给我一个python贪吃蛇代码

下面是一个简单的 Python 贪吃蛇代码，你可以尝试运行它：

import pygame
import random

# 初始化 Pygame
pygame.init()

# 定义窗口大小和标题
width, height = 640, 480
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Snake Game")

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

# 定义贪吃蛇的初始位置和大小
snake_block = 10
snake_speed = 15

# 定义字体
font_style = pygame.font.SysFont(None, 30)

# 定义函数，用于显示消息
def message(msg, color):
    message = font_style.render(msg, True, color)
    screen.blit(message, [width / 6, height / 3])

# 定义函数，用于绘制贪吃蛇
def draw_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(screen, black, [x[0], x[1], snake_block, snake_block])

# 游戏循环
def gameLoop():
    game_over = False
    game_close = False

    x1 = width / 2
    y1 = height / 2

    x1_change = 0
    y1_change = 0

    snake_List = []
    Length_of_snake = 1

    foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
    foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0

    # 游戏主循环
    while not game_over:

        while game_close == True:
            screen.fill(white)
            message("You Lost! Press Q-Quit or C-Play Again", red)
            pygame.display.update()

            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_over = True
                        game_close = False
                    if event.key == pygame.K_c:
                        gameLoop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    x1_change = -snake_block
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_block
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_block
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_block
                    x1_change = 0

        # 判断是否撞墙
        if x1 >= width or x1 < 0 or y1 >= height or y1 < 0:
            game_close = True

        # 更新蛇的位置
        x1 += x1_change
        y1 += y1_change

        screen.fill(white)
        pygame.draw.rect(screen, red, [foodx, foody, snake_block, snake_block])

        # 更新蛇的长度
        snake_Head = []
        snake_Head.append(x1)
        snake_Head.append(y1)
        snake_List.append(snake_Head)
        if len(snake_List) > Length_of_snake:
            del snake_List[0]

        # 判断是否撞到自己
        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True

        # 绘制贪吃蛇
        draw_snake(snake_block, snake_List)
        pygame.display.update()

        # 判断是否吃到食物
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
            foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0
            Length_of_snake += 1

        # 更新屏幕
        pygame.display.update()

        # 控制游戏速度
        clock = pygame.time.Clock()
        clock.tick(snake_speed)

    # 退出 Pygame
    pygame.quit()

# 开始游戏
gameLoop()