tk9_menubar.py

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import tkinter as tk

window = tk.Tk()
window.title('my window')
window.geometry('200x200')

l = tk.Label(window, text='', bg='yellow')
l.pack()
counter = 0
def do_job():
    global counter
    l.config(text='do '+ str(counter))
    counter+=1

menubar = tk.Menu(window)
filemenu = tk.Menu(menubar, tearoff=0)
menubar.add_cascade(label='File', menu=filemenu)
filemenu.add_command(label='New', command=do_job)
filemenu.add_command(label='Open', command=do_job)
filemenu.add_command(label='Save', command=do_job)
filemenu.add_separator()
filemenu.add_command(label='Exit', command=window.quit)

editmenu = tk.Menu(menubar, tearoff=0)
menubar.add_cascade(label='Edit', menu=editmenu)
editmenu.add_command(label='Cut', command=do_job)
editmenu.add_command(label='Copy', command=do_job)
editmenu.add_command(label='Paste', command=do_job)

submenu = tk.Menu(filemenu)
filemenu.add_cascade(label='Import', menu=submenu, underline=0)
submenu.add_command(label="Submenu1", command=do_job)

window.config(menu=menubar)

window.mainloop()