Yum fails with ImportError: cannot import name _

Issue

• Running yum update fails with the following traceback:

  # yum update
  Traceback (most recent call last):
    File "/usr/bin/yum", line 28, in ?
      import yummain
    File "/usr/share/yum-cli/
  
  ", line 28, in ?
      from yum import plugins
    File "/usr/lib/python2.4/site-packages/yum/
  
  ", line 38, in ?
      from yum import _
  ImportError: cannot import name _