def EnableTrafficItemByName( trafficItemNameList, condition='True' ):
    # condition: True or False

    for trafficItemName in trafficItemNameList:
        flag = 0
        for eachTrafficItem in ixNet.getList(ixNet.getRoot()+'traffic', 'trafficItem'):
            currentTrafficItemName = ixNet.getAttribute(eachTrafficItem, '-name')
            if trafficItemName == currentTrafficItemName:
                try:
                    print '\nEnableTrafficItemByName:', trafficItemName
                    ixNet.setAttribute(eachTrafficItem, '-enabled',  condition)
                    ixNet.commit()
                    flag = 1
                except Exception, errMsg:
                    print '\nEnableTrafficItemByName Error:', errMsg
                    return 1

        if flag == 0:
            print '\nEnableTrafficItemByName Error: No Traffic Item name found on configuration:', trafficItemName
            sys.exit()