PySimpleGui如何在画布中作图而不在单独窗口中显示

import PySimpleGUI as sg

layout = [[sg.Canvas(size=(400, 400), key='-CANVAS-')]]
window = sg.Window('Canvas Example', layout, finalize=True)

canvas = window['-CANVAS-'].TKCanvas

canvas.create_line(0, 0, 200, 200)

window.read()

import PySimpleGUI as sg

layout = [[sg.Canvas(size=(400, 400), key='-CANVAS-')]]
window = sg.Window('Canvas Example', layout, finalize=True)

canvas = window['-CANVAS-'].TKCanvas
canvas.create_line(0, 0, 200, 200)

window.read()