text: import unittest
  import sys
  
  class ImportDottedNamesTest(unittest.TestCase):
  
      def test_dotted_fromname(self):
          from unittest.gui import TestCaseGui
          self.assertTrue(TestCaseGui is not None)
  
  class ImportFromModulesTest(unittest.TestCase):
  
      def test_from_submodule(self):
          # Try to delete the module from the internal module list
          # sys.modules is a reference on Sk.sysmodules 
          # Should allow a fresh import -> testing the intended feature
          try:
              del sys.modules["unittest"]
          except:
              pass
  
          try:
              del sys.modules["unittest.gui"]
          except:
              pass
  
          from unittest import gui as mystuff
          self.assertTrue(mystuff is not None)
  
  
  class ImportRelativeTest(unittest.TestCase):
  
      def test_relative_import(self):
          import importable_module
  
          self.assertEqual(importable_module.version, "toplevel")
  
          import subpackage
  
          self.assertEqual(subpackage.imported_version, "subpackage")
  
          self.assertEqual(subpackage.implicit_import.__name__, "subpackage.implicit_import")
  
  
  
  if __name__ == '__main__':
      unittest.main()
  