如何在Python上为游戏构建一个20x20的棋盘？

import pygame

# 定义棋盘大小
board_size = 20
cell_size = 30

# 初始化Pygame
pygame.init()

# 创建窗口
window_size = (board_size * cell_size, board_size * cell_size)
window = pygame.display.set_mode(window_size)

# 游戏主循环
running = True
while running:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 绘制棋盘
    for row in range(board_size):
        for col in range(board_size):
            # 计算每个格子的位置
            x = col * cell_size
            y = row * cell_size

            # 绘制格子
            pygame.draw.rect(window, (255, 255, 255), (x, y, cell_size, cell_size))

    # 更新窗口
    pygame.display.flip()

# 退出游戏
pygame.quit()