Linux下安装 MySQLdb模块

1，下载最新的MySQLdb安装包：

wget http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.3/MySQL-python-1.2.3.tar.gz/download

tar zxvf MySQL-python-1.2.3.tar.gz

cd MySQL-python-1.2.3

2，进入用户MySQLdb源码目录，运行 python setup.py build。

报错：ImportError: No module named setuptools

解决：安装setuptools

wget https://pypi.python.org/packages/source/s/setuptools/setuptools-19.2.tar.gz#md5=78353b1f80375ca5e088f4b4627ffe03

tar zxvf setuptools-19.2.tar.gz

cd setuptools-19.2

python setup.py build

sudo python setup.py install

3，进入用户MySQLdb源码目录，运行python setup.py install

4，继续，安装，安装完毕

>>> import MySQLdb
>>>

如果报错：ImportError: libmysqlclient.so.18: cannot open shared objectfile: No such file or directory

如果是64系统则：

#ln -s /usr/local/mysql/lib/libmysqlclient.so.18 /usr/lib64/libmysqlclient.so.18

再次import MySQLdb就正常了。

如果提示如下：

/usr/local/lib/python2.7/site-packages/MySQL_python-1.2.3-py2.7-linux-x86_64.egg/_mysql.py:3:UserWarning: Module _mysql was already imported from/usr/local/lib/python2.7/site-packages/MySQL_python-1.2.3-py2.7-linux-x86_64.egg/_mysql.pyc,but /mnt/MySQL-python-1.2.3 is being added to sys.path

原因是，install后MySQLdb模块已经被放到python的site-pachages目录中；但我在当前目录也存在相同的模块，所以可能会重复导入。只要切换到其他目录运行就可以了。