使用python写一个贪吃蛇游戏

好的，下面是一个简单的贪吃蛇游戏代码示例：

import pygame
import random

# 初始化pygame
pygame.init()

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

# 设置窗口大小
size = (500, 500)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("贪吃蛇游戏")

# 设置游戏时钟
clock = pygame.time.Clock()

# 定义贪吃蛇类
class Snake:
    def __init__(self):
        self.snake_list = [(250, 250), (240, 250), (230, 250)]
        self.direction = "right"
    
    def move(self):
        if self.direction == "right":
            head = (self.snake_list[0][0]+10, self.snake_list[0][1])
        elif self.direction == "left":
            head = (self.snake_list[0][0]-10, self.snake_list[0][1])
        elif self.direction == "up":
            head = (self.snake_list[0][0], self.snake_list[0][1]-10)
        elif self.direction == "down":
            head = (self.snake_list[0][0], self.snake_list[0][1]+10)
        
        self.snake_list.insert(0, head)
        self.snake_list.pop(-1)
        
    def change_direction(self, direction):
        if direction == "right" and self.direction != "left":
            self.direction = "right"
        elif direction == "left" and self.direction != "right":
            self.direction = "left"
        elif direction == "up" and self.direction != "down":
            self.direction = "up"
        elif direction == "down" and self.direction != "up":
            self.direction = "down"

# 定义食物类
class Food:
    def __init__(self):
        self.position = (random.randint(0, 49)*10, random.randint(0, 49)*10)
        
    def generate(self):
        self.position = (random.randint(0, 49)*10, random.randint(0, 49)*10)

# 创建贪吃蛇和食物对象
snake = Snake()
food = Food()

# 是否结束游戏的标志
game_over = False

# 游戏循环
while not game_over:
    # 处理游戏事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over = True
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                snake.change_direction("right")
            elif event.key == pygame.K_LEFT:
                snake.change_direction("left")
            elif event.key == pygame.K_UP:
                snake.change_direction("up")
            elif event.key == pygame.K_DOWN:
                snake.change_direction("down")
    
    # 移动贪吃蛇
    snake.move()
    
    # 判断是否吃到食物
    if snake.snake_list[0] == food.position:
        food.generate()
        snake.snake_list.append(snake.snake_list[-1])
    
    # 判断是否游戏结束
    if snake.snake_list[0][0] < 0 or snake.snake_list[0][0] >= 500 or snake.snake_list[0][1] < 0 or snake.snake_list[0][1] >= 500:
        game_over = True
    for i in range(1, len(snake.snake_list)):
        if snake.snake_list[0] == snake.snake_list[i]:
            game_over = True
    
    # 绘制游戏画面
    screen.fill(white)
    for pos in snake.snake_list:
        pygame.draw.rect(screen, green, [pos[0], pos[1], 10, 10])
    pygame.draw.rect(screen, red, [food.position[0], food.position[1], 10, 10])
    pygame.display.update()
    
    # 控制游戏帧率
    clock.tick(10)

# 退出pygame
pygame.quit()

运行这段代码，即可看到一个简单的贪吃蛇游戏窗口。使用方向键控制贪吃蛇的移动，尽可能吃到食物，避免碰到墙壁或自己的身体。