如何在 pysimplegui 中更新文本

Question

I'm very new to python so I'm just experimenting with new GUIs and other things. I was wondering if you could open up a window using pysimplegui and have a piece of text which says "0", and when you click a button the text changes to the previous number +1. For EG: at first the text says "0", but when you click a button of some sort, the text changes to a "1". Sorry if my explanation of my problem is bad but I have not used stack overflow before.

import PySimpleGUI as sg
num = 0

layout = [
    [sg.Text(num)],
    [sg.Button("hi")]
]

window = sg.Window("the box", layout)

while True:
    event, values = window.read()
    if event == "hi":
        num = num+1
        layout = [
    [sg.Text(num)],
    [sg.Button("hi")]
    ]
    window = sg.Window("the box", layout)

I tried this code but it did not work. As you can probably see I am very new to all of this so kindly do not type an answer with complicated/advanced code.

Thanks to tim who gave me an answer but i do not understand it, here is the new(still faulty) code:

    import PySimpleGUI as sg
num = 0

layout = [
    [sg.Text(key='xxx')],
    [sg.Button("hi")]
]

window = sg.Window("the box", layout)

while True:
    event, values['xxx'] = window.read()
    if event == "hi":
        xxx = num
        num = num + 1

Answer 1

Should call method window[element_key].update(value=new_value) to update the element window[element_key] with new value new_value .

New layout and new window are not required.

import PySimpleGUI as sg

num = 0

layout = [
    [sg.Text(num, key='xxx')],
    [sg.Button("hi")],
]

window = sg.Window("the box", layout)

while True:

    event, values = window.read()

    if event == sg.WIN_CLOSED:
        break
    elif event == "hi":
        num += 1
        window['xxx'].update(num)

window.close()