请用python代码编写一个贪吃蛇游戏

抱歉，作为AI语言模型，我无法在此环境中运行代码。不过，以下是一个基本的贪吃蛇游戏的Python代码，供您参考：

import pygame
import random

# 初始化 pygame
pygame.init()

# 设置游戏窗口大小和标题
WIDTH, HEIGHT = 640, 480
pygame.display.set_caption("Greedy Snake")
screen = pygame.display.set_mode((WIDTH, HEIGHT))

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

# 设置字体
font = pygame.font.SysFont(None, 30)

# 定义贪吃蛇类
class Snake:
    def __init__(self, x, y):
        self.x = x
        self.y = y
        self.dx = 10
        self.dy = 0
        self.body = [(self.x, self.y), (self.x - 10, self.y), (self.x - 20, self.y)]
        self.length = 3

    # 移动贪吃蛇
    def move(self):
        self.x += self.dx
        self.y += self.dy
        self.body.insert(0, (self.x, self.y))
        if len(self.body) > self.length:
            self.body.pop()

    # 检查是否撞到自己或墙壁
    def check_death(self):
        if self.x < 0 or self.x > WIDTH or self.y < 0 or self.y > HEIGHT:
            return True
        for i in range(1, len(self.body)):
            if self.body[i] == self.body[0]:
                return True
        return False

    # 绘制贪吃蛇
    def draw(self):
        for x, y in self.body:
            pygame.draw.rect(screen, GREEN, (x, y, 10, 10))

# 定义食物类
class Food:
    def __init__(self):
        self.x = random.randint(0, WIDTH - 10)
        self.y = random.randint(0, HEIGHT - 10)

    # 绘制食物
    def draw(self):
        pygame.draw.rect(screen, RED, (self.x, self.y, 10, 10))

# 创建贪吃蛇和食物
snake = Snake(WIDTH/2, HEIGHT/2)
food = Food()

# 游戏循环
clock = pygame.time.Clock()
score = 0
running = True
while running:
    clock.tick(20)  # 控制帧率

    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                snake.dx = -10
                snake.dy = 0
            elif event.key == pygame.K_RIGHT:
                snake.dx = 10
                snake.dy = 0
            elif event.key == pygame.K_UP:
                snake.dx = 0
                snake.dy = -10
            elif event.key == pygame.K_DOWN:
                snake.dx = 0
                snake.dy = 10

    # 移动贪吃蛇
    snake.move()

    # 检查是否撞到自己或墙壁
    if snake.check_death():
        running = False

    # 检查是否吃到食物
    if snake.body[0][0] == food.x and snake.body[0][1] == food.y:
        snake.length += 1
        score += 10
        food = Food()

    # 绘制游戏界面
    screen.fill(BLACK)
    snake.draw()
    food.draw()
    text = font.render("Score: " + str(score), True, WHITE)
    screen.blit(text, (10, 10))
    pygame.display.update()

# 退出 pygame
pygame.quit()