RedHat上安装MySQLdb
本来感觉应该很简单顺利的一件事情，在实际过程中却遇到了很多麻烦，对于一个linux新手来说，非常容易就被卡住，所以干脆给记下来
本来感觉应该很简单顺利的一件事情，在实际过程中却遇到了很多麻烦，对于一个linux新手来说，非常容易就被卡住，所以干脆给记下来吧，这样每天才能都进步一点！
手头上有一个现成的MySQL-python-1.2.3版本，算是比较新的，而且机器上的python还是2.4的，觉得有点老了，于是就想着升级一下python，刚好也有个python2.5版本的源码包，于是就开始升级。具体命令是：
升级python
tar zxvf python2.5.4.tar.gz
cd python2.5.4
./configure
make
make install
检查python的版本
执行python -V
奇怪，竟然还是显示2.4.3，经查询，这是因为直接执行python命令，执行的是usr/bin/python，这实际上是python2.4.3的一个硬连接，那将其修改成python2.5.4的硬连接不就行了？于是执行：
修改默认的python版本
ln -s /usr/bin/python2.5 /usr/bin/python
再次执行python -V，提示正确，说明升级成功，另外个人感觉还是使用源码包安装比较放心，尽管时间是稍微长了一点。
下面开始安装MySQLdb，按照README，先执行python setup.py build，发现各种错误，后来查了一下，应该先执行python ez_setup.py，会自动下载一个安装工具。本来这一步是对的，但是提示说找不到zlib，错误信息如下：
zipimport.ZipImportError: can't decompress data; zlib not available
奶奶的，真是麻烦啊，于是下载一个zlib的源码包安装。注意，一定要在安装完zlib之后，重新编译python！！！！
接着执行，python setup.py build，又提示找不到mysql.h等头文件，，在另一篇博文里，介绍了解决方法，就是下载一个mysql-devel....rpm包，安装之后在/usr/include/mysql里就有这些需要的头文件了。但是偏偏不巧，机器上已经有了一个mysql的5.0.7版本，我下载的devel包是5.1.4版本，执行rpm -ivh mysql-devel...rpm之后提示版本冲突，于是想到将mysql卸载，于是执行：
卸载旧版本的msyql
rpm -qa|grep mysql
执行
rpm -ev qt-msyql-.....
rpm -ev mysql-5.0.7.....
卸载完毕
安装完新版本的msyql-devel包后，头文件已经有了，再次安装MySQLdb：
安装MySQLdb模块
python setup.y build
python setup.py install
很顺利
检测MySQLdb
进入python，执行import MySQLdb，提示无误就OK了，有时会提示一堆乱七八糟的话，没关系，如果不放心，执行MySQLdb的Connection方法连接一个数据库就知道到底好不好使了!
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