code: def prt_txt(self, prt=sys.stdout, pre=''):
          
          data_nts = self.get_d1nts()
          for ntdata in data_nts:
              prt.write("{PRE}{L:1} {NS} {d:6,} D{D:02} {GO} {NAME}\n".format(
                  PRE=pre,
                  L=ntdata.D1,
                  d=ntdata.dcnt,
                  NS=ntdata.NS,
                  D=ntdata.depth,
                  GO=ntdata.GO,
                  NAME=ntdata.name))
          return data_nts
docs: Print letters, descendant count, and GO information.