def map_udev_uuids(forward=True, reverse=False):
devices = UserList(readout_attr(*readout_attr_presets['udev_uuid_links']))
if forward:
devices.to_uuid = dict(zip( [ p.device for p in devices ], [
p.uuid for p in devices ] ))
if reverse:
devices.to_dev = dict(zip( [ p.uuid for p in devices ], [
p.device for p in devices ] ))
return devices
