Getting "AttributeError: 'module' object has no attribute 'Cmd'" when using yum

Issue

Getting following traceback when using yum :-

# yum update
Traceback (most recent call last):
  File "/usr/bin/yum", line 28, in <module>
    import yummain
  File "/usr/share/yum-cli/yummain.py", line 34, in <module>
    import cli
  File "/usr/share/yum-cli/cli.py", line 34, in <module>
    import shell
  File "/usr/share/yum-cli/shell.py", line 31, in <module>
    class YumShell(cmd.Cmd):
AttributeError: 'module' object has no attribute 'Cmd'