编一个贪吃蛇游戏

下面是一个简单的贪吃蛇游戏的Python代码示例：

import pygame
import random

# 初始化游戏
pygame.init()

# 游戏窗口尺寸
window_width = 600
window_height = 400

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

# 定义蛇的大小和速度
snake_size = 10
snake_speed = 15

# 初始化游戏窗口
window = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption('贪吃蛇')

clock = pygame.time.Clock()

# 定义字体
font_style = pygame.font.SysFont(None, 30)
score_font = pygame.font.SysFont(None, 50)

# 显示得分
def show_score(score):
    score_text = score_font.render("得分：" + str(score), True, black)
    window.blit(score_text, [10, 10])

# 绘制蛇
def draw_snake(snake_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(window, black, [x[0], x[1], snake_size, snake_size])

# 游戏结束
def game_over():
    message = font_style.render("游戏结束", True, red)
    window.blit(message, [window_width/2 - 100, window_height/2 - 50])

# 主函数
def game():
    game_over = False
    game_close = False

    # 初始位置
    x1 = window_width / 2
    y1 = window_height / 2

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

    # 蛇的身体
    snake_list = []
    snake_length = 1

    # 随机生成食物的位置
    foodx = round(random.randrange(0, window_width - snake_size) / 10.0) * 10.0
    foody = round(random.randrange(0, window_height - snake_size) / 10.0) * 10.0

    # 游戏循环
    while not game_over:
        while game_close:
            window.fill(white)
            game_over()
            show_score(snake_length - 1)
            pygame.display.update()

            # 点击窗口关闭按钮或按下q键退出游戏
            for event in pygame.event.get():
                if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN and event.key == pygame.K_q):
                    game_over = True
                    game_close = False

                # 按下空格键重新开始游戏
                if event.type == pygame.KEYDOWN and event.key == pygame.K_SPACE:
                    game()

        # 移动蛇的位置
        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_size
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_size
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_size
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_size
                    x1_change = 0

        # 检查是否撞到墙壁
        if x1 >= window_width or x1 < 0 or y1 >= window_height or y1 < 0:
            game_close = True

        # 更新蛇的位置
        x1 += x1_change
        y1 += y1_change
        window.fill(white)
        pygame.draw.rect(window, red, [foodx, foody, snake_size, snake_size])
        snake_head = []
        snake_head.append(x1)
        snake_head.append(y1)
        snake_list.append(snake_head)
        if len(snake_list) > snake_length:
            del snake_list[0]

        # 检查是否撞到自己的身体
        for x in snake_list[:-1]:
            if x == snake_head:
                game_close = True

        # 绘制蛇和食物
        draw_snake(snake_size, snake_list)
        show_score(snake_length - 1)

        pygame.display.update()

        # 检查是否吃到食物
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, window_width - snake_size) / 10.0) * 10.0
            foody = round(random.randrange(0, window_height - snake_size) / 10.0) * 10.0
            snake_length += 1

        clock.tick(snake_speed)

    pygame.quit()

# 运行游戏
game()

你可以复制上面的代码并在Python环境中运行，即可开始玩贪吃蛇游戏。使用方向键控制蛇的移动，吃到食物会增加得分并使蛇变长，如果蛇撞到墙壁或自己的身体，则游戏结束