import customtkinter as ctk
import threading
run = True
def task():
while run:
print('Task running...')
if not run:
print('Task closed')
return
def start_task():
global run
run = True
threading.Thread(target=task).start()
def close_task():
global run
run = False
root = ctk.CTk()
root.geometry('500x60')
ctk.CTkButton(root, text='start task', command=start_task).place(x = 20, y = 10)
ctk.CTkButton(root, text='close task', command=close_task).place(x = 220, y = 10)
root.mainloop()