How can I disable database lock in sqlite with python?

I made a application in python and it should read and write simultaneously in multiple instances(multi CMD widows)(multi-threading). each thread is configured independently so it will not change the data that written with other instances. so in action app instance 1 will work with John's data and app instance 2 will work with Jane's data and so On. the application concept is simple enough but in action when running multiple instances at once, there may be a situation that I get database locked error and the app will stop working. I want to disable this locking system, because its not necessary in my application, I designed it Independent just for this reason. can anybody tell me to do it in python? is it possible? where should I place a code or sql command or anything?