Fala ai pessoal!
Segue abaixo um menu básico com Tkinter:
from Tkinter import *
def func_button():
filewin = Toplevel(root)
button = Button(filewin, text="Button")
button.pack()
root = Tk()
menubar = Menu(root)
filemenu = Menu(menubar, tearoff=0)
filemenu.add_command(label="novo", command=func_button)
filemenu.add_command(label="abrir", command=func_button)
filemenu.add_command(label="salvar", command=func_button)
filemenu.add_command(label="salvar como...", command=func_button)
filemenu.add_command(label="fechar", command=func_button)
root.config(menu=menubar)
root.mainloop()
