用python编写贪吃蛇

好的，以下是一个简单的贪吃蛇游戏的Python代码：

import pygame
import random

# 初始化Pygame
pygame.init()

# 创建屏幕
screen = pygame.display.set_mode((640, 480))

# 设置标题
pygame.display.set_caption('Snake Game')

# 加载图像
snake_head_image = pygame.image.load('assets/snake_head.png').convert_alpha()
snake_body_image = pygame.image.load('assets/snake_body.png').convert_alpha()
apple_image = pygame.image.load('assets/apple.png').convert_alpha()

# 设置游戏参数
clock = pygame.time.Clock()
snake_direction = 'right'
snake_body = [(320, 240), (300, 240), (280, 240)]
apple_position = (random.randint(0, 31) * 20, random.randint(0, 23) * 20)

# 设置分数
score = 0
font = pygame.font.Font('04B_19.ttf', 40)

# 游戏循环
while True:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()
        if event.type == pygame.KEYDOWN:
            if 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'
            elif 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'

    # 移动蛇头
    if snake_direction == 'up':
        snake_head_position = (snake_body[0][0], snake_body[0][1] - 20)
    elif snake_direction == 'down':
        snake_head_position = (snake_body[0][0], snake_body[0][1] + 20)
    elif snake_direction == 'left':
        snake_head_position = (snake_body[0][0] - 20, snake_body[0][1])
    elif snake_direction == 'right':
        snake_head_position = (snake_body[0][0] + 20, snake_body[0][1])

    # 检测碰撞
    if snake_head_position == apple_position:
        apple_position = (random.randint(0, 31) * 20, random.randint(0, 23) * 20)
        score += 1
        snake_body.append(snake_body[-1])
    elif snake_head_position[0] < 0 or snake_head_position[0] >= 640 or snake_head_position[1] < 0 or snake_head_position[1] >= 480 or snake_head_position in snake_body:
        pygame.quit()
        exit()
    else:
        snake_body.pop()

    # 更新蛇身
    snake_body.insert(0, snake_head_position)

    # 移动苹果
    apple_rect = apple_image.get_rect(topleft=apple_position)
    if apple_rect.collidelist(snake_body) != -1:
        apple_position = (random.randint(0, 31) * 20, random.randint(0, 23) * 20)

    # 移动背景
    screen.fill((0, 0, 0))
    for i, position in enumerate(snake_body):
        if i == 0:
            screen.blit(snake_head_image, position)
        else:
            screen.blit(snake_body_image, position)
    screen.blit(apple_image, apple_position)

    # 更新分数
    score_surface = font.render(str(score), True, (255, 255, 255))
    score_rect = score_surface.get_rect(center=(320, 30))
    screen.blit(score_surface, score_rect)

    # 更新屏幕
    pygame.display.update()

    # 控制帧率
    clock.tick(10)

注意：在运行此代码之前，需要将相关图像文件放置在名为“assets”的文件夹中。