[Tkinter] tkinter: after issue

[Larz60+]

you could write your timer as a method, and have it call your change image upon completion like example below

example replace None with your method:

import tkinter as tk
from datetime import datetime


class TkSimpleTimer:
    def __init__(self, parent):
        self.parent = parent


    def timeit(self, t_time):
        start_time = datetime.now().strftime("%H:%M:%S:%f")
        print(f"\nTimer started at: {start_time}, will delay {t_time} ms")
        self.parent.after(t_time, None)
        end_time = datetime.now().strftime("%H:%M:%S:%f")
        print(f"Timer finished at: {end_time}")

if __name__ == '__main__':
    root = tk.Tk()
    tst = TkSimpleTimer(root)
    for i in range(5):
        # time is in miliseconds
        tst.timeit(i*1000)
    root.destroy()
    root.mainloop()

Output:
Timer started at: 12:37:38:872230, will delay 0 ms
Timer finished at: 12:37:38:872285

Timer started at: 12:37:38:872302, will delay 1000 ms
Timer finished at: 12:37:39:873420

Timer started at: 12:37:39:873499, will delay 2000 ms
Timer finished at: 12:37:41:874964

Timer started at: 12:37:41:875117, will delay 3000 ms
Timer finished at: 12:37:44:875973

Timer started at: 12:37:44:876150, will delay 4000 ms
Timer finished at: 12:37:48:876959