code: def wr_xlsx(self, fout_xlsx="gos_depth01.xlsx", **kws):
          
          data_nts = self.get_d1nts()
          if 'fld2col_widths' not in kws:
              kws['fld2col_widths'] = {'D1': 6, 'NS':3, 'depth': 5, 'GO': 12, 'name': 40}
          if 'hdrs' not in kws:
              kws['hdrs'] = self.hdrs
          wr_xlsx_tbl(fout_xlsx, data_nts, **kws)
docs: Write xlsx table of depth-01 GO terms and their letter representation.