change the position of already packed widget in tkinter

Here is the code,

from tkinter import *
root = Tk()

update_button = Button(root, text='Update')
update_button.pack()


def button():
    frame1 = Frame(root)
    frame1.pack()

    button1 = Button(frame1, text="Button 1")
    button1.pack(side=LEFT)

    button2 = Button(frame1, text="Button 2")
    button2.pack(side=LEFT)


button()

root.mainloop()

I want button1 to be stacked upon button2 when I click update button. Help please.

I want button1 to be stacked upon button2 when I click update button.

The problem can be fixed.

• Create button_1() function.
• Add button1.pack inside button_1() function.
• Move frame1 and button1 widget outside of function.

That all!

Snippet:

from tkinter import *
root = Tk()

def button_1():     
    button1.pack(side=TOP)

frame1 = Frame(root)    
button1 = Button(frame1, text="Button 1")

update_button = Button(root, text='Update', command=button_1)
update_button.pack()

def button():
    frame1.pack()
    
    button1.pack(side=LEFT)

    button2 = Button(frame1, text="Button 2")
    button2.pack(side=LEFT)


button()

root.mainloop()

Screenshot: