How do I create an automatically updating GUI using Tkinter?

Question

from Tkinter import *
import time
#Tkinter stuff

class App(object):
    def __init__(self):
        self.root = Tk()

        self.labeltitle = Label(root, text=\"\         


        

Answer 1

I wrote an example with Python 3.7

from tkinter import *

def firstFrame(window):
    global first_frame
    first_frame = Frame(window)
    first_frame.place(in_=window, anchor="c", relx=.5, rely=.5)
    Label(first_frame, text="ATTENTION !").grid(row=1,column=1,columnspan=3)


def secondFrame(window):
    global second_frame
    second_frame= Frame(window, highlightbackground=color_green, highlightcolor=color_green, highlightthickness=3)
    second_frame.place(in_=window, anchor="c", relx=.5, rely=.5)
    Label(second_frame, text="This is second frame.").grid(row=1, column=1, columnspan=3, padx=25, pady=(15, 0))


window = Tk()
window.title('Some Title')
window.attributes("-fullscreen", False)
window.resizable(width=True, height=True)
window.geometry('300x200')


firstFrame(window)
secondFrame(window)
first_frame.tkraise()
window.after(5000, lambda: first_frame.destroy()) # you can try different things here
window.mainloop()