能否提供一个编写贪吃蛇游戏的Python代码示例？

当然可以。这是一个简单的Python贪吃蛇游戏的框架代码示例，它使用了基本的控制台界面和pygame库来创建游戏窗口：

import pygame
import random

# 初始化pygame
pygame.init()

# 设置屏幕尺寸
screen_width = 600
screen_height = 400
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("贪吃蛇")

snake_speed = 15
snake_block_size = 10
snake_direction = "right"

snake = [[20, screen_height // 2], [snake_block_size, screen_height // 2 - snake_block_size], [snake_block_size * 2, screen_height // 2 - snake_block_size * 2]]
food = [random.randint(0, screen_width - snake_block_size), random.randint(0, screen_height - snake_block_size)]

clock = pygame.time.Clock()
game_over = False

while not game_over:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over = True
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT and snake_direction != "right":
                snake_direction = "left"
            elif event.key == pygame.K_RIGHT and snake_direction != "left":
                snake_direction = "right"
            elif event.key == pygame.K_UP and snake_direction != "down":
                snake_direction = "up"
            elif event.key == pygame.K_DOWN and snake_direction != "up":
                snake_direction = "down"

    # 更新蛇的位置
    new_head = list(snake[0])
    if snake_direction == "right":
        new_head[0] += snake_block_size
    elif snake_direction == "left":
        new_head[0] -= snake_block_size
    elif snake_direction == "up":
        new_head[1] -= snake_block_size
    elif snake_direction == "down":
        new_head[1] += snake_block_size

    snake.insert(0, new_head)

    # 检查边界和碰撞
    if snake[0][0] < 0 or snake[0][0] >= screen_width or snake[0][1] < 0 or snake[0][1] >= screen_height:
        game_over = True
    for body_part in snake[1:]:
        if body_part == snake[0]:
            game_over = True
            break

    # 移动食物
    food_x, food_y = food
    if food_x == snake[0][0] and food_y == snake[0][1]:
        food = [random.randint(0, screen_width - snake_block_size), random.randint(0, screen_height - snake_block_size)]
    else:
        food = [food_x + random.choice([-snake_block_size, snake_block_size]), food_y + random.choice([-snake_block_size, snake_block_size])]

    # 绘制屏幕
    screen.fill((0, 0, 0))  # 黑色背景
    for block in snake:
        pygame.draw.rect(screen, (255, 0, 0), pygame.Rect(block[0], block[1], snake_block_size, snake_block_size))
    pygame.draw.rect(screen, (0, 255, 0), pygame.Rect(food[0], food[1], snake_block_size, snake_block_size))

    pygame.display.flip()
    clock.tick(snake_speed)

# 游戏结束
pygame.quit()

这个代码只是一个基础版本，实际游戏中还需要处理更多细节，比如玩家得分、循环判断等。如果你想了解更多关于贪吃蛇游戏开发的知识，可以在网上查找更详细的教程或源码。