请写出一个贪吃蛇小游戏的代码

以下是一个简单的Python贪吃蛇小游戏代码： ```python import pygame import random # 初始化pygame pygame.init() # 设置游戏窗口大小 window_width = 500 window_height = 500 window = pygame.display.set_mode((window_width, window_height)) # 设置游戏标题 pygame.display.set_caption("贪吃蛇") # 定义颜色 white = (255, 255, 255) black = (0, 0, 0) red = (255, 0, 0) # 定义蛇的初始位置和大小 snake_block_size = 10 snake_speed = 15 x1 = window_width / 2 y1 = window_height / 2 x1_change = 0 y1_change = 0 snake_List = [] Length_of_snake = 1 # 定义食物的初始位置 foodx = round(random.randrange(0, window_width - snake_block_size) / 10.0) * 10.0 foody = round(random.randrange(0, window_height - snake_block_size) / 10.0) * 10.0 # 定义字体 font_style = pygame.font.SysFont(None, 30) # 定义显示分数的函数 def Your_score(score): value = font_style.render("Your Score: " + str(score), True, white) window.blit(value, [0, 0]) # 定义游戏结束的函数 def message(msg, color): mesg = font_style.render(msg, True, color) window.blit(mesg, [window_width / 6, window_height / 3]) # 游戏循环 game_over = False while not game_over: 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_size y1_change = 0 elif event.key == pygame.K_RIGHT: x1_change = snake_block_size y1_change = 0 elif event.key == pygame.K_UP: y1_change = -snake_block_size x1_change = 0 elif event.key == pygame.K_DOWN: y1_change = snake_block_size x1_change = 0 # 判断蛇是否撞墙 if x1 >= window_width or x1 < 0 or y1 >= window_height or y1 < 0: game_over = True # 更新蛇的位置 x1 += x1_change y1 += y1_change # 绘制食物 window.fill(black) pygame.draw.rect(window, red, [foodx, foody, snake_block_size, snake_block_size]) # 绘制蛇 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] for x in snake_List[:-1]: if x == snake_Head: game_over = True for x in snake_List: pygame.draw.rect(window, white, [x[0], x[1], snake_block_size, snake_block_size]) # 更新分数 Your_score(Length_of_snake - 1) # 判断蛇是否吃到食物 if x1 == foodx and y1 == foody: foodx = round(random.randrange(0, window_width - snake_block_size) / 10.0) * 10.0 foody = round(random.randrange(0, window_height - snake_block_size) / 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) # 显示游戏结束信息 message("You lost", white) pygame.display.update() # 等待3秒后退出游戏 pygame.time.wait(3000) # 退出pygame pygame.quit() # 退出程序 quit() ``` 这个代码使用pygame库实现了一个简单的贪吃蛇小游戏。玩家通过控制蛇的方向，让蛇吃到食物，蛇的身体会变长，直到撞墙或者撞到自己的身体，游戏结束。在游戏结束后，会显示玩家的得分，并等待3秒后退出游戏。