Ndtyjky

I am trying to make a program with three screens with Tkinter, where pressing the button would change to the next screen. Here is a simplified example of the code I am trying to run.

Basically every time the mainloop is run, the program is testing based on the state of the variables scr1, scr2, and scr3 which screen should be displayed at that time.

I have tested that the functions are defined properly (i.e. the values of the variables scr1, scr2, and scr3 are being updated. However, I believe there is an issue regarding what happens after the functions GoToScreenTwo or GoToScreenThree are run (the program doesn't seem to be going back to the mainloop).

import tkinter as tk



scr1 = 1

scr2 = 0

scr3 = 0





def GoToSecondScreen():

    global scr1

    scr1 = 0

    global scr2

    scr2 = 1

    return()







def GoToThirdScreen():

    global scr2

    scr2 = 0

    global scr3

    scr3 = 1

    return()





def screen1():



    button1 = tk.Button(text="Begin", command = lambda: GoToSecondScreen())

    button1.grid()



def screen2():



    button1.grid_forget()

    button2 = tk.Button(text="Screen 2", command = lambda: GoToThirdScreen())

    button2.grid()



def screen3():



    button2.grid_forget()

    button3 = tk.Button(text="Screen 3")

    button3.grid()





root = tk.Tk()



if scr1 == 1 and scr2 == 0 and scr3 == 0: 

    screen1()

elif scr1 == 0 and scr2 == 1 and scr3 == 0:

    screen2()

elif scr3 == 1 and scr1 == 0 and scr2 == 0:

    screen3()



tk.mainloop()