如何将从颤动多选小部件中选择的值保存到列表中

import tkinter as tk
from tkinter import ttk

def save_selected_values():
    selected_values = []
    for index in checkbox_list:
        if checkbox_list[index].get() == 1:
            selected_values.append(checkbox_list[index].cget("text"))
    print(selected_values)

root = tk.Tk()

checkbox_list = {}

# 创建颤动多选小部件
checkbox1 = ttk.Checkbutton(root, text="选项1")
checkbox1.grid(row=0, sticky="w")
checkbox_list[0] = checkbox1

checkbox2 = ttk.Checkbutton(root, text="选项2")
checkbox2.grid(row=1, sticky="w")
checkbox_list[1] = checkbox2

checkbox3 = ttk.Checkbutton(root, text="选项3")
checkbox3.grid(row=2, sticky="w")
checkbox_list[2] = checkbox3

# 创建保存按钮
save_button = ttk.Button(root, text="保存", command=save_selected_values)
save_button.grid(row=3)

root.mainloop()