How to use the openweave.WeaveDeviceMgr.SystemTest_ProductList.keys function in openweave

: thermostat
            : topaz
        """

        args = shlex.split(line)

        if (len(args) != 2):
            print "Usage:"
            self.do_help('start-system-test')
            return

        productName = args[0]
        testId = int(args[1])

        if productName not in WeaveDeviceMgr.SystemTest_ProductList.keys():
            print "Unknown product for system tests: %s" % productName
            print "Usage:"
            self.do_help('start-system-test')
            return

        try:
            self.devMgr.StartSystemTest(WeaveDeviceMgr.SystemTest_ProductList[productName], testId)
        except WeaveDeviceMgr.DeviceManagerException, ex:
            print str(ex)
            return

        print "Start system test complete"