How to exit a program with an error message in Tkinter?

Question

Python

Good evening everyone. Recently asked to implement a program with a graphical interface. For this, I used the Tkinter library. For full-fledged work, I wanted to make a normal program reaction to various errors, i.e. if an error occurs, a message is displayed on the screen, and then the program closes. I implemented it this way:

if (summToPay >= maxPayment):
            log.after(0, print_error('You have exceeded the maximum payment amount\n'))
            root.after(5000, exit())

But in this scenario, the program simply ends after 5 seconds and nothing more, but if you replace exit with quit, then nothing happens.
Tell me what can be done about it?

Answer 1

There are dialog libraries for such needs, if you want it to come out as a typical error message, then this will help you:
from tkinter import messagebox
root = Tk()
...
if summToPay >= maxPayment:
messagebox.showerror('Error!' , 'You have exceeded the maximum payment amount\n')
exit() or root.destroy()
If you want a typical warning, replace showerror with showwarning.
PS Read Lutz, "Python Programming"