How to close tkintermessagebox when it's running inside a loop?

Question

I'm trying to make the tkinter message box appears every X seconds, and I succeeded in that but the messagebox isn't closing after pressing the cancel button, how can I fix that?

here is the code:

import Tkinter as tk
import tkMessageBox, time

root = tk.Tk()
root.withdraw()
tkMessageBox.showinfo('TITLE', 'FIRST MESSAGE')

def f():
    tkMessageBox.showinfo('TITLE', 'SECOND MESSAGE')
    tkMessageBox.showinfo('TITLE', 'THIRD MESSAGE')
    time.sleep(15)
while True:
    f()

Answer 1

The sleep call freezes the application. You can use the after method to repeat a function call.

import Tkinter as tk
import tkMessageBox, time

root = tk.Tk()
root.withdraw()
tkMessageBox.showinfo('TITLE', 'FIRST MESSAGE')

def f():
    tkMessageBox.showinfo('TITLE', 'SECOND MESSAGE')
    tkMessageBox.showinfo('TITLE', 'THIRD MESSAGE')
    root.after(15000, f) # call f() after 15 seconds
    
f()

input('Press Enter to exit')   # or root.mainloop()