我有一张600x1000的图片，我想用pygame将图片的底部部分放到600x600的窗口上

import pygame

# 初始化Pygame
pygame.init()

# 创建窗口
window_width = 600
window_height = 600
window = pygame.display.set_mode((window_width, window_height))

# 加载图片
image_path = "your_image_path.jpg"  # 替换为你的图片路径
image = pygame.image.load(image_path)

# 调整图片大小
image_width = 600
image_height = 1000
image = pygame.transform.scale(image, (image_width, image_height))

# 截取图片底部部分
cropped_image = image.subsurface(pygame.Rect(0, image_height - window_height, window_width, window_height))

# 在窗口上绘制图片
window.blit(cropped_image, (0, 0))

# 刷新窗口
pygame.display.flip()

# 游戏循环
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

# 退出Pygame
pygame.quit()