def GetDeviceGroupHandleNgpfPy( deviceGroupNumber='1' ):
    for topologyHandle in ixNet.getList(ixNet.getRoot(), 'topology'):
        for deviceGroupHandle in ixNet.getList(topologyHandle, 'deviceGroup'):
            match = re.match(r'::ixNet::OBJ-/topology:[0-9]+/deviceGroup:%s' % deviceGroupNumber, deviceGroupHandle)
            if match:
                return deviceGroupHandle

    return 0