Update parameter in realtime using python

[Fireandsmoke 5]

I've got a list of coordinates in a .txt file and I'd like to be able to create a loop which iterates over these values and pipes them into a parameter, so I can watch that parameter animate in realtime (as though I was middle mouse dragging over a parameter, for example).  
So far, by importing the data as a for loop and applying it on each iteration to the parameter, it doesnt work.. it will just update once on applying the script, but wont continuously update in the parameter in the viewport as new values are iterated over and assigned. 

Is there a way to achieve this? Using python 3, preferably.

Thanks for the tips. 
 

Edited December 26, 2020 by Fireandsmoke