yum 运行时提示There was a problem importing one of the Python modules required to run yum. The error lead

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, Sep 25 2012, 13:28:17) 

[GCC 4.1.2 20080704 (Red Hat 4.1.2-52)]

If you cannot solve this problem yourself, please go to 

the yum faq at:

  http://wiki.linux.duke.edu/YumFaq
查看python版本

python -V

Python 2.7.3

whereis python

python: /usr/bin/python /usr/bin/python2.4 /usr/lib/python2.4 /usr/include/python2.4 /usr/local/python2.7 /usr/share/man/man1/python.1.gz

修改yum的python版本

which yum

vi /usr/bin/yum

修改第一句内容为以下

/usr/bin/python2.4

#!/usr/bin/python2.4

再次运行就正常了