def __init__(self, *args, **kwargs):
super(BandwidthMonitor, self).__init__(*args, **kwargs)
self.datapaths = {}
self.dpset = kwargs['dpset']
self.topo = Topology(cfgfile)
self.bwstats = BandwidthStats(self.topo)
self.monitor_thread = hub.spawn(self.monitor)
