def METHOD_NAME(self):
    ret_stat = []
    try:
        new_stats = self.get_stats()
        for intf in self.interface:
            down = new_stats[intf]["down"] - self.stats[intf]["down"]
            up = new_stats[intf]["up"] - self.stats[intf]["up"]
            total = new_stats[intf]["total"] - self.stats[intf]["total"]
            down = down / self.update_interval
            up = up / self.update_interval
            total = total / self.update_interval
            down, down_suffix = self.convert_b(down)
            up, up_suffix = self.convert_b(up)
            total, total_suffix = self.convert_b(total)
            self.stats[intf] = new_stats[intf]
            ret_stat.append(
                self.format.format(
                    interface=intf,
                    down=down,
                    down_suffix=down_suffix,
                    up=up,
                    up_suffix=up_suffix,
                    total=total,
                    total_suffix=total_suffix,
                )
            )
        return " ".join(ret_stat)
    except Exception:
        logger.exception("Net widget errored while polling:")