Integration between a Python script and Java program
I'm not sure if this is even possible, but is there any way to keep the python script in a state where it wouldn't have to completely re-run from the start every single time?

The correct and most obvious way to do this is to re-implement (if you can) the Python script and turn it into some kind of Remote Serivce and use some kind of Interface:
Examples:

Web Service over JSON
Web Service over RPC, JSON-RPC, XML-RPC

You would then access the service(s) remotely over a network connection from your Java program and serialize parameters passed to the Python program and theh results back to Java via something both can speak eaisly. e.g: JSON
I fiddled around with calling a python script from a Java program for a little while and was finally able to get it working. However, When I called it I noticed that there is a certain call in the python script that creates an object that takes a couple of seconds (which is longer than I'd like). So in an essence every time the script runs it has to re-import a few libraries and create a new object. I'm not sure if this is even possible, but is there any way to keep the python script in a state where it wouldn't have to completely re-run from the start every single time?
Any help would be greatly appreciated. I do not have much experience with the integration of programs with different languages.
Thank you very much!!! Any suggestions are welcome.