帮我写一段贪吃蛇代码

好的，以下是一个简单的贪吃蛇游戏的 Python 代码，你可以在命令行中运行它：

import curses
import time
import random


# 初始化 curses 库
screen = curses.initscr()
curses.curs_set(0)
screen_height, screen_width = screen.getmaxyx()
window = curses.newwin(screen_height, screen_width, 0, 0)
window.keypad(1)
window.timeout(100)

# 初始化蛇和食物
snake_x = screen_width // 4
snake_y = screen_height // 2
snake = [[snake_y, snake_x], [snake_y, snake_x - 1], [snake_y, snake_x - 2]]
food = [screen_height // 2, screen_width // 2]
window.addch(food[0], food[1], curses.ACS_PI)

# 初始化游戏状态
key = curses.KEY_RIGHT
score = 0

# 开始游戏循环
while True:
    next_key = window.getch()
    key = key if next_key == -1 else next_key

    # 计算蛇的下一个位置
    snake_head = [snake[0][0], snake[0][1]]
    if key == curses.KEY_DOWN:
        snake_head[0] += 1
    elif key == curses.KEY_UP:
        snake_head[0] -= 1
    elif key == curses.KEY_LEFT:
        snake_head[1] -= 1
    elif key == curses.KEY_RIGHT:
        snake_head[1] += 1
    snake.insert(0, snake_head)

    # 判断蛇是否吃到了食物
    if snake_head == food:
        food = None
        score += 1
        while food is None:
            new_food = [random.randint(1, screen_height - 1),
                        random.randint(1, screen_width - 1)]
            food = new_food if new_food not in snake else None
        window.addch(food[0], food[1], curses.ACS_PI)
    else:
        tail = snake.pop()
        window.addch(tail[0], tail[1], ' ')

    # 绘制蛇和食物
    window.addch(snake[0][0], snake[0][1], curses.ACS_CKBOARD)
    window.addch(snake[-1][0], snake[-1][1], curses.ACS_CKBOARD)
    for i in range(1, len(snake) - 1):
        window.addch(snake[i][0], snake[i][1], curses.ACS_BLOCK)

    # 判断游戏是否结束
    if (snake_head[0] in [0, screen_height - 1] or
            snake_head[1] in [0, screen_width - 1] or
            snake_head in snake[1:]):
        msg = "Game over! Your score is %d" % score
        window.addstr(screen_height // 2, (screen_width - len(msg)) // 2, msg)
        window.refresh()
        time.sleep(3)
        break

# 结束游戏并关闭 curses 库
curses.endwin()

这段代码使用了 curses 库来实现了一个简单的贪吃蛇游戏。在运行代码之前，需要先安装 curses 库，你可以使用以下命令进行安装：

pip install windows-curses  # Windows 系统上
pip install curses         # Linux 或者 macOS 系统上

希望这个代码能够对你有所帮助！