MAJOR: Program does not run scripts after compiling

[rian-kh]

The compiled program using PyInstaller can't use the subprocess.Popen("python script.py") because the python interpreter isn't included. It can however use exec() but this leads to issues with how to save/terminate it, and subprocess doesn't seem to be usuable to call only functions like exec() (..?).

Tried switching from using subprocess to multiprocessing (branch: multiprocess):

• Program can run the script, but there's no way to terminate it because the process variable (p) can't be referenced outside of runTraining() (p is not defined)

What should happen:

1. Pressing "Start training" starts a thread that runs the process of running trainGPT2.py through exec(). (Works)
2. Pressing "Save and end training" sends a SIGINT signal to the process, forcing it to save. (Doesn't work)