docs: def _get_entry_scores(self):
          """Takes entries from self._entries and returns a list of scores (or
          output scores, if based on grades)"""
          if self.get_gradebook_column().get_grade_system().is_based_on_grades():
              return [e.get_grade().get_output_score() for e in self._entries if e.is_graded()]
          else:
              return [e.get_score() for e in self._entries if e.is_graded()]