### 使用Python标准库构建贪吃蛇游戏 为了创建一个完全依赖于Python标准库的贪吃蛇游戏，可以利用`curses`模块处理终端输入和图形显示。此方法不需要安装额外的第三方包，适合学习基本的游戏编程概念。 #### 游戏初始化与配置 首先定义一些全局变量用于设置窗口大小、初始速度以及食物字符等参数[^1]： ```python import curses from random import randint # 定义方向常量 UP = (-1, 0) DOWN = (1, 0) LEFT = (0, -1) RIGHT = (0, 1) def main(stdscr): # 初始化屏幕并隐藏光标 curses.curs_set(0) sh, sw = stdscr.getmaxyx() w = curses.newwin(sh, sw, 0, 0) w.keypad(True) w.timeout(100) # 设置刷新时间间隔 snk_x = sw//4 snk_y = sh//2 snake = [ (snk_y, snk_x), (snk_y, snk_x-1), (snk_y, snk_x-2) ] ``` #### 控制逻辑实现 接着是主要循环部分，在这里实现了玩家按键响应机制以及碰撞检测等功能: ```python key = curses.KEY_RIGHT # 初始方向向右 food = None while True: next_key = w.getch() # 获取下一个键入 key = key if next_key == -1 else next_key new_head = snake[0][0] + UP[0], snake[0][1] + UP[1] if key == curses.KEY_DOWN and prev_key != curses.KEY_UP or \ key == curses.KEY_UP and prev_key != curses.KEY_DOWN or \ key == curses.KEY_LEFT and prev_key != curses.KEY_RIGHT or \ key == curses.KEY_RIGHT and prev_key != curses.KEY_LEFT: prev_key = key if key == curses.KEY_DOWN: new_head = (snake[0][0]+1, snake[0][1]) elif key == curses.KEY_UP: new_head = (snake[0][0]-1, snake[0][1]) elif key == curses.KEY_LEFT: new_head = (snake[0][0], snake[0][1]-1) elif key == curses.KEY_RIGHT: new_head = (snake[0][0], snake[0][1]+1) if food is None: food = create_food(snake, sh, sw) if check_collision(new_head, snake, sh, sw): break snake.insert(0, new_head) if snake[0] == food: score += 1 food = None else: tail = snake.pop() draw_screen(w, snake, food, score) ``` #### 辅助功能函数 最后添加几个辅助性的子程序来完成剩余的任务，比如生成新的食物位置、绘制界面等内容: ```python def create_food(snake_body, screen_height, screen_width): """随机生成不在蛇身上的坐标作为新食物的位置""" while True: pos = (randint(1, screen_height-2), randint(1, screen_width-2)) if pos not in snake_body: return pos def check_collision(head_pos, body_parts, height, width): """判断头部是否撞墙或自相交""" y, x = head_pos return ( y in [0, height] or x in [0, width] or head_pos in body_parts[1:] ) def draw_screen(window, snake_positions, apple_position=None, points=0): window.clear() for part in snake_positions: window.addstr(part[0], part[1], '#') if apple_position: window.addstr(apple_position[0], apple_position[1], '*') window.addstr(0, 2, f'Score : {points}') window.refresh() if __name__ == '__main__': try: curses.wrapper(main) except Exception as e: print(f'Game Over! Error occurred: {e}') ```