给我一个贪吃蛇代码

这里是一个简单的Python贪吃蛇游戏代码，可以供您参考：

import pygame
import random

pygame.init()

# 定义颜色
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)

# 设置屏幕大小
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode([screen_width, screen_height])

# 设置字体
font = pygame.font.SysFont(None, 25)

# 设置贪吃蛇的块大小
block_size = 10

# 定义函数，用于显示文字
def message_to_screen(msg, color):
    screen_text = font.render(msg, True, color)
    screen.blit(screen_text, [screen_width/2, screen_height/2])

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

# 设置游戏循环
def gameLoop():
    gameExit = False
    gameOver = False

    # 初始化贪吃蛇的位置和长度
    lead_x = screen_width / 2
    lead_y = screen_height / 2
    lead_x_change = 0
    lead_y_change = 0
    snake_list = []
    snake_length = 1

    # 初始化食物的位置
    rand_food_x = round(random.randrange(0, screen_width - block_size) / 10.0) * 10.0
    rand_food_y = round(random.randrange(0, screen_height - block_size) / 10.0) * 10.0

    # 设置游戏循环
    while not gameExit:

        # 如果游戏结束，显示游戏结束信息并等待玩家重新开始游戏
        while gameOver == True:
            screen.fill(WHITE)
            message_to_screen("Game over, press C to play again or Q to quit", RED)
            pygame.display.update()

            # 监听事件
            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        gameExit = True
                        gameOver = False
                    if event.key == pygame.K_c:
                        gameLoop()

        # 监听事件
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                gameExit = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    lead_x_change = -block_size
                    lead_y_change = 0
                elif event.key == pygame.K_RIGHT:
                    lead_x_change = block_size
                    lead_y_change = 0
                elif event.key == pygame.K_UP:
                    lead_y_change = -block_size
                    lead_x_change = 0
                elif event.key == pygame.K_DOWN:
                    lead_y_change = block_size
                    lead_x_change = 0

        # 边界判断
        if lead_x >= screen_width or lead_x < 0 or lead_y >= screen_height or lead_y < 0:
            gameOver = True

        # 移动贪吃蛇
        lead_x += lead_x_change
        lead_y += lead_y_change

        # 绘制背景色
        screen.fill(WHITE)

        # 绘制食物
        pygame.draw.rect(screen, RED, [rand_food_x, rand_food_y, block_size, block_size])

        # 更新贪吃蛇列表
        snake_head = []
        snake_head.append(lead_x)
        snake_head.append(lead_y)
        snake_list.append(snake_head)

        if len(snake_list) > snake_length:
            del snake_list[0]

        # 判断贪吃蛇是否吃到食物
        for eachSegment in snake_list[:-1]:
            if eachSegment == snake_head:
                gameOver = True

        # 绘制贪吃蛇
        draw_snake(snake_list, block_size)

        # 更新分数
        text = font.render("Score: " + str(snake_length - 1), True, BLACK)
        screen.blit(text, [0, 0])

        # 更新屏幕
        pygame.display.update()

        # 判断是否吃到食物
        if lead_x == rand_food_x and lead_y == rand_food_y:
            rand_food_x = round(random.randrange(0, screen_width - block_size) / 10.0) * 10.0
            rand_food_y = round(random.randrange(0, screen_height - block_size) / 10.0) * 10.0
            snake_length += 1

        # 设置游戏帧率
        clock = pygame.time.Clock()
        clock.tick(15)

    # 退出游戏
    pygame.quit()
    quit()

# 开始游戏
gameLoop()

希望对您有帮助！