Return the print fields in the go2nt namedtuple.

def _init_prt_flds(self):
        """Return the print fields in the go2nt namedtuple."""
        # Create namedtuple fields or copy namedtuple fields
        if 'go2nt' not in self.kws:
            return self.__init_prt_flds()
        else:
            return next(iter(self.kws['go2nt'].values()))._asdict()