[Tkinter] Is it the right way to create a second window?

[aquerci]

hi guys,

I'm writing a graphical interface with Tkinter for some of my scripts and I would very like to know what do you think about my code because unfortunately I'm not an expert. I started to study Tkinter just recently.

my software should have a main window with many buttons, each of them associated to a specific menu (a new window). if you click one of them, the main window will close itself and a new window will open. if you close the latter, the main window will appear again, and from there you can choose another button to go ahead with a new window and so on. of course, if you close the main window, the software will be close definitivally.

to accomplish this goal, I wrote this code, it works but I wanted to know your opionions. from your side is it a good code? is it the right way to implement the behaviour that I just explained before?

#!/usr/bin/python3

from tkinter import *
from tkinter import ttk


class MainWindow:
    
    def __init__(self, master):
        # definisco gli attributi della finestra principale:     
        self.master = master
        master.title("My Software")
        master.iconbitmap("icon.ico")
        master.geometry("500x400+250+250")
        master.resizable (width=False, height=False)
        master.configure(background="#f0f0f0")
        # definisco i diversi widget di quest afinestra:
        ttk.Button(master, text = "Menu 1", command = self.__Open).pack()
    
    def __Open(self):
        ntw = Tk()
        app = SecondWindow(self.master, ntw)
        ntw.mainloop()

class SecondWindow:
    
    def __init__(self, mw, master):
        # chiudo la finestra principale:
        mw.destroy()        
        # definisco gli attributi della finestra "ntw":     
        self.master = master
        master.title("My Software - Menu 1")
        master.iconbitmap("icon.ico")
        master.geometry("500x400+250+250")
        master.resizable (width=False, height=False)
        master.configure(background="#f0f0f0")        
        # se chiudo la finestra:
        master.protocol("WM_DELETE_WINDOW", self.__CloseEvent)
    
    def __CloseEvent(self):
            self.master.destroy()
            main()
        
def main():
    root = Tk()
    app = MainWindow(root)
    root.mainloop()

if __name__ == "__main__":
    main()

I'm not sure about my code because to go ahead with a new window I must to destroy the main window, and create it again when I destroy the second window. maybe is it better don't destroy the main window?