python - How to allow a tkinter window to be opened multiple times -


i making makeshift sign in system python. if enter correct password brings new admin window. if enter wrong 1 brings new window says wrong password. if exit out of 1 of windows , try enter password again breaks. tkinter.tclerror: can't invoke "wm" command: application has been destroyed there way prevent if enters wrong password don't need restart app? 

import tkinter tkinter import *  #define root window root = tkinter.tk() root.minsize(width=800, height = 600) root.maxsize(width=800, height = 600)  #define admin window admin = tkinter.tk() admin.minsize(width=800, height = 600) admin.maxsize(width=800, height = 600) admin.withdraw()  #define wrong window wrong = tkinter.tk() wrong.minsize(width=200, height = 100) wrong.maxsize(width=200, height = 100) wrong.withdraw() label(wrong, text="sorry password incorrect!", font=("arial", 24), anchor=w, wraplength=180, fg="red").pack()  #admin sign in label areadmin = label(root, text="administrator sign in", font=("arial", 18)) areadmin.pack()  #password label , password passwordlabel = label(root, text="password: ", font=("arial", 12)) passwordlabel.place(x=300, y=30)  #password entry adminpasswordentry = entry(root) adminpasswordentry.place(x=385, y=32.5)  #function button def getenteredpassword():     enteredpassword = adminpasswordentry.get()     if enteredpassword == password:         admin.deiconify()     else:         wrong.deiconify()  #enter button password passwordenterbutton = button(root, text="enter", width=20, command=getenteredpassword) passwordenterbutton.place(x=335, y=60)   mainloop()

i don't know tkinter fix code, hope it's proper fix.

  1. create toplevel windows not tk. dialog windows, opposed tk window must unique. same & feel, same methods
  2. create windows when needed, , each time. else, closing them using close gadget destroys them.

fixed code, enter wrong or password many times want without crash:

import tkinter tkinter import *  password="good"  #define root window root = tkinter.tk() root.minsize(width=800, height = 600) root.maxsize(width=800, height = 600)    #admin sign in label areadmin = label(root, text="administrator sign in", font=("arial", 18)) areadmin.pack()  #password label , password passwordlabel = label(root, text="password: ", font=("arial", 12)) passwordlabel.place(x=300, y=30)  #password entry adminpasswordentry = entry(root) adminpasswordentry.place(x=385, y=32.5)  #function button def getenteredpassword():     enteredpassword = adminpasswordentry.get()     if enteredpassword == password:         admin = tkinter.toplevel()         admin.minsize(width=800, height = 600)         admin.maxsize(width=800, height = 600)         #admin.withdraw()     else:         wrong = tkinter.toplevel()         wrong.minsize(width=200, height = 100)         wrong.maxsize(width=200, height = 100)         label(wrong, text="sorry password incorrect!", font=("arial", 24), anchor=w, wraplength=180, fg="red").pack()   #enter button password passwordenterbutton = button(root, text="enter", width=20, command=getenteredpassword) passwordenterbutton.place(x=335, y=60)   mainloop()

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