code: def prt_info(self, prt, sections=None):
          
          if sections is None:
              sections = self.grprobj.get_sections_2d()
          num_goids = 0
          for section_name, nts_flat in sections:
              num_nts = len(nts_flat)
              num_goids += num_nts
              prt.write("{N:3} GO IDs in section({SEC})\n".format(N=num_nts, SEC=section_name))
          prt.write("{N:3} GO IDs\n".format(N=num_goids))
docs: Print GO namedtuples in their sections.