如何在Tkinter中将弹出菜单绑定到标签

import tkinter as tk
from tkinter import Menu

window = tk.Tk()
label = tk.Label(window, text="右键点击我")
label.pack()

popup_menu = Menu(window, tearoff=0)
popup_menu.add_command(label="菜单项1")
popup_menu.add_command(label="菜单项2")
popup_menu.add_separator()
popup_menu.add_command(label="菜单项3")

def show_popup_menu(event):
    popup_menu.post(event.x_root, event.y_root)

label.bind("<Button-3>", show_popup_menu)

window.mainloop()