贪吃蛇小游戏python代码

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

import pygame
import random

# 初始化
pygame.init()

# 设置游戏窗口大小
window_width = 800
window_height = 600
game_display = pygame.display.set_mode((window_width, window_height))

# 设置游戏标题
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)

# 设置蛇的方块大小
block_size = 20

# 加载字体
font = pygame.font.SysFont(None, 25)

# 定义函数，显示消息
def message_to_screen(msg, color):
    screen_text = font.render(msg, True, color)
    game_display.blit(screen_text, [window_width/2, window_height/2])

# 定义函数，画出蛇
def draw_snake(block_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(game_display, black, [x[0], x[1], block_size, block_size])

# 设置帧率
clock = pygame.time.Clock()

# 定义主函数，游戏循环
def game_loop():
    game_exit = False
    game_over = False

    # 蛇的初始位置
    lead_x = window_width/2
    lead_y = window_height/2

    # 蛇的初始速度
    lead_x_change = 0
    lead_y_change = 0

    # 定义蛇的长度
    snake_list = []
    snake_length = 1

    # 随机生成食物的位置
    food_x = round(random.randrange(0, window_width - block_size) / 10.0) * 10.0
    food_y = round(random.randrange(0, window_height - block_size) / 10.0) * 10.0

    while not game_exit:
        while game_over == True:
            game_display.fill(white)
            message_to_screen("Game over, press Q to quit or C to continue", red)
            pygame.display.update()

            # 判断游戏是否结束
            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_exit = True
                        game_over = False
                    if event.key == pygame.K_c:
                        game_loop()

        # 监听事件
        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 >= window_width or lead_x < 0 or lead_y >= window_height or lead_y < 0:
            game_over = True

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

        # 清空屏幕
        game_display.fill(white)

        # 画出食物
        pygame.draw.rect(game_display, red, [food_x, food_y, block_size, block_size])

        # 定义蛇的位置
        snake_head = []
        snake_head.append(lead_x)
        snake_head.append(lead_y)
        snake_list.append(snake_head)

        # 判断蛇是否吃到食物
        if len(snake_list) > snake_length:
            del snake_list[0]

        for each_segment in snake_list[:-1]:
            if each_segment == snake_head:
                game_over = True

        # 画出蛇
        draw_snake(block_size, snake_list)

        # 更新屏幕
        pygame.display.update()

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

        # 设置帧率
        clock.tick(15)

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

# 开始游戏
game_loop()

运行代码后，你就可以开始玩这个贪吃蛇小游戏了。