使用python完成贪吃蛇小游戏

好的，以下是一个简单的Python实现贪吃蛇小游戏的代码，运行需要Pygame库的支持：

import pygame
import random

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

# 定义屏幕大小和格子大小
SCREEN_WIDTH = 640
SCREEN_HEIGHT = 480
GRID_SIZE = 10

# 初始化Pygame
pygame.init()

# 创建游戏窗口
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption('Snake Game')

# 创建游戏时钟
clock = pygame.time.Clock()

# 定义贪吃蛇的初始位置和长度
snake = [(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2)]
snake_length = 1

# 定义贪吃蛇的初始方向
direction = 'right'

# 定义食物的初始位置
food = (random.randint(0, SCREEN_WIDTH / GRID_SIZE - 1) * GRID_SIZE,
        random.randint(0, SCREEN_HEIGHT / GRID_SIZE - 1) * GRID_SIZE)

# 定义游戏结束标志
game_over = False

# 定义游戏循环
while not game_over:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over = True
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP and direction != 'down':
                direction = 'up'
            elif event.key == pygame.K_DOWN and direction != 'up':
                direction = 'down'
            elif event.key == pygame.K_LEFT and direction != 'right':
                direction = 'left'
            elif event.key == pygame.K_RIGHT and direction != 'left':
                direction = 'right'

    # 移动贪吃蛇
    if direction == 'up':
        head = (snake[0][0], snake[0][1] - GRID_SIZE)
    elif direction == 'down':
        head = (snake[0][0], snake[0][1] + GRID_SIZE)
    elif direction == 'left':
        head = (snake[0][0] - GRID_SIZE, snake[0][1])
    elif direction == 'right':
        head = (snake[0][0] + GRID_SIZE, snake[0][1])
    snake.insert(0, head)

    # 判断是否吃到食物
    if head == food:
        food = (random.randint(0, SCREEN_WIDTH / GRID_SIZE - 1) * GRID_SIZE,
                random.randint(0, SCREEN_HEIGHT / GRID_SIZE - 1) * GRID_SIZE)
        snake_length += 1

    # 判断是否撞到墙或自己
    if head[0] < 0 or head[0] >= SCREEN_WIDTH or head[1] < 0 or head[1] >= SCREEN_HEIGHT or head in snake[1:]:
        game_over = True

    # 删除多余的尾部
    if len(snake) > snake_length:
        snake.pop()

    # 清屏
    screen.fill(BLACK)

    # 绘制贪吃蛇
    for s in snake:
        pygame.draw.rect(screen, GREEN, (s[0], s[1], GRID_SIZE, GRID_SIZE))

    # 绘制食物
    pygame.draw.rect(screen, RED, (food[0], food[1], GRID_SIZE, GRID_SIZE))

    # 刷新屏幕
    pygame.display.flip()

    # 控制游戏帧率
    clock.tick(10)

# 退出Pygame
pygame.quit()

这个代码实现了一个简单的贪吃蛇小游戏，通过键盘控制贪吃蛇的移动方向，吃到食物可以增加长度，撞到墙或自己则游戏结束。可以根据自己的需要进行修改和扩展。