在python中添加简单菜单

import tkinter as tk

def on_file_new():
    print("New file selected")

def on_file_open():
    print("Open file selected")

def on_file_save():
    print("Save file selected")

def on_file_exit():
    root.quit()

root = tk.Tk()

# 创建菜单栏
menu_bar = tk.Menu(root)
root.config(menu=menu_bar)

# 创建文件菜单
file_menu = tk.Menu(menu_bar, tearoff=False)
menu_bar.add_cascade(label="File", menu=file_menu)

# 添加文件菜单项
file_menu.add_command(label="New", command=on_file_new)
file_menu.add_command(label="Open", command=on_file_open)
file_menu.add_command(label="Save", command=on_file_save)
file_menu.add_separator()
file_menu.add_command(label="Exit", command=on_file_exit)

root.mainloop()