使用 tkinter 在 python 中創建菜單時出錯

Question

如您所見，每當我要運行代碼時，都會顯示如下錯誤（ _tkinter.TclError: unknown option "-Label" ）Label function 有什么問題？

from tkinter import *
    
def donothing():
    print("It's just an example")
    
window = Tk()
    
menu = Menu(window)
window.config(menu=menu)
    
submenu = Menu(menu)
menu.add_cascade(Label="File", menu=submenu)
submenu.add_command(Label="New File", command=donothing)
submenu.add_command(Label="Save", command=donothing)
submenu.add_command(Label="Save As", command=donothing)
submenu.add_separator()
submenu.add_command(Label="Exit", command=donothing)
    
submenu2 = Menu(menu)
submenu2.add_cascade(Label="Edit", menu=submenu2)
submenu2.add_command(Label="Undo", command=donothing)
    
window.mainloop()

Answer 1

你可能正在尋找這個

from tkinter import *
    
def donothing():
    print("It's just an example")
    
window = Tk()
    
menu = Menu(window)
window.config(menu=menu)
    
submenu = Menu(menu,tearoff=False)
menu.add_cascade(label="File", menu=submenu)
submenu.add_command(label="New File", command=donothing)
submenu.add_command(label="Save", command=donothing)
submenu.add_command(label="Save As", command=donothing)
submenu.add_separator()
submenu.add_command(label="Exit", command=donothing)
    
submenu2 = Menu(menu)
submenu2.add_cascade(label="Edit", menu=submenu2)
submenu2.add_command(label="Undo", command=donothing)
    
window.mainloop()