写一个贪吃蛇游戏，用python书写

当然可以！下面是一个简单的贪吃蛇游戏的Python代码示例：

import pygame
import random

# 游戏窗口大小
WINDOW_WIDTH = 800
WINDOW_HEIGHT = 600

# 蛇身和食物大小
CELL_SIZE = 20

# 颜色定义
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
RED = (255, 0, 0)

# 初始化Pygame
pygame.init()

# 创建游戏窗口
window = pygame.display.set_mode((WINDOW_WIDTH, WINDOW_HEIGHT))
pygame.display.set_caption("贪吃蛇游戏")

# 游戏时钟
clock = pygame.time.Clock()

# 蛇的初始位置和初始长度
snake_head = [WINDOW_WIDTH // 2, WINDOW_HEIGHT // 2]
snake_body = [[snake_head[0], snake_head[1]], [snake_head[0]-CELL_SIZE, snake_head[1]], [snake_head[0]-2*CELL_SIZE, snake_head[1]]]

# 初始移动方向
direction = "RIGHT"

# 食物的初始位置
food_position = [random.randrange(1, (WINDOW_WIDTH // CELL_SIZE)) * CELL_SIZE,
                 random.randrange(1, (WINDOW_HEIGHT // CELL_SIZE)) * CELL_SIZE]

# 游戏结束标志位
game_over = False

while not game_over:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over = True
        
        # 监听键盘事件，改变蛇的移动方向
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP and direction != "DOWN":
                direction = "UP"
            elif event.key == pygame.K_DOWN and direction != "UP":
                direction = "DOWN"
            elif event.key == pygame.K_LEFT and direction != "RIGHT":
                direction = "LEFT"
            elif event.key == pygame.K_RIGHT and direction != "LEFT":
                direction = "RIGHT"

    # 根据移动方向改变蛇头位置
    if direction == "UP":
        snake_head[1] -= CELL_SIZE
    elif direction == "DOWN":
        snake_head[1] += CELL_SIZE
    elif direction == "LEFT":
        snake_head[0] -= CELL_SIZE
    elif direction == "RIGHT":
        snake_head[0] += CELL_SIZE

    # 判断是否吃到食物
    if snake_head == food_position:
        # 生成新的食物位置
        food_position = [random.randrange(1, (WINDOW_WIDTH // CELL_SIZE)) * CELL_SIZE,
                         random.randrange(1, (WINDOW_HEIGHT // CELL_SIZE)) * CELL_SIZE]
    else:
        # 移除蛇尾
        snake_body.pop()

    # 判断游戏是否结束
    if snake_head[0] < 0 or snake_head[0] >= WINDOW_WIDTH or snake_head[1] < 0 or snake_head[1] >= WINDOW_HEIGHT:
        game_over = True
    elif snake_head in snake_body[1:]:
        game_over = True

    # 添加蛇头到蛇身
    snake_body.insert(0, list(snake_head))

    # 绘制游戏窗口
    window.fill(BLACK)
    for pos in snake_body:
        pygame.draw.rect(window, WHITE, pygame.Rect(pos[0], pos[1], CELL_SIZE, CELL_SIZE))
    pygame.draw.rect(window, RED, pygame.Rect(food_position[0], food_position[1], CELL_SIZE, CELL_SIZE))

    # 刷新游戏窗口
    pygame.display.flip()

    # 控制游戏帧率
    clock.tick(10)

# 退出游戏
pygame.quit()

这个代码实现了一个简单的贪吃蛇游戏，你可以运行它来尝试玩一下。希望对你有帮助！