第一次安装：
easy_install MySQLdb失败找不到包名，原因是名称错误
正确的是：
pip install MySQL-python然后编译报错：
Command "/usr/bin/python2.7 -c "import setuptools, tokenize;__file__='/tmp/pip-build-VQ6tqp/MySQL-python/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-ZRqghi-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-VQ6tqp/MySQL-python
原因是mysql-devel开发包没有安装
yum install mysql-devel
