用python写一个贪吃蛇

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()

# 创建游戏窗口
window_width = 800
window_height = 600
window = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption("贪吃蛇")

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

# 定义贪吃蛇类
class Snake:
    def __init__(self):
        self.x = window_width // 2
        self.y = window_height // 2
        self.direction = "right"
        self.length = 1
        self.body = [(self.x, self.y)]

    def move(self):
        if self.direction == "right":
            self.x += 10
        elif self.direction == "left":
            self.x -= 10
        elif self.direction == "up":
            self.y -= 10
        elif self.direction == "down":
            self.y += 10
        self.body.append((self.x, self.y))
        if len(self.body) > self.length:
            del self.body[0]

    def draw(self):
        for x, y in self.body:
            pygame.draw.rect(window, green, [x, y, 10, 10])

# 定义食物类
class Food:
    def __init__(self):
        self.x = random.randrange(0, window_width-10, 10)
        self.y = random.randrange(0, window_height-10, 10)

    def draw(self):
        pygame.draw.rect(window, red, [self.x, self.y, 10, 10])

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

# 定义游戏循环
clock = pygame.time.Clock()
game_over = False
while not game_over:
    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 and snake.direction != "left":
                snake.direction = "right"
            elif event.key == pygame.K_LEFT and snake.direction != "right":
                snake.direction = "left"
            elif 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"

    # 移动贪吃蛇和判断是否吃到食物
    snake.move()
    if snake.body[-1][0] == food.x and snake.body[-1][1] == food.y:
        snake.length += 1
        food = Food()

    # 判断贪吃蛇是否撞到边界或自己
    if snake.body[-1][0] < 0 or snake.body[-1][0] >= window_width or snake.body[-1][1] < 0 or snake.body[-1][1] >= window_height:
        game_over = True
    for i in range(len(snake.body)-1):
        if snake.body[-1][0] == snake.body[i][0] and snake.body[-1][1] == snake.body[i][1]:
            game_over = True

    # 绘制游戏画面
    window.fill(white)
    snake.draw()
    food.draw()
    pygame.display.update()

    # 控制游戏帧率
    clock.tick(10)

# 退出游戏
pygame.quit()
quit()

运行上述代码会打开一个窗口，可以通过方向键控制贪吃蛇的移动，当贪吃蛇吃到食物时，长度会增加，当贪吃蛇撞到边界或自己时，游戏结束。