如何在tkinter中删除弹出窗口？

import tkinter as tk

def create_window():
    window = tk.Toplevel(root)
    window.title("弹出窗口")
    
    label = tk.Label(window, text="这是一个弹出窗口")
    label.pack()
    
    close_btn = tk.Button(window, text="关闭", command=window.destroy)
    close_btn.pack()

root = tk.Tk()
root.title("主窗口")

open_btn = tk.Button(root, text="打开弹出窗口", command=create_window)
open_btn.pack()

root.mainloop()