TKINTER：关闭所有打开的子 Windows 但离开父 Window 打开

Question

First, hello and thanks for assisting me with my Python/tkinter question!

I would like to be able to close all open child windows and leave the root window open when closing them.

My sample code is below. After one opens windows 1 & 2, I would like the third button to close windows 1 & 2 only.

I appreciate any insights!

---

import tkinter as tk
    
root = tk.Tk()

def open():
    top = tk.Toplevel(root)
    top.title('WINDOW 1')
    top.geometry("300x200+550+150")
    top.mainloop()

def open2():
    top2 = tk.Toplevel(root)
    top2.title('WINDOW 2')
    top2.geometry("300x200+550+400")
    top2.mainloop()

#def close():
    #

root.geometry('300x200')

btn_1 = tk.Button(root, text = "Open Window 1", background="#949BA4", command = open)
btn_1.place(x=21, y=20)

btn_2 = tk.Button(root, text = "Open Window 2", background="#949BA4", command = open2)
btn_2.place(x=184, y=20)

btn_3 = tk.Button(root, text = "Close Win 1 & 2", background="#9ABDE9", )
btn_3.place(x=75, y=100)

root.mainloop()

Answer 1

I found my answer:

import tkinter as tk

root = tk.Tk()

def open():
    top = tk.Toplevel(root)
    top.title('WINDOW 1')
    top.geometry("300x200+550+150")
    top.mainloop()

def open2():
    top2 = tk.Toplevel(root)
    top2.title('WINDOW 2')
    top2.geometry("300x200+550+400")
    top2.mainloop()

def close():
    for widget in root.winfo_children():
        if isinstance(widget, tk.Toplevel):
            widget.destroy()

root.geometry('300x200')

btn_1 = tk.Button(root, text = "Open Window 1", background="#949BA4", command = open)
btn_1.place(x=21, y=20)

btn_2 = tk.Button(root, text = "Open Window 2", background="#949BA4", command = open2)
btn_2.place(x=184, y=20)

btn_3 = tk.Button(root, text = "Close Win 1 & 2", background="#9ABDE9", command = close)
btn_3.place(x=75, y=100)

root.mainloop()