如何使用python pyglet将tic-tac-toe网格放在窗口的中心

import pyglet
from pyglet.window import key, mouse

window = pyglet.window.Window(width=400, height=400, caption='Tic Tac Toe')

def draw_grid():
    for i in range(4):
        pyglet.graphics.draw(2, pyglet.gl.GL_LINES,
            ('v2i', (i * 100, 0, i * 100, 300)))
        pyglet.graphics.draw(2, pyglet.gl.GL_LINES,
            ('v2i', (0, i * 100, 300, i * 100)))

@window.event
def on_draw():
    window.clear()
    draw_grid()

pyglet.app.run()

import pyglet
from pyglet.window import key, mouse

window = pyglet.window.Window(width=400, height=400, caption='Tic Tac Toe')

def draw_grid():
    for i in range(4):
        pyglet.graphics.draw(2, pyglet.gl.GL_LINES,
            ('v2i', (i * 100, 0, i * 100, 300)))
        pyglet.graphics.draw(2, pyglet.gl.GL_LINES,
            ('v2i', (0, i * 100, 300, i * 100)))

@window.event
def on_draw():
    window.clear()
    draw_grid()

pyglet.app.run()