complete reinstall of yum

I got  the  error message :
 Traceback (most recent call last):
  File "/usr/bin/yum", line 28, in ?
    import yummain
  File "/usr/share/yum-cli/yummain.py", line 29, in ?
    import cli
  File "/usr/share/yum-cli/cli.py", line 30, in ?
    import output
  File "/usr/share/yum-cli/output.py", line 33, in ?
    from rpmUtils.miscutils import checkSignals
ImportError: cannot import name checkSignals

I reinstalled yum using the  yum -3.2.8  tar.bz  package and followed 
the instructions.
still get the same error message

Max