使用 tkinter 下拉菜单的 GUI 中没有显示

Question

from tkinter import *

def functionhi():
    print("hiiiiii")

root = Tk()

pikumenu = Menu(root)
root.config(menu=pikumenu)

submenu = Menu(pikumenu)

submenu.add_cascade(label="add",menu=submenu)

submenu.add_command(label="do",command=functionhi)

submenu.add_separator()
submenu.add_command(label="hiii",command=functionhi)

sourya= Menu(pikumenu)

sourya.add_cascade(label="exit",menu=sourya)

sourya.add_command(label="done",command=lambda:print("hiiii exit "))

root.mainloop()

Im not getting any display on the window.

Answer 1

When you do add_cascade you need to call it on the Main menu pikumenu instead of the submenus submenu and sourya .

Something else you may want to know for your project is when you define the submenus you might want to do Menu(pikumenu, tearoff=False) instead to disable the option for it to be opened in a second window which in my opinion is just really annoying

Fixed Code:

from tkinter import *

def functionhi():
    print("hiiiiii")

root = Tk()

pikumenu = Menu(root)


submenu = Menu(pikumenu, tearoff=False)



submenu.add_command(label="do",command=functionhi)

submenu.add_separator()
submenu.add_command(label="hiii",command=functionhi)
pikumenu.add_cascade(label="add",menu=submenu)

sourya= Menu(pikumenu, tearoff=False)

sourya.add_command(label="done",command=lambda:print("hiiii exit "))
pikumenu.add_cascade(label="exit",menu=sourya)

root.config(menu=pikumenu)

root.mainloop()

I moved some stuff around but it still works