在tkinter中迭代复选框

import tkinter as tk

root = tk.Tk()

checkbox1 = tk.Checkbutton(root, text="选项1")
checkbox2 = tk.Checkbutton(root, text="选项2")
checkbox3 = tk.Checkbutton(root, text="选项3")

checkbox1.pack()
checkbox2.pack()
checkbox3.pack()

checkbox1.grid(row=0, column=0)
checkbox2.grid(row=1, column=0)
checkbox3.grid(row=2, column=0)

checkbox1_state = checkbox1.get()
checkbox2_state = checkbox2.get()
checkbox3_state = checkbox3.get()

def checkbox_changed():
    checkbox1_state = checkbox1.get()
    checkbox2_state = checkbox2.get()
    checkbox3_state = checkbox3.get()
    # 执行相应的操作

checkbox1 = tk.Checkbutton(root, text="选项1", command=checkbox_changed)
checkbox2 = tk.Checkbutton(root, text="选项2", command=checkbox_changed)
checkbox3 = tk.Checkbutton(root, text="选项3", command=checkbox_changed)