Return sorted list of tuples.

def get_fncsortnt(self):
        """Return sorted list of tuples."""
        if 'dcnt' in self.prt_attr['flds']:
            if 'D1' in self.prt_attr['flds']:
                return lambda ntgo: [ntgo.NS, ntgo.depth, -1*ntgo.dcnt, ntgo.D1, ntgo.alt]
            else:
                return lambda ntgo: [ntgo.NS, ntgo.depth, -1*ntgo.dcnt, ntgo.alt]
        else:
            return lambda ntgo: [ntgo.NS, -1*ntgo.depth, ntgo.alt]