Yum fails because of python files in /usr/bin overriding system libraries

Issue

• Yum fails with a backtrace similar to the following:

  # yum clean all
  Traceback (most recent call last):
    File "/usr/bin/yum", line 4, in <module>
      import yum
    File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 47, in <module>
      import tempfile
    File "/usr/lib64/python2.7/tempfile.py", line 32, in <module>
      import io as _io
    File "/usr/bin/io.py", line 10, in <module>
      writing of raw bytes to a stream. FileIO subclasses RawIOBase to provide
  ValueError: Attempted relative import in non-package
  

• Other python based commands may be also failing with backtraces reporting importing libraries from /usr/bin. For example:

  $ ansible-playbook playbook.yml --ask-become-pass
  Traceback (most recent call last):
    File "/bin/ansible-playbook", line 34, in <module>
      from ansible import context
    File "/usr/bin/ansible.py", line 7, in <module>
      from ... import types as t
  ValueError: Attempted relative import in non-package