time.sleep() Equivalent on Tkinter

Question

I have to stop a loop and resume after many seconds. I tried to use after(), but the loop don\'t freeze. And when I use time.sleep() (works out tkinter), tkinter freeze. Have an

Answer 1

To create an analog of:

for message in listOfMessages:
    time.sleep(message.time)
    change(message)

in tkinter:

def update_widget(app, messages):
    message = next(messages, None)
    if message is None: # end of the loop
        return
    delay = int(message.time * 1000) # milliseconds
    app.after(delay, change, message) # execute body
    app.after(delay, update_widget, app, messages) # next iteration

update_widget(app, iter(listOfMessages))

If you want to wait until change(message) finishes before continuing the loop:

def iterate(message, app, messages):
    change(message)
    update_widget(app, messages)

def update_widget(app, messages):
    message = next(messages, None)
    if message is None: # end of the loop
        return
    delay = int(message.time * 1000) # milliseconds
    app.after(delay, iterate, message, app, messages)

update_widget(app, iter(listOfMessages))