code: def get_grade_entries_on_date(self, from_, to):
          
          # Implemented from template for
          # osid.relationship.RelationshipLookupSession.get_relationships_on_date
          grade_entry_list = []
          for grade_entry in self.get_grade_entries():
              if overlap(from_, to, grade_entry.start_date, grade_entry.end_date):
                  grade_entry_list.append(grade_entry)
          return objects.GradeEntryList(grade_entry_list, runtime=self._runtime)
docs: Gets a ``GradeEntryList`` effective during the entire given date range inclusive but not confined to the date range.
  
          arg:    from (osid.calendaring.DateTime): start of date range
          arg:    to (osid.calendaring.DateTime): end of date range
          return: (osid.grading.GradeEntryList) - the returned
                  ``GradeEntry`` list
          raise:  InvalidArgument - ``from`` is greater than ``to``
          raise:  NullArgument - ``from or to`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*