我想在这个基本的python GUI表单中检索和显示值。如何检索单选按钮和复选框值并显示它？以下是代码

import tkinter as tk

def show_values():
    print("单选按钮的值：", var.get())
    print("复选框的值：", ", ".join([check_var.get() for check_var in check_vars]))

root = tk.Tk()

# 创建单选按钮
var = tk.StringVar()
radio_button1 = tk.Radiobutton(root, text="选项1", variable=var, value="选项1")
radio_button2 = tk.Radiobutton(root, text="选项2", variable=var, value="选项2")
radio_button3 = tk.Radiobutton(root, text="选项3", variable=var, value="选项3")

# 创建复选框
check_vars = []
check_button1 = tk.Checkbutton(root, text="复选框1", variable=tk.BooleanVar())
check_vars.append(check_button1.var)
check_button2 = tk.Checkbutton(root, text="复选框2", variable=tk.BooleanVar())
check_vars.append(check_button2.var)
check_button3 = tk.Checkbutton(root, text="复选框3", variable=tk.BooleanVar())
check_vars.append(check_button3.var)

# 创建按钮用于显示值
show_button = tk.Button(root, text="显示值", command=show_values)

# 布局
radio_button1.pack()
radio_button2.pack()
radio_button3.pack()
check_button1.pack()
check_button2.pack()
check_button3.pack()
show_button.pack()

root.mainloop()