.04 Install mysqlclient for Python2.7

Ubuntu14.04系统Python默认版本是2.7.6

pip升级后通过pip安装一些python包时报如下两个告警（SNIMissingWarning和InsecurePlatformWarning），其实是SSL的问题，urllib3需要pyopenssl 

2.安装依赖

sudo apt-get install python-dev libmysqlclient-dev

3.安装mysqlclient驱动

sudo pip install mysqlclient

报SNIMissingWarning和InsecurePlatformWarning告警

4.通过安装pyopenssl等依赖包解决这两个告警问题

sudo apt-get install libffi-dev libssl-dev

pip install cryptography

pip install pyopenssl ndg-httpsclient pyasn1

参考：https://urllib3.readthedocs.org/en/latest/security.html#snimissingwarning