更改Tkinter列表框选择时获取回调？

import tkinter as tk

def on_listbox_select(event):
    selected_index = listbox.curselection()
    selected_item = listbox.get(selected_index)
    print(f"Selected item: {selected_item}")

root = tk.Tk()

listbox = tk.Listbox(root, listvariable=tk.StringVar())
listbox.pack()

listbox.insert(tk.END, "Item 1")
listbox.insert(tk.END, "Item 2")
listbox.insert(tk.END, "Item 3")

listbox.bind("<<ListboxSelect>>", on_listbox_select)

root.mainloop()