code: def get_incomplete_assessment_sections(self, assessment_taken_id):
          
          section_list = []
          for section in self.get_assessment_sections(assessment_taken_id):
              if not section.is_complete():
                  section_list.append(section)
          return objects.AssessmentSectionList(section_list, runtime=self._runtime, proxy=self._proxy)
docs: Gets the incomplete assessment sections of this assessment.
  
          arg:    assessment_taken_id (osid.id.Id): ``Id`` of the
                  ``AssessmentTaken``
          return: (osid.assessment.AssessmentSectionList) - the list of
                  incomplete assessment sections
          raise:  IllegalState - ``has_assessment_begun()`` is ``false``
          raise:  NotFound - ``assessment_taken_id`` is not found
          raise:  NullArgument - ``assessment_taken_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure occurred
          *compliance: mandatory -- This method must be implemented.*