How to execute a Python program in Tkinter

Question

I have a simple Tkinter GUI, with one button and when the button is pushed I want it to run another program that I have written in Python.

 def openProgram ():
 #open up MyProgram.py
 MGui = Tk()
 MGui.geometry('450x450')
 mbutton = Button(text = "Go", command = openProgram).pack()

Seems easy enough, maybe I am not searching the correct terms.

Answer 1

You can call functions defined in another file by importing that file.

reticulator.py:

def main():
 print "reticulating splines..."
 #do stuff here
 print "splines reticulated"

gui.py:

from Tkinter import *
import reticulator
def openProgram():
 #call the `main` function defined in the other file
 reticulator.main()
MGui = Tk()
MGui.geometry('450x450')
mbutton = Button(text = "Go", command = openProgram).pack()
MGui.mainloop()

• scotty3785: This is a much better answer than the accepted one. Calling another python program using os.system shows a lack of understanding of modular programming.
• Pedroski: I want to open a Python program in its own window. Will this do that?

Answer 2

Try to use os.system:

import os os.system("MyProgram.py")

• eltel2910: Perfect! That's all I needed.
• vimal1083: What if MyProgram.py has to be executed in a virtualenv?