tkinter中的TclError

Question

所以这就是代码python似乎对我不太满意：

def checkAnswer(self, clickedButton):
            self.valueOne = self.itemOne[self.component]
            self.valueTwo = self.itemTwo[self.component]

            if clickedButton == 'left':
                if self.valueOne >= self.valueTwo:
                    tkinter.messagebox.showinfo('Smart Cookie!', 'That\'s correct!')

                else:
                    tkinter.messagebox.showerror('Oh No!', 'That\'s incorrect!')

            elif clickedButton == 'middle':
                if self.valueOne - (self.valueOne * 0.1) <= self.valueTwo <= self.valueOne + (self.valueOne * 0.1) and self.valueTwo - (itemTwoComp * 0.1) <= self.valueTwo <= self.valueTwo + (self.valueTwo * 0.1):
                    tkinter.messagebox.showinfo('Smart Cookie!', 'That\'s correct!')

                else:
                    tkinter.messagebox.showerror('Oh No!', 'That\'s incorrect!')

            elif clickedButton == 'right':
                if self.valueTwo >= self.valueOne:
                    tkinter.messagebox.showinfo('Smart Cookie!', 'That\'s correct!')

                else:
                    tkinter.messagebox.showerror('Oh No!', 'That\'s incorrect!')


            showQuestion()


        tkinter.mainloop()
        showQuestion()

gui = ProgramGUI()

这是我收到的错误：

Traceback (most recent call last):
  File "C:\Assignments\Assignment 2\FIddle.py", line 101, in <module>
    gui = ProgramGUI()
  File "C:\Assignments\Assignment 2\FIddle.py", line 99, in __init__
    showQuestion()
  File "C:\Assignments\Assignment 2\FIddle.py", line 60, in showQuestion
    self.lab11.configure(text = self.itemList[0]['Name'])
  File "C:\AppData\Local\Programs\Python\Python35\lib\tkinter\__init__.py", line 1330, in configure
    return self._configure('configure', cnf, kw)
  File "C:\AppData\Local\Programs\Python\Python35\lib\tkinter\__init__.py", line 1321, in _configure
    self.tk.call(_flatten((self._w, cmd)) + self._options(cnf))
_tkinter.TclError: invalid command name ".2531617022640.2531617023144"

我不确定为什么我会收到这个错误，如果有人能够发现问题，我将非常感激。

Answer 1

showQuestion()正在尝试修改窗口小部件，但是在根窗口被销毁后调用它（例如：在mainloop()之后返回，这只有在根窗口被销毁时才会发生）。当根窗口被销毁时，所有其他小部件也会被销毁。