Is it possible to run my program inside Tkinter?
I have a program which fits the curves. I want to make it GUI and looking for the ways to insert it into Tkinter.
I want my program to run after clicking a BUTTON widget.  Is there a option in Tkinter to run another file.py?
To run another file, you can import it, or load the data with

file = open("filename.txt", "r")

then use 

exec(string) 

to run the program inside it.
Run my program inside Tkinter program