python链表实现贪吃蛇

以下是Python链表实现贪吃蛇的示例代码：

import pygame
import random

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

# 初始化pygame
pygame.init()

# 设置游戏窗口大小
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))

# 设置游戏标题
pygame.display.set_caption('Snake Game')

# 设置游戏时钟
clock = pygame.time.Clock()

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

# 定义蛇的初始位置和大小
block_size = 10
snake_speed = 15

# 定义函数，用于显示消息
def message_to_screen(msg, color):
    screen_text = font.render(msg, True, color)
    screen.blit(screen_text, [screen_width/2, screen_height/2])

# 定义函数，用于绘制蛇
def draw_snake(block_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(screen, green, [x[0], x[1], block_size, block_size])

# 定义函数，用于显示得分
def show_score(score):
    score_text = font.render("Score: " + str(score), True, black)
    screen.blit(score_text, [0, 0])

# 定义函数，用于显示游戏结束消息
def game_over():
    message_to_screen("Game over, press C to play again or Q to quit", red)
    pygame.display.update()

# 定义函数，用于实现贪吃蛇游戏
def gameLoop():
    game_exit = False
    game_over_flag = False

    # 初始化蛇的位置和长度
    lead_x = screen_width / 2
    lead_y = screen_height / 2
    lead_x_change = 0
    lead_y_change = 0
    snake_list = []
    snake_length = 1

    # 初始化食物的位置
    food_x = round(random.randrange(0, screen_width - block_size) / 10.0) * 10.0
    food_y = round(random.randrange(0, screen_height - block_size) / 10.0) * 10.0

    while not game_exit:

        while game_over_flag == True:
            game_over()
            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_exit = True
                        game_over_flag = False
                    if event.key == pygame.K_c:
                        gameLoop()

        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

        # 判断蛇是否超出边界
        if lead_x >= screen_width or lead_x < 0 or lead_y >= screen_height or lead_y < 0:
            game_over_flag = True

        # 更新蛇的位置
        lead_x += lead_x_change
        lead_y += lead_y_change

        # 绘制游戏背景
        screen.fill(white)

        # 绘制食物
        pygame.draw.rect(screen, blue, [food_x, food_y, block_size, block_size])

        # 将蛇的位置添加到列表中
        snake_head = []
        snake_head.append(lead_x)
        snake_head.append(lead_y)
        snake_list.append(snake_head)

        # 如果蛇的长度超过了snake_length，就删除列表中的第一个元素
        if len(snake_list) > snake_length:
            del snake_list[0]

        # 判断蛇是否碰到了自己
        for segment in snake_list[:-1]:
            if segment == snake_head:
                game_over_flag = True

        # 绘制蛇
        draw_snake(block_size, snake_list)

        # 显示得分
        show_score(snake_length - 1)

        # 更新食物的位置
        if lead_x == food_x and lead_y == food_y:
            food_x = round(random.randrange(0, screen_width - block_size) / 10.0) * 10.0
            food_y = round(random.randrange(0, screen_height - block_size) / 10.0) * 10.0
            snake_length += 1

        # 更新屏幕
        pygame.display.update()

        # 设置游戏时钟
        clock.tick(snake_speed)

    # 退出pygame
    pygame.quit()

# 开始游戏
gameLoop()