user interface - python- using delay between tkinter's listbox prints -

all want make time delay between each print on listbox included on gui . havent managed result far. tried use time.sleep () ... , after method.

here code :

from tkinter import *  def func() :     = int (e.get())     x in range (0,i):         listbox.insert (end, i)         i-=1  master = tk() master.title("hi")   e=entry (master ) e.pack()  listbox = listbox(master) listbox.pack()  b = button(master, text="get", width=10, command=func) b.pack()  mainloop() 

when you're using gui, should use after instead of sleep. if sleep, gui stop updating, won't refreshed displays , nothing work want to.

to desired result in code, have several options. 1 of them using after call function inserts listbox , pass new argument each iteration.

first, you'll have modify button command pass initial argument function using lambda expression:

b = button(master, text="get", width=10, command=lambda: func(int(e.get()))) 

next, structure function this:

def func(arg):     listbox.insert(end, arg)      #insert arg     arg -= 1                      #decrement arg     master.after(1000, func, arg) #call function again after x ms, modified arg 

note: you'll need make function return if arg less 0, or it'll run forever ;)