所以我试图使我开发的Tkinter应用程序的主菜单，但这里的问题，当我点击按钮打开另一个文件，这是另一个窗口，它是确定的，但当我关闭该窗口，并试图通过点击主菜单中的相同按钮再次打开它，我得到这个错误：

Exception in Tkinter callback
Traceback (most recent call last):
  File "c:\users\alireza\anaconda3\Lib\tkinter\__init__.py", line 1702, in __call__
    return self.func(*args)
  File "menu.py", line 32, in open_main
    root.destroy()
  File "c:\users\alireza\anaconda3\Lib\tkinter\__init__.py", line 2059, in destroy
    self.tk.call('destroy', self._w)
_tkinter.TclError: can't invoke "destroy" command: application has been destroyed

字符串
这是我的主菜单文件（menu.py）：

from tkinter import *
import tkinter.messagebox
class Application:
    def __init__(self, master, *args, **kwargs):
        self.mainframe = Frame(master, width = 300, height = 400, bg = 'slategray1')
        self.mainframe.pack()
        self.main_button = Button (self.mainframe, width = 25, height = 2,bg = "SteelBlue2" , text = "Customer Service", command = self.open_main)
        self.main_button.place(x= 55, y =50 )
        self.add_to_db_button = Button (self.mainframe, width = 25, height = 2,bg = "SteelBlue2" , text = "Add Item To Inventory", command = self.open_add_to_db)
        self.add_to_db_button.place(x= 55, y =100 )
        self.update_button = Button (self.mainframe, width = 25, height = 2,bg = "SteelBlue2" , text = "Update Inventory Items", command = self.open_update)
        self.update_button.place(x= 55, y =150 )
        self.about_button = Button (self.mainframe, width = 25, height = 2,bg = "sea green" , text = "Credits", command = self.about)
        self.about_button.place(x= 55, y =300 )
        self.close_button = Button (self.mainframe, width = 25, height = 2,bg = "navajo white" , text = "Quit", command = self.close_window)
        self.close_button.place(x= 55, y =350 )
    def close_window(self, *args, **kwargs):
        root.destroy()
    def open_main(self, *args, **kwargs):
        import main
        root.destroy()
    def open_add_to_db(self, *args, **kwargs):
        import add_to_db
        root.destroy()
    def open_update(self, *args, **kwargs):
        from update import AppUpdate
        root.destroy()
    def about(self, *args, **kwargs):
        tkinter.messagebox.showinfo("About Me", "Programmed and designed by Alireza Bagheri.")
root = Tk()
root.title("Main Menu")
root.resizable(False, False)
b = Application(root)
root.geometry("301x401+0+0")
root.mainloop()

型
我不知道问题出在哪里，所以如果能给我指出正确的方向，