公司测试机环境不知道给我卸了什么包，导致yum运行报错状况：

系统版本：Red Hat Enterprise Linux Server release 6.2 (Santiago)

内核版本：2.6.32-220.el6.x86_64


报错情况：

There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

  No module named sqlite

Please install a package which provides this module, or
verify that the module is installed correctly.

It's possible that the above module doesn't match the
current version of Python, which is:


一、升级或卸载Python导致：

1、查看已安装python的版本，可能是当前系统存在多个python导致
[root@test ~]# whereis python
python: /usr/bin/python2.6 /usr/bin/python /usr/bin/python2.6-config /usr/lib/python2.6 /usr/lib64/python2.6 /usr/include/python2.6 /usr/share/man/man1/python.1.gz
[root@test ~]# vi /usr/bin/yum
将 #!/usr/bin/python 修改为 #!/usr/bin/python2.6
如果是源代码安装的，默认路径是/usr/local/bin/python2.6,做个软链接即可
rm -rf /usr/bin/python
ln -s /usr/local/bin/python2.6 /usr/bin/python


二、完全重装python和yum

1、删除现有Python
[root@test ~]# rpm -qa|grep python|xargs rpm -ev --allmatches --nodeps ##强制删除已安装程序及其关联
[root@test ~]# whereis python |xargs rm -frv ##删除所有残余文件 ##xargs，允许你对输出执行其他某些命令
[root@test ~]# whereis python ##验证删除，返回无结果
2、删除现有的yum
[root@test ~]# rpm -qa|grep yum|xargs rpm -ev --allmatches --nodeps
[root@test ~]# whereis yum |xargs rm -frv
3、从http://mirrors.ustc.edu.cn/centos/6.4/os/x86_64/Packages/下载相应的包
python-2.6.6-36.el6.x86_64.rpm
python-devel-2.6.6-36.el6.x86_64.rpm
python-libs-2.6.6-36.el6.x86_64.rpm
python-pycurl-7.19.0-8.el6.x86_64.rpm
python-setuptools-0.6.10-3.el6.noarch.rpm
python-urlgrabber-3.9.1-8.el6.noarch.rpm   
python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm-python-4.8.0-32.el6.x86_64.rpm
yum-3.2.29-40.el6.centos.noarch.rpm
yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
yum-utils-1.1.30-14.el6.noarch.rpm
yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm      
yum-plugin-protectbase-1.1.30-14.el6.noarch.rpm
yum-plugin-aliases-1.1.30-14.el6.noarch.rpm
yum-plugin-downloadonly-1.1.30-14.el6.noarch.rpm
由于源中版本会更新，具体请查看URL中的版本再下载下来！
[root@test ~]# rpm -Uvh --replacepkgs python*.rpm
[root@test ~]# rpm -Uvh --replacepkgs rpm-python*.rpm yum*.rpm
可能之间还需要zlib和zlib-devel包，根据情况下载并安装！


三、运行python进行测试

[root@test ~]# python
Python 2.6.6 (r266:84292, Feb 22 2013, 00:00:18)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import yum
>>>
如上，要是什么都没报，则说明OK啦~