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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def prt_txt(self, prt=sys.stdout, pre=''):
 """Print letters, descendant count, and GO information."""

        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