写一个python贪吃蛇代码

以下是一个简单的Python贪吃蛇游戏代码：

import pygame
import random

# 定义颜色变量
white = (255, 255, 255)
black = (0, 0, 0)
red = (213, 50, 80)
green = (0, 255, 0)
blue = (50, 153, 213)

# 设置游戏屏幕尺寸
dis_width = 600
dis_height = 400

# 初始化pygame
pygame.init()

# 创建游戏屏幕
dis = pygame.display.set_mode((dis_width, dis_height))
pygame.display.set_caption('Snake Game')

# 设置时钟
clock = pygame.time.Clock()

# 设置方块尺寸和速度
snake_block = 10
snake_speed = 15

# 设置字体
font_style = pygame.font.SysFont(None, 30)


# 绘制分数
def our_score(score):
    value = font_style.render("Score: " + str(score), True, white)
    dis.blit(value, [0, 0])


# 绘制蛇
def our_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(dis, green, [x[0], x[1], snake_block, snake_block])


# 提示信息
def message(msg, color):
    mesg = font_style.render(msg, True, color)
    dis.blit(mesg, [dis_width / 6, dis_height / 3])


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

    # 初始位置
    x1 = dis_width / 2
    y1 = dis_height / 2

    # 初始移动方向
    x1_change = 0
    y1_change = 0

    # 蛇的初始长度
    snake_List = []
    Length_of_snake = 1

    # 随机生成食物位置
    foodx = round(random.randrange(0, dis_width - snake_block) / 10.0) * 10.0
    foody = round(random.randrange(0, dis_height - snake_block) / 10.0) * 10.0

    # 游戏开始循环
    while not game_over:

        # 游戏结束提示
        while game_close == True:
            dis.fill(black)
            message("You Lost! Press Q-Quit or C-Play Again", red)
            our_score(Length_of_snake - 1)
            pygame.display.update()

            # 判断玩家操作
            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:
                        game_loop()

        # 判断玩家操作
        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

        # 判断蛇越界
        if x1 >= dis_width or x1 < 0 or y1 >= dis_height or y1 < 0:
            game_close = True

        # 更新蛇位置
        x1 += x1_change
        y1 += y1_change

        # 绘制背景色
        dis.fill(black)

        # 绘制食物
        pygame.draw.rect(dis, blue, [foodx, foody, snake_block, snake_block])

        # 更新蛇列表
        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]

        # 判断蛇与食物碰撞
        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True

        # 绘制蛇
        our_snake(snake_block, snake_List)

        # 绘制分数
        our_score(Length_of_snake - 1)

        # 更新游戏屏幕
        pygame.display.update()

        # 判断蛇与食物重合
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, dis_width - snake_block) / 10.0) * 10.0
            foody = round(random.randrange(0, dis_height - snake_block) / 10.0) * 10.0
            Length_of_snake += 1

        # 控制游戏速度
        clock.tick(snake_speed)

    # 关闭pygame
    pygame.quit()

    # 退出程序
    quit()


# 开始游戏
game_loop()

运行代码即可开始游戏，使用方向键控制蛇的移动，吃到食物后蛇的长度会增加。游戏结束后可以选择退出或重新开始。