import tkinter as tk; from tkinter import ttk, scrolledtext; win = tk.Tk(); win.title('hi Python')

mb = tk.Menu(win); win.config(menu=mb);
fm = tk.Menu(mb); fm.add_command(label='New', command=lambda:print('menu command file'))
fm1 = tk.Menu(mb); fm1.add_command(label='help')
mb.add_cascade(label='file', menu=fm); mb.add_cascade(label='help', menu=fm1)
fm2 = tk.Menu(mb); fm2.add_command(label='another');
mb.add_cascade(label='about', menu=fm2)

win.mainloop()