code: def __assert_false(returned):
          '''
          Test if an boolean is False
          '''
          result = "Pass"
          if isinstance(returned, str):
              try:
                  returned = bool(returned)
              except ValueError:
                  raise
          try:
              assert (returned is False), "{0} not False".format(returned)
          except AssertionError as err:
              result = "Fail: " + six.text_type(err)
          return resulf __assert_false(returned):
          '''
          Test if an boolean is False
          '''
          result = "Pass"
          if isinstance(returned, str):
              try:
                  returned = bool(returned)
              except ValueError:
                  raise
          try:
              assert (returned is False), "{0} not False".format(returned)
          except AssertionError as err:
              result = "Fail: " + six.text_type(err)
          return result
docs: Test if an boolean is False