How Do I Get The Output Of Tkinter To Print Into GUI Instead Of CLI?

I have been working on with this code and I get my output to the terminal. How do i get the output to print in the tkinter GUI window insted? Here's the code: import sys import os

Solution 1:

Use subprocess instead of os.system. There are many functions to work with external command.

I use subprocess.check_output() to get result of executed command. Command has to be as list ["ping", entry.get(), "-c", "2"]. Command can be single string if you use shell=True.

import tkinter as tk
import subprocess

def ping():
    cmd = ["ping", entry.get(), "-c", "2"]
    output = subprocess.check_output(cmd)
    #output = subprocess.check_output("ping {} -c 2".format(entry.get()), shell=True)

    print('>', output)
    # put result in label
    result['text'] = output.decode('utf-8')

my_gui = tk.Tk()
entry = tk.StringVar()

my_gui.geometry('300x300')
my_gui.title("Get output inside GUI") 

tk.Label(my_gui, text="Enter target IP or host as required.").pack() 
tk.Entry(my_gui, textvariable=entry).pack()
tk.Button(my_gui,text="Ping Test", command=ping).pack() 

# label for ping result
result = tk.Label(my_gui)
result.pack()

my_gui.mainloop()

BTW: because ping takes some time so tkinter will freeze for this time. If you need non-freezing version you will need other functions in subprocess or threading module.