已经装了MySQL-python，但在引用时报错：ImportError: No module named MySQLdb

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导入MySQLdb模块的时候报错，如下
>>> import MySQLdb
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named MySQLdb

在网上找了一个解决方法：
yum install MySQL-python  （centos系统）

再次导入的时候还是报错，怀疑是版本问题：
$ python --version
Python 2.7.10

$ cat /etc/issue
CentOS release 5.11 (Final)
Kernel \r on an \m

这个版本的系统默认装的是python2.4的模块：

$ rpm -ql MySQL-python
/usr/lib64/python2.4/site-packages/MySQL_python-1.2.3c1-py2.4.egg-info
/usr/lib64/python2.4/site-packages/MySQL_python-1.2.3c1-py2.4.egg-info/PKG-INFO
/usr/lib64/python2.4/site-packages/MySQL_python-1.2.3c1-py2.4.egg-info/SOURCES.txt
/usr/lib64/python2.4/site-packages/MySQL_python-1.2.3c1-py2.4.egg-info/dependency_links.txt
/usr/lib64/python2.4/site-packages/MySQL_python-1.2.3c1-py2.4.egg-info/top_level.txt
/usr/lib64/python2.4/site-packages/MySQLdb
........
........

解决方法：
1，在官网下载MySQL-python-1.2.5。https://pypi.python.org/pypi/MySQL-python
2，unzip  MySQL-python-1.2.5.zip
3,安装
cd MySQL-python-1.2.5
python setup.py build
python setup.py install

再次装载模块的时候还是报错：
>>> import MySQLdb
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "build/bdist.linux-x86_64/egg/MySQLdb/__init__.py", line 19, in <module>
  File "build/bdist.linux-x86_64/egg/_mysql.py", line 7, in <module>
  File "build/bdist.linux-x86_64/egg/_mysql.py", line 6, in __bootstrap__
ImportError: libmysqlclient.so.18: cannot open shared object file: No such file or directory

根据最后提示，应该是找不着一个交libmysqlclient.so.18的文件，于是到mysql安装目录里找到这个文件并且做一个软连接到/usr/lib
ln -sv /usr/local/ver01/percona/lib/libmysqlclient.so.18 /usr/lib64/libmysqlclient.so.18

再次装载模块的时候不再报错了。