best way to process local file and update Titan graph database

best way to process local file and update Titan graph database

I am newbie to Titan graph database.
I am trying to process local data, and insert them into titan db.
I am looking for the program language or script language that can do fast
way to process local data and update/insert titan db.
bulbs, is python interface, using REST API to update titan db. but I see
sometimes the program hang over there.
Can I use shell script to process the file, and call gremlin script to
update titan db?
Thanks a lot for advice.