用python写贪吃蛇

好的，下面是一个简单的Python贪吃蛇游戏代码，希望对你有所帮助：

import pygame
import random

# 初始化Pygame
pygame.init()

# 定义颜色
black = pygame.Color(0, 0, 0)
white = pygame.Color(255, 255, 255)
red = pygame.Color(255, 0, 0)
green = pygame.Color(0, 255, 0)
blue = pygame.Color(0, 0, 255)

# 设置游戏窗口大小和标题
screen_width = 640
screen_height = 480
pygame.display.set_caption('贪吃蛇')
screen = pygame.display.set_mode((screen_width, screen_height))

# 定义游戏帧率和时钟对象
fps = pygame.time.Clock()

# 定义贪吃蛇的初始位置和大小
snake_position = [100, 50]
snake_body = [[100, 50], [90, 50], [80, 50]]

# 定义食物的初始位置
food_position = [random.randrange(1, screen_width // 10) * 10,
                 random.randrange(1, screen_height // 10) * 10]

# 定义食物的大小
food_size = [10, 10]

# 定义初始方向
direction = 'RIGHT'
change_direction = direction

# 定义字体对象
font = pygame.font.SysFont('simhei', 18)

def show_score(score):
    """显示得分"""
    score_text = font.render('得分: ' + str(score), True, white)
    screen.blit(score_text, [0, 0])

def game_over():
    """游戏结束"""
    gameover_text = font.render('游戏结束!', True, white)
    gameover_rect = gameover_text.get_rect()
    gameover_rect.midtop = (screen_width / 2, screen_height / 4)
    screen.blit(gameover_text, gameover_rect)
    pygame.display.flip()
    pygame.time.delay(2000)
    pygame.quit()
    quit()

# 开始游戏循环
score = 0
while True:
    # 处理游戏事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                change_direction = 'RIGHT'
            elif event.key == pygame.K_LEFT:
                change_direction = 'LEFT'
            elif event.key == pygame.K_UP:
                change_direction = 'UP'
            elif event.key == pygame.K_DOWN:
                change_direction = 'DOWN'
            elif event.key == pygame.K_ESCAPE:
                pygame.quit()
                quit()

    # 判断是否改变方向
    if change_direction == 'RIGHT' and not direction == 'LEFT':
        direction = 'RIGHT'
    elif change_direction == 'LEFT' and not direction == 'RIGHT':
        direction = 'LEFT'
    elif change_direction == 'UP' and not direction == 'DOWN':
        direction = 'UP'
    elif change_direction == 'DOWN' and not direction == 'UP':
        direction = 'DOWN'

    # 移动贪吃蛇
    if direction == 'RIGHT':
        snake_position[0] += 10
    elif direction == 'LEFT':
        snake_position[0] -= 10
    elif direction == 'UP':
        snake_position[1] -= 10
    elif direction == 'DOWN':
        snake_position[1] += 10

    # 更新贪吃蛇的身体
    snake_body.insert(0, list(snake_position))
    if snake_position == food_position:
        food_position = [random.randrange(1, screen_width // 10) * 10,
                         random.randrange(1, screen_height // 10) * 10]
        score += 10
    else:
        snake_body.pop()

    # 绘制游戏界面
    screen.fill(black)
    for position in snake_body:
        pygame.draw.rect(screen, green, pygame.Rect(
            position[0], position[1], 10, 10))
    pygame.draw.rect(screen, red, pygame.Rect(
        food_position[0], food_position[1], food_size[0], food_size[1]))
    show_score(score)
    pygame.display.update()

    # 判断游戏是否结束
    if snake_position[0] < 0 or snake_position[0] > screen_width - 10:
        game_over()
    elif snake_position[1] < 0 or snake_position[1] > screen_height - 10:
        game_over()
    for block in snake_body[1:]:
        if snake_position == block:
            game_over()

    # 控制游戏帧率
    fps.tick(20)

该代码使用Pygame库实现了一个简单的贪吃蛇游戏，主要包括游戏界面的绘制、键盘事件的处理、贪吃蛇的移动、得分的显示、游戏结束等功能。你可以直接将代码复制到Python环境中运行，体验游戏的效果。