How to use the proximity.ScanDevice function in proximity

self.scanner.doStop()
        else:
            mac = self.proxi.dev_mac
            if self.pauseMode:
                mac = self.lastMAC
                was_paused = True
            else:
                self.pausePressed(None)
                was_paused = False
            self.wTree.get_widget("labelBtnScanChannel").set_label(_("Stop sca_nning"))
            self.wTree.get_widget("channelScanWindow").show_all()
            self.scanningChannels = True
            dialog = gtk.MessageDialog(message_format=_("The scanning process tries to connect to each of the 30 possible ports. This will take some time and you should watch your bluetooth device for any actions to be taken. If possible click on accept/connect. If you are asked for a pin your device was not paired properly before, see the manual on how to fix this."),buttons=gtk.BUTTONS_OK)
            dialog.connect("response", lambda x,y: dialog.destroy())
            dialog.run()
            self.scanner = ScanDevice(mac,self.modelScan,was_paused,self.btnScanChannel_done)
        return 0