生成一个贪吃蛇的简单代码

以下是一个简单的贪吃蛇代码，使用Python实现：

import pygame
import random

# 初始化游戏
pygame.init()

# 定义游戏界面大小、背景颜色和帧率
width, height = 640, 480
bg_color = (255, 255, 255)
fps = 10

# 创建游戏界面
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("贪吃蛇")

# 定义蛇的初始位置和大小
snake_size = 20
snake_x, snake_y = width // 2, height // 2
snake_body = [(snake_x, snake_y), (snake_x - snake_size, snake_y), (snake_x - 2 * snake_size, snake_y)]

# 定义食物的初始位置和大小
food_size = 20
food_x, food_y = random.randint(0, (width - food_size) // food_size) * food_size, \
                 random.randint(0, (height - food_size) // food_size) * food_size

# 定义蛇移动的方向
direction = "right"

# 游戏循环
while True:
    # 监听游戏事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()

    # 获取用户的键盘输入
    keys = pygame.key.get_pressed()
    if keys[pygame.K_UP]:
        direction = "up"
    elif keys[pygame.K_DOWN]:
        direction = "down"
    elif keys[pygame.K_LEFT]:
        direction = "left"
    elif keys[pygame.K_RIGHT]:
        direction = "right"

    # 根据蛇的移动方向更新蛇的位置
    if direction == "up":
        snake_y -= snake_size
    elif direction == "down":
        snake_y += snake_size
    elif direction == "left":
        snake_x -= snake_size
    elif direction == "right":
        snake_x += snake_size

    # 更新蛇的身体
    snake_body.insert(0, (snake_x, snake_y))
    if snake_x == food_x and snake_y == food_y:
        food_x, food_y = random.randint(0, (width - food_size) // food_size) * food_size, \
                         random.randint(0, (height - food_size) // food_size) * food_size
    else:
        snake_body.pop(-1)

    # 绘制游戏界面
    screen.fill(bg_color)
    pygame.draw.rect(screen, (255, 0, 0), (food_x, food_y, food_size, food_size))
    for x, y in snake_body:
        pygame.draw.rect(screen, (0, 255, 0), (x, y, snake_size, snake_size))
    pygame.display.update()

    # 控制游戏帧率
    pygame.time.Clock().tick(fps)

这个代码使用了Pygame库，可以直接执行并且在窗口中显示贪吃蛇游戏。