yum update command returns "Bad magic number in /usr/bin/_weakref.pyc" ?

Solution Verified - Updated -

Issue

  • On yum update, yum command returns Bad magic number in /usr/bin/_weakref.pyc.
# yum update
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   Bad magic number in /usr/bin/_weakref.pyc

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

Environment

  • Red Hat Enterprise Linux 6

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