def _update_indexes(self, dbo):
        try:
            old_dbo = json_decode(self.redis.get(dbo.dbo_key))
        except __HOLE__:
            old_dbo = None

        for ix_name in dbo.dbo_indexes:
            new_val = getattr(dbo, ix_name, None)
            old_val = old_dbo.get(ix_name) if old_dbo else None
            if old_val == new_val:
                continue
            ix_key = 'ix:{}:{}'.format(dbo.dbo_key_type, ix_name)
            if old_val is not None:
                self.delete_index(ix_key, old_val)
            if new_val is not None and new_val != '':
                if self.get_index(ix_key, new_val):
                    raise NonUniqueError(ix_key, new_val)
                self.set_index(ix_key, new_val, dbo.dbo_id)
dataset/ETHPy150Open genzgd/Lampost-Mud/lampost/datastore/redisstore.py/RedisStore._update_indexes