用python帮我写一个贪吃蛇游戏

好的，以下是一个简单的贪吃蛇游戏的Python代码，使用了Pygame库来实现图形化界面：

import pygame
import random

# 初始化Pygame
pygame.init()

# 游戏窗口大小
win_width = 500
win_height = 500

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

# 创建窗口
win = pygame.display.set_mode((win_width, win_height))
pygame.display.set_caption("贪吃蛇游戏")

# 贪吃蛇头部
snake_head = pygame.Surface((10, 10))
snake_head.fill(green)

# 食物
food = pygame.Surface((10, 10))
food.fill(red)

# 初始位置
snake_pos = [(win_width / 2, win_height / 2)]
food_pos = (random.randint(0, win_width / 10 - 1) * 10, random.randint(0, win_height / 10 - 1) * 10)

# 贪吃蛇移动方向
direction = "right"

# 游戏主循环
while True:
    # 处理退出事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()

    # 检测按键事件
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT] and direction != "right":
        direction = "left"
    elif keys[pygame.K_RIGHT] and direction != "left":
        direction = "right"
    elif keys[pygame.K_UP] and direction != "down":
        direction = "up"
    elif keys[pygame.K_DOWN] and direction != "up":
        direction = "down"

    # 移动贪吃蛇
    if direction == "left":
        x = snake_pos[0][0] - 10
        y = snake_pos[0][1]
    elif direction == "right":
        x = snake_pos[0][0] + 10
        y = snake_pos[0][1]
    elif direction == "up":
        x = snake_pos[0][0]
        y = snake_pos[0][1] - 10
    elif direction == "down":
        x = snake_pos[0][0]
        y = snake_pos[0][1] + 10

    # 判断是否撞墙
    if x < 0 or x > win_width - 10 or y < 0 or y > win_height - 10:
        pygame.quit()
        quit()

    # 判断是否吃到食物
    if (x, y) == food_pos:
        snake_pos.append((x, y))
        food_pos = (random.randint(0, win_width / 10 - 1) * 10, random.randint(0, win_height / 10 - 1) * 10)
    else:
        snake_pos.insert(0, (x, y))
        snake_pos.pop()

    # 绘制游戏界面
    win.fill(black)
    win.blit(food, food_pos)
    for pos in snake_pos:
        win.blit(snake_head, pos)
    pygame.display.update()

    # 帧率控制
    pygame.time.Clock().tick(15)

运行代码后，即可开始游戏。使用方向键控制贪吃蛇的移动方向，吃到食物后贪吃蛇会变长。如果贪吃蛇撞墙或撞到自己，游戏结束。