Oracle Linux6.3 yum :No module named yum

遇到的问题：

[root@hadoop01 ~]# cat /etc/issue
Oracle Linux Server release 6.3
Kernel \r on an \m

[root@hadoop01 ~]# yum

Could not find platform independent libraries <prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
'import site' failed; use -v for traceback
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:


   No module named yum


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:
2.6.6 (r266:84292, Jun 18 2012, 09:14:33) 
[GCC 4.4.6 20110731 (Red Hat 4.4.6-3)]


If you cannot solve this problem yourself, please go to 
the yum faq at:
  http://yum.baseurl.org/wiki/Faq
  
尝试解决
[root@hadoop01 ~]# python --version
Python 2.6.6


将#!/usr/bin/python修改为#!/usr/bin/python2.6
[root@hadoop01 ~]# vi /usr/bin/yum 
#!/usr/bin/python2.6

问题依旧未解决

和其他正常的机器比对以下几个相关的包：
python-2.6.6-29.el6_2.2.x86_64.rpm
python-devel-2.6.6-29.el6_2.2.x86_64.rpm
python-libs-2.6.6-29.el6_2.2.x86_64.rpm
python-urlgrabber-3.9.1-8.el6.noarch.rpm
yum-3.2.29-30.0.1.el6.noarch.rpm


发现该机器上多安装了：python-devel-2.6.6-52.el6.x86_64，删除后问题解决。
[root@hadoop01 soft]# rpm -e python-devel-2.6.6-52.el6.x86_64 --nodeps