phthon写个贪吃蛇

Python是一种简单易学的编程语言，非常适合用来编写贪吃蛇游戏。下面是一个简单的Python代码示例，用于实现一个基本的贪吃蛇游戏：

import pygame
import random

# 初始化游戏
pygame.init()

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

# 设置屏幕大小和标题
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("贪吃蛇游戏")

# 定义蛇的初始位置和大小
snake_size = 20
snake_x = screen_width / 2
snake_y = screen_height / 2

# 定义蛇的移动速度
snake_speed = 10

# 定义蛇的移动方向
snake_direction = "RIGHT"

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

# 定义蛇的身体列表
snake_body = []
snake_length = 1

# 游戏主循环
running = True
while running:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 获取键盘输入
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT] and snake_direction != "RIGHT":
        snake_direction = "LEFT"
    elif keys[pygame.K_RIGHT] and snake_direction != "LEFT":
        snake_direction = "RIGHT"
    elif keys[pygame.K_UP] and snake_direction != "DOWN":
        snake_direction = "UP"
    elif keys[pygame.K_DOWN] and snake_direction != "UP":
        snake_direction = "DOWN"

    # 更新蛇的位置
    if snake_direction == "LEFT":
        snake_x -= snake_speed
    elif snake_direction == "RIGHT":
        snake_x += snake_speed
    elif snake_direction == "UP":
        snake_y -= snake_speed
    elif snake_direction == "DOWN":
        snake_y += snake_speed

    # 判断蛇是否吃到食物
    if snake_x == food_x and snake_y == food_y:
        food_x = random.randint(0, screen_width - food_size) // food_size * food_size
        food_y = random.randint(0, screen_height - food_size) // food_size * food_size
        snake_length += 1

    # 更新蛇的身体列表
    snake_body.append((snake_x, snake_y))
    if len(snake_body) > snake_length:
        del snake_body

    # 绘制背景和食物
    screen.fill(BLACK)
    pygame.draw.rect(screen, GREEN, (food_x, food_y, food_size, food_size))

    # 绘制蛇的身体
    for body_part in snake_body:
        pygame.draw.rect(screen, BLUE, (body_part, body_part, snake_size, snake_size))

    # 更新屏幕显示
    pygame.display.update()

# 退出游戏
pygame.quit()

这段代码使用了pygame库来实现游戏窗口的创建、事件处理和图形绘制等功能。通过键盘输入来控制蛇的移动方向，当蛇吃到食物时，蛇的长度增加。游戏循环不断更新蛇的位置和绘制屏幕，直到游戏结束。