It is hard understanding what your script does without all the previews turned on 
But i’ll try my best !
Have you tried creating a custom node ? You could create one such as this one :
- Input data : Name of the parameters you want to change + Value of those parameters
- What the node does : Change the parameters then save the file
It should not be very hard to accomplish that step (you script already does it 
).
Then, try feeding your custom node all the different names/values of the parameters and see if it solves your problem.
If not, you could try using my approach (the one with only one function), with the function being the custom node you created.
Hope this helps !