用python写一个贪吃蛇小游戏

好的，下面是用 Python 实现贪吃蛇小游戏的代码示例：

import pygame
import random

pygame.init()

# 游戏窗口大小和标题
window_width = 500
window_height = 500
game_window = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption('贪吃蛇小游戏')

# 游戏颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (213, 50, 80)
green = (0, 255, 0)
blue = (50, 153, 213)

# 定义蛇的大小
snake_size = 10

# 定义游戏时钟
clock = pygame.time.Clock()

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


def message(msg, color):
    """
    在屏幕上显示消息的函数
    """
    mesg = font_style.render(msg, True, color)
    game_window.blit(mesg, [window_width / 6, window_height / 3])


def draw_snake(snake_size, snake_list):
    """
    在游戏窗口上画蛇的函数
    """
    for x in snake_list:
        pygame.draw.rect(game_window, black, [x[0], x[1], snake_size, snake_size])


def game_loop():
    """
    游戏主循环
    """
    game_over = False
    game_close = False

    # 初始化贪吃蛇的位置和长度
    x1 = window_width / 2
    y1 = window_height / 2
    x1_change = 0
    y1_change = 0
    snake_List = []
    Length_of_snake = 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

    while not game_over:

        while game_close == True:
            game_window.fill(white)
            message("你输了！按 Q-退出，C-重新开始", red)
            pygame.display.update()

            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_c:
                        game_loop()

        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

        # 判断蛇是否越界
        if x1 >= window_width or x1 < 0 or y1 >= window_height or y1 < 0:
            game_close = True

        # 移动蛇头的位置
        x1 += x1_change
        y1 += y1_change

        # 在游戏窗口上画蛇和食物
        game_window.fill(white)
        pygame.draw.rect(game_window, green, [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) > Length_of_snake:
            del snake_List[0]

        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True

        draw_snake(snake_size, snake_List)

        pygame.display.update()

        # 当蛇头吃到食物时，贪吃蛇的长度加 1
        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
            Length_of_snake += 1

        clock.tick(10)

    pygame.quit()
    quit()


game_loop()

这个代码实现了一个简单的贪吃蛇小游戏，玩家通过上下左右键控制蛇的移动，蛇头碰到边界或自己的身体时游戏结束，蛇头吃到食物时贪吃蛇的长度加 1。希望你玩得愉快！