start_screen.py

import tkinter as tk



class StartScreen:
    window = tk.Tk()
    window.geometry("400x300")
    window.wm_attributes("-topmost", 1)
    window.resizable(False, False)
    window.title("Start Game Screen")

    def __init__(self):
        self.lbl = tk.Label(master=self.window, text="Start Game")
        self.start_btn_zero = tk.Button(master=self.window, text="Start Game With Zero")
        self.start_btn_no_zero = tk.Button(master=self.window, text="Start Game Without Zero")
        self.number_of_digits = tk.Listbox(master=self.window)
        self.number_of_computers = tk.Spinbox(master=self.window, from_=2, to=4, width=5)




    def create_start(self):
        self.lbl.pack()
        self.add_lines()
        self.number_of_digits.pack()
        tk.Label(master=self.window, text="How many computers will play?").pack()
        self.number_of_computers.pack()
        self.number_of_digits.select_set(0)
        self.start_btn_zero.pack()
        self.start_btn_no_zero.pack()
        self.window.mainloop()

    def add_lines(self):
        for i in range(4, 7):
            self.number_of_digits.insert(i, f"Number of digits:{i}")

    def destroy_window(self):
        self.window.withdraw()