如何使用Tkinter创建选定的复选框列表项

import tkinter as tk

root = tk.Tk()

selected_items = []

checkboxes = []
items = ["Item 1", "Item 2", "Item 3"]  # 选项列表

for item in items:
    var = tk.IntVar()
    checkbox = tk.Checkbutton(root, text=item, variable=var)
    checkbox.pack()
    checkboxes.append((item, var))

def on_checkbox_change():
    selected_items.clear()
    for item, var in checkboxes:
        if var.get() == 1:
            selected_items.append(item)

for item, var in checkboxes:
    var.trace("w", lambda *args: on_checkbox_change())

root.mainloop()