贪吃蛇小游戏代码

下面是一个简单的Python贪吃蛇游戏代码，希望能帮到你：

import pygame
import random

# 初始化
pygame.init()

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

# 设置窗口大小
size = (500, 500)
screen = pygame.display.set_mode(size)

# 设置窗口标题
pygame.display.set_caption("贪吃蛇")

# 坐标值设置
block_size = 10
snake_speed = 15

# 字体设置
font = pygame.font.SysFont(None, 25)

# 输出文字
def message(msg, color):
    text = font.render(msg, True, color)
    screen.blit(text, [size[0]/6, size[1]/3])

# 绘制蛇
def drawSnake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(screen, BLACK, [x[0], x[1], snake_block, snake_block])

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

    # 初始化贪吃蛇位置和长度
    x1 = size[0]/2
    y1 = size[1]/2
    x1_change = 0
    y1_change = 0

    snake_List = []
    Length_of_snake = 1

    # 食物随机生成位置
    foodx = round(random.randrange(0, size[0]-block_size)/10.0)*10.0
    foody = round(random.randrange(0, size[1]-block_size)/10.0)*10.0

    # 游戏循环
    while not game_over:

        # 游戏结束
        while game_close == True:
            screen.fill(WHITE)
            message("你输了！按 Q 退出或 R 重新开始", RED)
            pygame.display.update()

            # 重新开始或退出游戏
            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_r:
                        gameLoop()

        # 控制贪吃蛇移动速度
        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 = -block_size
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = block_size
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -block_size
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = block_size
                    x1_change = 0

        # 判断贪吃蛇是否出界
        if x1 >= size[0] or x1 < 0 or y1 >= size[1] or y1 < 0:
            game_close = True

        # 更新贪吃蛇的坐标
        x1 += x1_change
        y1 += y1_change
        screen.fill(WHITE)

        # 绘制食物
        pygame.draw.rect(screen, GREEN, [foodx, foody, block_size, block_size])

        # 贪吃蛇的身体
        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]

        # 判断贪吃蛇是否吃到食物
        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True

        # 绘制贪吃蛇
        drawSnake(block_size, snake_List)
        pygame.display.update()

        # 判断是否吃到食物
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, size[0]-block_size)/10.0)*10.0
            foody = round(random.randrange(0, size[1]-block_size)/10.0)*10.0
            Length_of_snake += 1

        # 控制贪吃蛇移动速度
        clock = pygame.time.Clock()
        clock.tick(snake_speed)

    # 退出游戏
    pygame.quit()
    quit()

# 开始游戏
gameLoop()

这个代码是基于Python Pygame库编写的，可以在Python环境下直接运行。希望对你有帮助！