from tkinter import *

t=Tk()

t.title("复选框")

t.geometry("300x300")

m=Menu(t)

m1=Menu(m)

m.add_cascade(label="File",menu=m1)

for i in ["New File","Open","Exit"]:

m1.add_command(label=i)

m2=Menu(m)

m.add_cascade(label="Edit",menu=m2)

for i in ["Undo","Redo","Cut"]:

m2.add_command(label=i)

m3=Menu(m)

m.add_cascade(label="Run",menu=m3)

for i in ["New File","Open","Exit"]:

m2.add_command(label=i)

t.config(menu=m1)

t.mainloop()