Software :: Fedora 12 - Unable To Use The Yum

I installed of the packages and i created a local respository and i installed packages from local respository when ever i am offline this might have lead to these kind of errors listed below

Error 1:
[root@satheesh ~]# yum update
There was a problem importing one of the Python modules

required to run yum. The error leading to this problem was:

cannot import name range_tuple_normalize 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:

2.6.2 (r262:71600, Aug 21 2009, 12:22:21)
[GCC 4.4.1 20090818 (Red Hat 4.4.1-6)]

I have gone through the link given above and i had a guess that my problem might be Q.7 and followed the instruction given there.i downloaded packages given there and tryed to install it using rpm i got an error again(Error 3)

Error 2:
[root@satheesh Packages]# python
Python 2.6.2 (r262:71600, Aug 21 2009, 12:22:21)
[GCC 4.4.1 20090818 (Red Hat 4.4.1-6)] on linux2

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