sample multi window application

multiwin-app.py

#!/usr/sbin/env python
from tkinter import *
from tkinter import ttk

win = Tk()

def create_frame1():
    global show_frame2, frame1
    frame1 = ttk.Frame(win)
    lbl = ttk.Label(frame1, text='Frame1', font='Times 35')
    lbl.grid(row=0, column=0)
    bt = ttk.Button(frame1, text='Next', command=show_frame2)
    bt.grid(row=1, column=0)
    frame1.grid()

def show_frame1():
    global frame2, create_frame1
    try:
        frame2.destroy()
    except:
        pass
    create_frame1()

def create_frame2():
    global show_frame3, show_frame1, frame2
    frame2 = ttk.Frame(win)
    lbl = ttk.Label(frame2, text='Frame2', font='Times 35')
    lbl.grid(row=0, column=0)
    bt1 = ttk.Button(frame2, text='Next', command=show_frame3)
    bt1.grid(row=1, column=1)
    bt2 = ttk.Button(frame2, text='Back', command=show_frame1)
    bt2.grid(row=1, column=0)
    frame2.grid()
    
def show_frame2():
    global farme1, frame3, create_frame2
    try:
        frame3.destroy()
    except:
        frame1.destroy()
    create_frame2()

def create_frame3():
    global show_frame2, frame3
    frame3 = ttk.Frame(win)
    lbl = ttk.Label(frame3, text='Frame3', font='Times 35')
    lbl.grid(row=0, column=0)
    bt1 = ttk.Button(frame3, text='Back', command=show_frame2)
    bt1.grid(row=1, column=0)
    bt2 = ttk.Button(frame3, text='Quit', command=win.destroy)
    bt2.grid(row=1, column=1)
    frame3.grid()

def show_frame3():
    global frame2, create_frame3
    try:
        frame2.destroy()
    except:
        pass
    create_frame3()

show_frame1()