old_contents: """
  run with:
      nosetests test.py
  
  """
  import unittest
  import collections
  import sys
  import nose
  
  from traceback_hl import Colorize
  
  
  def calc():
      collections.OrderedDict('awef')
  
  
  class TestHelloWorld(nose.plugins.PluginTester, unittest.TestCase):
  
      activate = '--color'
      plugins = [Colorize()]
  
      def makeSuite(self):
          return unittest.TestSuite()
  
      def test_basic(self):
          try:
              calc()
          except Exception:
              traceback = sys.exc_traceback
              frame = traceback.tb_frame
              self.assertTrue(hasattr(frame, 'f_lineno'))
              self.assertTrue(hasattr(frame, 'f_code'))
              code = frame.f_code
              self.assertTrue(hasattr(code, 'co_filename'))
  
  
  
  if __name__ == '__main__':
      nose.main(addplugins=[Colorize()])
  
new_contents: """
  run with:
      nosetests test.py
  
  """
  import unittest
  import collections
  import sys
  import nose
  
  from my_code.traceback_hl import Colorize
  
  
  def calc():
      collections.OrderedDict('awef')
  
  
  class TestHelloWorld(nose.plugins.PluginTester, unittest.TestCase):
  
      activate = '--color'
      plugins = [Colorize()]
  
      def makeSuite(self):
          return unittest.TestSuite()
  
      def test_basic(self):
          try:
              calc()
          except Exception:
              traceback = sys.exc_traceback
              frame = traceback.tb_frame
              self.assertTrue(hasattr(frame, 'f_lineno'))
              self.assertTrue(hasattr(frame, 'f_code'))
              code = frame.f_code
              self.assertTrue(hasattr(code, 'co_filename'))
  
  
  
  if __name__ == '__main__':
      nose.main(addplugins=[Colorize()])
  
subject: Fix import error