[Iñigo]

Originally Posted by godel10

Thanks Íñigo (Gracias Íñigo) , but I am in linux.

But, does anybody know what the script does? In other words, what is the input and what is the output?

Then it's much easier!
Install the requirements and run the script from the command line, as:

$ python script.py

Regarding the purpose of the script:
IREX devices store annotations in a special file (in fact the metadata sqlite3 database). This script merges these annotations "drawing" them in the pdf file. I.e., the resulting pdf file has the original pdf document contents plus the annotations drawings.

Iñigo