使用YUM安装软件提示报错在网上搜寻很多帖子均未能解决问题

[root@iZ94y7aaiclZ tar]# whereis python
python: /usr/bin/python2.6 /usr/bin/python /usr/lib/python2.6 /usr/lib64/python2.6 /usr/local/bin/python2.7-config /usr/local/bin/python /usr/local/bin/python2.7 /usr/local/lib/python2.7 /usr/include/python2.6 /usr/share/man/man1/python.1.gz
[root@iZ94y7aaiclZ tar]# yum
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:
2.7.3 (default, Apr 27 2016, 14:59:31)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)]

If you cannot solve this problem yourself, please go to
the yum faq at:
  http ://yum.baseurl.org/wiki/Faq


   使用YUM安装软件提示报错, 在网上搜寻很多帖子均未能解决问题.

   有说是python的版本问题(比如同时安装了两个版本, 导致版本不匹配), 也找了资料进行配置, 但是还是不行.  

   yum我也重新装了一次, 但是还是无法解决问题.

求给位大虾帮忙解决问题, 感激不尽.