python贪吃蛇小游戏代码

好的，以下是一个简单的贪吃蛇小游戏的Python代码，使用了Pygame库：

import pygame
import random

# 初始化Pygame
pygame.init()

# 定义常量
SCREEN_WIDTH = 640
SCREEN_HEIGHT = 480
BLOCK_SIZE = 20
SPEED = 5

# 创建游戏窗口
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("贪吃蛇")

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

# 定义贪吃蛇类
class Snake:
    def __init__(self):
        self.body = [(4, 3), (3, 3), (2, 3)]
        self.direction = "right"

    def move(self):
        # 根据方向移动贪吃蛇
        head = self.body[0]
        if self.direction == "right":
            new_head = (head[0] + 1, head[1])
        elif self.direction == "left":
            new_head = (head[0] - 1, head[1])
        elif self.direction == "up":
            new_head = (head[0], head[1] - 1)
        elif self.direction == "down":
            new_head = (head[0], head[1] + 1)

        # 将新的头部加入贪吃蛇身体
        self.body.insert(0, new_head)

    def turn(self, direction):
        # 改变贪吃蛇的方向
        if direction == "right" and self.direction != "left":
            self.direction = "right"
        elif direction == "left" and self.direction != "right":
            self.direction = "left"
        elif direction == "up" and self.direction != "down":
            self.direction = "up"
        elif direction == "down" and self.direction != "up":
            self.direction = "down"

    def draw(self):
        # 绘制贪吃蛇
        for block in self.body:
            rect = pygame.Rect(block[0] * BLOCK_SIZE, block[1] * BLOCK_SIZE, BLOCK_SIZE, BLOCK_SIZE)
            pygame.draw.rect(screen, GREEN, rect)

    def check_collide(self):
        # 检查是否碰到墙壁或自己的身体
        head = self.body[0]
        if head[0] < 0 or head[0] >= SCREEN_WIDTH // BLOCK_SIZE:
            return True
        if head[1] < 0 or head[1] >= SCREEN_HEIGHT // BLOCK_SIZE:
            return True
        for block in self.body[1:]:
            if head == block:
                return True
        return False

    def check_eat(self, food):
        # 检查是否吃到食物
        head = self.body[0]
        if head == food:
            return True
        else:
            return False

# 定义食物类
class Food:
    def __init__(self):
        self.pos = (0, 0)
        self.randomize()

    def randomize(self):
        # 随机生成食物位置
        x = random.randint(0, SCREEN_WIDTH // BLOCK_SIZE - 1)
        y = random.randint(0, SCREEN_HEIGHT // BLOCK_SIZE - 1)
        self.pos = (x, y)

    def draw(self):
        # 绘制食物
        rect = pygame.Rect(self.pos[0] * BLOCK_SIZE, self.pos[1] * BLOCK_SIZE, BLOCK_SIZE, BLOCK_SIZE)
        pygame.draw.rect(screen, RED, rect)

# 初始化游戏对象
snake = Snake()
food = Food()

# 创建游戏时钟
clock = pygame.time.Clock()

# 游戏循环
while True:
    # 处理游戏事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                snake.turn("right")
            elif event.key == pygame.K_LEFT:
                snake.turn("left")
            elif event.key == pygame.K_UP:
                snake.turn("up")
            elif event.key == pygame.K_DOWN:
                snake.turn("down")

    # 移动贪吃蛇
    snake.move()

    # 检查是否吃到食物
    if snake.check_eat(food.pos):
        food.randomize()
    else:
        snake.body.pop()

    # 检查是否碰到墙壁或自己的身体
    if snake.check_collide():
        pygame.quit()
        exit()

    # 绘制游戏场景
    screen.fill(BLACK)
    snake.draw()
    food.draw()
    pygame.display.update()

    # 控制游戏速度
    clock.tick(SPEED)

这个贪吃蛇小游戏使用Pygame库实现。游戏窗口的大小为640x480，每个方块的大小为20x20。贪吃蛇的初始长度为3个方块，每次吃到食物会增加一个方块。贪吃蛇碰到墙壁或自己的身体时游戏结束。在游戏中，可以使用方向键控制贪吃蛇的移动方向。