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How to open External Programs using Tkinter?

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  • Last Updated : 24 Jan, 2021
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Prerequisite: Tkinter, os

Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Python. Python with Tkinter is the fastest and easiest way to create GUI applications.  In this article, we will learn how to open an external program using Tkinter. Here we will use the system() method in the os module.


  • First, we will import the required library
  • Then we create an object, which will ask for a file that you want to open
  • To open that file we will use the system() method from the os Module.


os.system(‘”%s”‘ % File Path)

Below is the Implementation:


# Import Library
from tkinter import *
import os
from tkinter.filedialog import askopenfilename 
# Create Object 
root = Tk() 
# Set geometry
def open_file(): 
    file = askopenfilename()
    os.system('"%s"' % file)
Button(root, text ='Open'
       command = open_file).pack(side = TOP, 
                                 pady = 10
# Execute Tkinter


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