写一个python语言，贪吃蛇小游戏

以下是一个简单的 Python 贪吃蛇小游戏：

import pygame
import random

# 初始化 pygame
pygame.init()

# 游戏画面
screen_width = 500
screen_height = 500
game_screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("Greedy Snake Game")

# 颜色定义
black = (0, 0, 0)
white = (255, 255, 255)
green = (0, 255, 0)
red = (255, 0, 0)

# 小方块大小
block_size = 10

# 字体定义
font_style = pygame.font.SysFont("bahnschrift", 25)

# 打印分数函数
def print_score(score):
    score_text = font_style.render("Score: " + str(score), True, white)
    game_screen.blit(score_text, [0, 0])

# 游戏结束函数
def game_over():
    message = font_style.render("Game Over", True, red)
    game_screen.blit(message, [screen_width / 6, screen_height / 3])
    pygame.display.update()
    pygame.time.wait(2000)

# 游戏主循环函数
def game_loop():
    x, y = screen_width / 2, screen_height / 2  # 蛇头坐标
    x_change, y_change = 0, 0  # 蛇头移动方向
    food_x, food_y = round(random.randrange(0, screen_width - block_size) / 10.0) * 10.0, round(random.randrange(0, screen_height - block_size) / 10.0) * 10.0  # 食物坐标
    score = 0  # 得分

    game_exit = False
    while not game_exit:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_exit = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    x_change = -block_size
                    y_change = 0
                elif event.key == pygame.K_RIGHT:
                    x_change = block_size
                    y_change = 0
                elif event.key == pygame.K_UP:
                    y_change = -block_size
                    x_change = 0
                elif event.key == pygame.K_DOWN:
                    y_change = block_size
                    x_change = 0

        x += x_change
        y += y_change

        if x >= screen_width or x < 0 or y >= screen_height or y < 0:  # 到达边缘，游戏结束
            game_over()
            game_exit = True

        pygame.draw.rect(game_screen, green, [food_x, food_y, block_size, block_size])  # 画出食物
        snake_head = [x, y]
        snake_block = [snake_head]
        pygame.draw.rect(game_screen, white, [x, y, block_size, block_size])  # 画出蛇头

        # 吃到食物
        if snake_head == [food_x, food_y]:
            food_x, food_y = round(random.randrange(0, screen_width - block_size) / 10.0) * 10.0, round(random.randrange(0, screen_height - block_size) / 10.0) * 10.0
            score += 10

        pygame.display.update()

        print_score(score)

        pygame.time.wait(100)  # 游戏速度控制

    pygame.quit()
    quit()

game_loop()

希望对您有所帮助！