def desc_stats_reply_handler(self, ev):
    body = ev.msg.body
self.logger.info(
    'OFPDescStatsReply received: mfr_desc=%d hw_desc=%s sw_desc=%s serial_num=%s dp_desc=%s '
    , body.mfr_desc, body.hw_desc, body.sw_desc, body.serial_num, body.dp_desc)
Getting stats from ryu controller