用python写一个贪吃蛇

代码示例：

import pygame
import random

# 初始化pygame模块
pygame.init()

# 游戏窗口的大小
window_width = 400
window_height = 400

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

# 设置游戏窗口
game_display = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption('贪吃蛇')

# 定义蛇的尺寸
block_size = 10

# 导入字体
font_style = pygame.font.SysFont(None, 30)

# 显示得分
def our_score(score):
    value = font_style.render("得分：" + str(score), True, white)
    game_display.blit(value, [0, 0])

# 绘制蛇的形状
def draw_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(game_display, green, [x[0], x[1], snake_block, snake_block])

# 游戏循环
def game_loop():
    # 定义蛇的初始位置
    x1 = window_width / 2
    y1 = window_height / 2
    x1_change = 0
    y1_change = 0

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

    # 定义食物的位置
    foodx = round(random.randrange(0, window_width - block_size) / 10.0) * 10.0
    foody = round(random.randrange(0, window_height - block_size) / 10.0) * 10.0

    # 游戏是否结束的标志
    game_exit = False

    # 得分
    score = 0

    # 游戏主循环
    while not game_exit:
        # 处理事件
        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:
                    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
        # 判断蛇是否撞墙
        if x1 >= window_width or x1 < 0 or y1 >= window_height or y1 < 0:
            game_exit = True
        # 更新蛇的位置和长度
        x1 += x1_change
        y1 += y1_change
        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]
        # 判断是否吃到食物
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, window_width - block_size) / 10.0) * 10.0
            foody = round(random.randrange(0, window_height - block_size) / 10.0) * 10.0
            length_of_snake += 1
            score += 10
        # 绘制游戏界面
        game_display.fill(black)
        pygame.draw.rect(game_display, red, [foodx, foody, block_size, block_size])
        draw_snake(block_size, snake_list)
        our_score(score)
        pygame.display.update()
        # 设置游戏的帧率
        clock = pygame.time.Clock()
        clock.tick(15)

    pygame.quit()
    quit()

game_loop()

说明：

此段程序使用Pygame模块绘制了一个简单的贪吃蛇游戏，玩家可以通过上下左右控制蛇的移动，并吃到随机出现的食物来增加分数。当蛇碰到墙或者自己时，游戏结束。整个游戏界面每帧都会重新绘制一次。最后，调用game_loop()函数即可开始游戏。