用Python编写简单的贪吃蛇小游戏

好的，以下是一个简单的贪吃蛇小游戏的代码，你可以在Python环境下运行它：

import pygame
import random

# 初始化Pygame
pygame.init()

# 定义游戏窗口的大小
window_width = 500
window_height = 500

# 定义游戏窗口
game_display = pygame.display.set_mode((window_width, window_height))

# 定义游戏标题
pygame.display.set_caption('贪吃蛇小游戏')

# 定义颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)

# 定义贪吃蛇的大小
block_size = 10

# 定义时钟
clock = pygame.time.Clock()

# 定义字体
font = pygame.font.SysFont(None, 25)

# 定义函数，用于显示消息
def message_to_screen(msg, color):
    screen_text = font.render(msg, True, color)
    game_display.blit(screen_text, [window_width/6, window_height/3])

# 定义函数，用于显示贪吃蛇
def snake(block_size, snake_list):
    for block in snake_list:
        pygame.draw.rect(game_display, black, [block[0], block[1], block_size, block_size])

# 定义函数，用于显示得分
def score(score):
    text = font.render('得分：' + str(score), True, black)
    game_display.blit(text, [0, 0])

# 定义游戏循环
def game_loop():
    game_exit = False
    game_over = False

    # 定义贪吃蛇的初始位置和长度
    lead_x = window_width / 2
    lead_y = window_height / 2
    lead_x_change = 0
    lead_y_change = 0
    snake_list = []
    snake_length = 1

    # 定义食物的初始位置
    rand_food_x = round(random.randrange(0, window_width - block_size) / 10.0) * 10.0
    rand_food_y = round(random.randrange(0, window_height - block_size) / 10.0) * 10.0

    while not game_exit:

        while game_over:
            game_display.fill(white)
            message_to_screen('游戏结束，按 Q 退出，按 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_exit = True
                        game_over = False
                    elif event.key == pygame.K_c:
                        game_loop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_exit = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    lead_x_change = -block_size
                    lead_y_change = 0
                elif event.key == pygame.K_RIGHT:
                    lead_x_change = block_size
                    lead_y_change = 0
                elif event.key == pygame.K_UP:
                    lead_y_change = -block_size
                    lead_x_change = 0
                elif event.key == pygame.K_DOWN:
                    lead_y_change = block_size
                    lead_x_change = 0

        # 判断贪吃蛇是否撞墙
        if lead_x >= window_width or lead_x < 0 or lead_y >= window_height or lead_y < 0:
            game_over = True

        # 移动贪吃蛇
        lead_x += lead_x_change
        lead_y += lead_y_change

        # 判断贪吃蛇是否吃到食物
        if lead_x == rand_food_x and lead_y == rand_food_y:
            rand_food_x = round(random.randrange(0, window_width - block_size) / 10.0) * 10.0
            rand_food_y = round(random.randrange(0, window_height - block_size) / 10.0) * 10.0
            snake_length += 1

        game_display.fill(white)

        pygame.draw.rect(game_display, red, [rand_food_x, rand_food_y, block_size, block_size])

        # 定义贪吃蛇的头部
        snake_head = []
        snake_head.append(lead_x)
        snake_head.append(lead_y)
        snake_list.append(snake_head)

        if len(snake_list) > snake_length:
            del snake_list[0]

        # 判断贪吃蛇是否撞到自己
        for block in snake_list[:-1]:
            if block == snake_head:
                game_over = True

        # 显示贪吃蛇和得分
        snake(block_size, snake_list)
        score(snake_length - 1)
        pygame.display.update()

        # 设置游戏每秒的帧数
        clock.tick(10)

    pygame.quit()
    quit()

game_loop()

提示：在运行代码前，需要确保已经安装了 Pygame 模块，可以使用 `pip install pygame` 命令进行安装。