yum install gcc
Traceback (most recent call last):
  File "/usr/bin/yum", line 28, in ?
    import yummain
  File "/usr/share/yum-cli/yummain.py", line 24, in ?
    import cli
  File "/usr/share/yum-cli/cli.py", line 29, in ?
    import output
  File "/usr/share/yum-cli/output.py", line 27, in ?
    from yum.misc import sortPkgObj
ImportError: cannot import name sortPkgObj