如何使用tkinter在第二个窗口中创建“返回按钮”？

import tkinter as tk

def create_second_window():
    second_window = tk.Toplevel()
    # 设置第二个窗口的属性和布局

    return_button = tk.Button(second_window, text="返回")
    return_button.pack()

def create_second_window():
    second_window = tk.Toplevel()
    # 设置第二个窗口的属性和布局

    def return_to_main_window():
        second_window.destroy()  # 销毁第二个窗口

    return_button = tk.Button(second_window, text="返回", command=return_to_main_window)
    return_button.pack()