Problems with making time delay

Question

I am trying to displey a few labels for exact amount of time and than forget them. I tried with sleep() and time.sleep(), but the program started after time I have defined and than executes lines. Here is part of my program:

from time import sleep
from tkinter import*
from tkinter import ttk
root = Tk()
root.geometry('700x700+400+100')
root.overrideredirect(1)
myFrame=Frame(root)
label1=Label(myFrame, text='Warning!', font=('Arial Black', '26'), fg='red')


myFrame.pack()
label1.pack()

sleep(10)



myFrame.pack_forget()
label1.pack_forget()

But when I run the program it wait for 10 seconds and than executes the lines (frame and label are packed and than immediatly forget).

I hope it is clear, what problem I have.

@DonkeyKong I want to display label1 for 10 seconds and than forget it. — Luka1
– Luka1, Commented Apr 6, 2015 at 17:44
@DonkeyKong like I said: 10 sec it do nothing and than executes all the program I wrote (make root, set its geometry, etc.), but label1 is (I think so) packed (.pack) and than immediatly forget (.pack_forget()). — Luka1
– Luka1, Commented Apr 6, 2015 at 18:00

miradulo · Accepted Answer · 2015-04-07 10:46:05Z

2

Use the Tkinter after method instead of time.sleep(), as time.sleep() should almost never be used in a GUI. after schedules a function to be called after a specified time in milliseconds. You could implement it like this:

myFrame.after(10000, myFrame.pack_forget)
label1.after(10000,label1.pack_forget)

Note that after does not ensure a function will occur at precisely the right time, it only schedules it to occur after a certain amount of time. As a result of Tkinter being single-threaded, if your app is busy there may be a delay measurable in microseconds (most likely).

edited Apr 7, 2015 at 10:46

answered Apr 6, 2015 at 18:36

miradulo

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