Close and open windows with tkinter -

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i have main window, , button inside of one, open window, closed button. how possible once latter closed can not reopen it? attach code of 2 programs.

first program

from tkinter import * def funzbottocli():import nuovaprova  root = tk()  root.state('zoomed')  root.title("gestionale")  bottoncli = button(root, text="  apertura altra finestra   ", fg=('red'),     font=('arial',10,'bold'), relief='raised', command=funzbottocli).place(x=20, y=20)  root.mainloop()  #second program tkinter import * def funzbottocli():fine_cli_ins.destroy()  fine_cli_ins = tk()  fine_cli_ins.title("inserimento anagrafica clienti")  fine_cli_ins.geometry('640x480+400+150')  form1 = frame(fine_cli_ins, bg='red',width=640, height=50, relief='raised',         border=3).pack()   label1 = label(fine_cli_ins, text=(" inserimento clienti "), fg=('red'),    bg=('gray'),    font=('arial',16,'bold'), relief='raised').place(x=200, y=10)  bottoncli = button(fine_cli_ins, text="      chiusura finestra      ", fg=('red'),    font=('arial',10,'bold'), relief='raised', command=funzbottocli).place(x=260, y=400)  fine_cli_ins.mainloop()

if want open , close multiple windows. proper way create single instance of tk , 1 or more instances of toplevel. program should exit when instance of tk destroyed.


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