帮我写一个贪吃蛇游戏代码

好的，以下是一个简单的贪吃蛇游戏代码，使用 Python 编写： ```python import pygame import random # 初始化 Pygame pygame.init() # 定义游戏区域大小和格子大小 SCREEN_WIDTH = 640 SCREEN_HEIGHT = 480 GRID_SIZE = 20 # 定义颜色 BLACK = (0, 0, 0) WHITE = (255, 255, 255) GREEN = (0, 255, 0) RED = (255, 0, 0) # 创建游戏窗口 screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT)) # 设置游戏标题 pygame.display.set_caption("贪吃蛇") # 定义蛇类 class Snake: def __init__(self): self.body = [(4, 3), (3, 3), (2, 3)] self.direction = "right" # 移动蛇 def move(self): head = self.body[0] if self.direction == "up": new_head = (head[0], head[1] - 1) elif self.direction == "down": new_head = (head[0], head[1] + 1) elif self.direction == "left": new_head = (head[0] - 1, head[1]) elif self.direction == "right": new_head = (head[0] + 1, head[1]) self.body.insert(0, new_head) self.body.pop() # 改变蛇的方向 def change_direction(self, direction): if direction == "up" and self.direction != "down": self.direction = "up" elif direction == "down" and self.direction != "up": self.direction = "down" elif direction == "left" and self.direction != "right": self.direction = "left" elif direction == "right" and self.direction != "left": self.direction = "right" # 判断蛇是否撞墙或撞到自己 def is_dead(self): head = self.body[0] if head[0] < 0 or head[0] >= SCREEN_WIDTH / GRID_SIZE: return True elif head[1] < 0 or head[1] >= SCREEN_HEIGHT / GRID_SIZE: return True for i in range(1, len(self.body)): if head == self.body[i]: return True return False # 判断蛇是否吃到食物 def eat_food(self, food_position): if self.body[0] == food_position: self.body.insert(0, food_position) return True return False # 定义食物类 class Food: def __init__(self): self.position = (0, 0) self.randomize_position() # 随机生成食物位置 def randomize_position(self): x = random.randint(0, SCREEN_WIDTH / GRID_SIZE - 1) y = random.randint(0, SCREEN_HEIGHT / GRID_SIZE - 1) self.position = (x, y) # 绘制食物 def draw(self): x = self.position[0] * GRID_SIZE y = self.position[1] * GRID_SIZE pygame.draw.rect(screen, RED, (x, y, GRID_SIZE, GRID_SIZE)) # 创建蛇和食物对象 snake = Snake() food = Food() # 游戏循环 running = True clock = pygame.time.Clock() while running: # 处理事件 for event in pygame.event.get(): if event.type == pygame.QUIT: running = False elif event.type == pygame.KEYDOWN: if event.key == pygame.K_UP: snake.change_direction("up") elif event.key == pygame.K_DOWN: snake.change_direction("down") elif event.key == pygame.K_LEFT: snake.change_direction("left") elif event.key == pygame.K_RIGHT: snake.change_direction("right") # 移动蛇 snake.move() # 判断蛇是否死亡 if snake.is_dead(): running = False # 判断蛇是否吃到食物 if snake.eat_food(food.position): food.randomize_position() # 绘制游戏界面 screen.fill(BLACK) snake_color = WHITE for body_part in snake.body: x = body_part[0] * GRID_SIZE y = body_part[1] * GRID_SIZE pygame.draw.rect(screen, snake_color, (x, y, GRID_SIZE, GRID_SIZE)) snake_color = GREEN if snake_color == WHITE else WHITE food.draw() pygame.display.flip() # 控制游戏速度 clock.tick(10) # 退出 Pygame pygame.quit() ``` 这个代码实现了一个基本的贪吃蛇游戏，使用 Pygame 库进行图形界面的绘制和事件处理。你可以根据需要进行修改和优化。