old_contents: import sys
  
  if sys.version_info[:2] < (2, 7):
      import unittest2 as unittest
  else:
      import unittest
  
new_contents: import sys
  
  if sys.version_info[:2] < (2, 7):
      import unittest2 as unittest  # NOQA
  else:
      import unittest  # NOQA
  
  if sys.version_info < (3,):
      from mock import Mock, patch  # NOQA
  else:
      from unittest.mock import Mock, patch  # NOQA
  
  
  # Frosted doesn't yet support noqa flags, so this hides the imported/unused
  # complaints
  Mock, patch, unittest
  
subject: Make import mock.Mock or unittest.mock.Mock easier