write text table of depth-01 GO terms and their letter representation.

def wr_txt(self, fout_txt="gos_depth01.txt", title=None):
        """write text table of depth-01 GO terms and their letter representation."""
        with open(fout_txt, 'w') as prt:
            self.prt_header(prt, title)
            data_nts = self.prt_txt(prt)
            sys.stdout.write("  {N:>5} items WROTE: {TXT}\n".format(
                N=len(data_nts), TXT=fout_txt))