Tkinter - Flowing to a different window

Since you want to display only one window at a time, you could define the various "screens" as tk.Frames and use the lift method to display the right frame:

import Tkinter as tkclass Page(tk.Frame):    def __init__(self, master, text, height, width, *args, **kwargs):        tk.Frame.__init__(self, *args, borderwidth=20, **kwargs)        self.height = height        self.width = width        button = tk.Button(self, text=text, font=('Comic Sans MS', 20),                           command=lambda: self.callback())        button.pack(side="top", fill="both", expand=True)    def onlift(self):        root.geometry('{}x{}'.format(self.width, self.height))        self.lift()class App(tk.Frame):    def __init__(self, *args, **kwargs):        tk.Frame.__init__(self, *args, **kwargs)        p1 = Page(self, 'This is page 1', height=200, width=300)        p2 = Page(self, 'Next page is 2', height=400, width=300)        p3 = Page(self, 'We love number 3', height=400, width=600)        p1.callback = p2.onlift        p2.callback = p3.onlift        p3.callback = p1.onlift        p1.place(x=0, y=0, relwidth=1, relheight=1)        p2.place(x=0, y=0, relwidth=1, relheight=1)        p3.place(x=0, y=0, relwidth=1, relheight=1)        p1.onlift()root = tk.Tk()app = App(root)root.mainloop()

So in your case, you could define other subclasses of tk.Frame, and use them in place of Page.