倒计时是不可见的，我有一个错误

Question

我的问题是，如果我启动它的计数器是不可见的，如果我关闭PROGRAMM它给了我下面的错误：

File "C:\Users\****\AppData\Local\Programs\Python\Python36-32 
\lib\tkinter\__init__.py", line 1176, in update_idletasks 
    self.tk.call('update', 'idletasks') 
_tkinter.TclError: can't invoke "update" command: application has been destroyed 

这里我的代码：

from tkinter import * 
import tkinter.messagebox 
fenster = Tk() 
tkinter.messagebox.showinfo("", "Willkommen bei wer wird Millionär")#Welcome to who is Millionaire 
answer = tkinter.messagebox.askquestion("", "Möchtest du im Schweren Modus spielen? Der schwere modus bedeutet das du nur 2 Joker hast!")#Do you want to play in Hard mode?if you play in hardmode you only have 2 joker 
menu = Menu(fenster) 
fenster.config(menu=menu)#window 
frage = Label()#question 
frage.grid(row=0, column=1) 
ausgabe = Label()#output 
ausgabe.grid(row=4, column=1)#output 
jokerfrage = None 
zähler = Label(fg="black") 
zähler.grid(row=0, column=0) 
x = 0 
v = IntVar() 

def fiftyfifty(): 
    subMenu.delete("50/50", index2=None)#Fiftiy fifty Joker 


def fiftyfifty1(): 
    subMenu.delete("1.50/50", index2=None)#Fiftiy fifty Joker 


def fiftyfifty2(): 
    subMenu.delete("2.50/50", index2=None)#Fiftiy fifty Joker 


def publikum(): 
    print("Publikum ist nicht anwesend tut mir leid!")#Sorry there is no people that can help you 


def jokerfragen(): 
    global jokerfrage 
    jokerfrage = tkinter.messagebox.askquestion("", "Hör auf nachzudenken und benutz lieber einen Joker!")#Stop thinking use a joker! 


def antwortr(): 
    frage.configure(text="Glückwunsch deine antwort war richtig")#Greetings youre answers whas right 
    ausgabe.configure(text="50") 
zähler.after(29000, jokerfragen)#wich joker he wants 


def antwortf(): 
    frage.configure(text="Deine antwort wahr falsch damit bist du ausgeschieden!")#Sorry youre answer whas wrong you lost the game 


def vändern1(): 
    v = 1 
    if v == 1: 
     knopf1 = Button(text="Einlocken", command=antwortr)#Lock in 
     knopf1.grid(row=3, column=1) 


def vändern2(): 
    v = 2 
    if v == 2: 
     knopf1 = Button(text="Einlocken",command=antwortf)#Lock in 
     knopf1.grid(row=3, column=1) 


if answer == "no": 
    subMenu = Menu(menu) 
    menu.add_cascade(label="Joker", menu=subMenu) 
    subMenu.add_command(label="1.50/50", command=fiftyfifty1)#2 wrong question go away 
    subMenu.add_command(label="2.50/50", command=fiftyfifty2)#2 wrong question go away 
    subMenu.add_separator() 
    subMenu.add_command(label="1.Publikum Befragen", command=publikum)#ask other people joker 
    subMenu.add_command(label="2.Publikum Befragen", command=publikum)#ask other people joker 
    x = x + 1 
if answer == "yes": 
    subMenu = Menu(menu) 
    menu.add_cascade(label="Joker", menu=subMenu) 
    subMenu.add_command(label="50/50", command=fiftyfifty) 
    subMenu.add_separator() 
    subMenu.add_command(label="Publikum Befragen", command=publikum)#ask other people joker 
    x = x + 1 

# Frage 1 
if x == 1: 
    frage.configure(text="Wie heist das heilige Buch der Christen?")#What is the Holy book of the Christians 
    Radiobutton(fenster, text="Bibel", variable=v, value=1, command=vändern1).grid(row=1, column=0) 
    Radiobutton(fenster, text="Thora", variable=v, value=2, command=vändern2).grid(row=1, column=1) 
    Radiobutton(fenster, text="Koran", variable=v, value=3, command=vändern2).grid(row=2, column=0) 
    Radiobutton(fenster, text="Tipitaka", variable=v, value=4, command=vändern2).grid(row=2, column=1) 


def counter_label(): 
    while True: # keeps looping forever 
     for counter in range(30, -1, -1): # loops backwards from 30 up to and including 0 
      zähler.config(text = str(counter)) 
      zähler.after(1000, count) 
     sleep(1000) 
while jokerfrage is None: 
    fenster.mainloop(10) 
    fenster.update() 
    fenster.update_idletasks() 
if jokerfrage == "yes": 
    wjokerfrage = tkinter.messagebox.askquestion("", "50/50 ist Ja Publikum Befragen ist nein")#wich Joker you want 50/50 is yes ask other poeple joker is no 
if jokerfrage == "no": 
    tkinter.messagebox.showinfo("", "Ok ich werde dir weitere 30 sekunden zum nackdenken geben")#ok i'll give you 30 more seconds to think 
mainloop() 

所以这是我的整个节目，我是新来的Python，这是我校第一个“大”项目，但我有我不能没有你们正确的许多问题。

Answer 1

你在这里。这是您程序的工作代码。正如我在我以前的评论中所说的那样，问题是你从来没有把你的功能放在首位。所以你从来没有真的有过counter_label()。

def counter_label(count):   
    label['text'] = count 

    if count > 0: 
     fenster.after(1000, counter_label, count-1) 
    else: 
     dostuff() 

label = Label(fenster) 
label.grid() 
counter_label(30) 

def dostuff(): 
    print("hi")