How Do I Make Time.sleep() Work With Tkinter?

I'm trying to show a sequence of numbers on the screen at regular intervals. I'm new to python so it may be something obvious but I have tried .after and pygame.time.wait, but nei

Solution 1:

I assume you want to show new number in place of old number, not below it.

import tkinter as tk
import random

def start():
    # hide button
    button.pack_forget()
    # run `add_number` first time
    add_number(level+2)

def add_number(x):

    num = random.randint(1, 100)
    my_list.append(num)
    label['text'] = num

    if x > 0:
        # repeat after 2000ms (2s)
        root.after(2000, add_number, x-1)
    else:
        # show button again after the end
        button.pack()      

# --- main ---

my_list = []
level = 1

root = tk.Tk()

label = tk.Label(root)
label.pack()

button = tk.Button(root, text="Click to start game", command=start)
button.pack()

root.mainloop()

Solution 2:

Just use this simple command in your function root.update()