用python代码实现贪吃蛇游戏

可以使用pygame库来实现贪吃蛇游戏，以下是一个简单的实现：

import pygame
import random

# 初始化pygame
pygame.init()

# 设置游戏窗口大小
window_width = 640
window_height = 480
window = pygame.display.set_mode((window_width, window_height))

# 设置游戏标题
pygame.display.set_caption("贪吃蛇游戏")

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

# 定义贪吃蛇的初始位置和大小
snake_block_size = 10
snake_speed = 15
snake_list = []
snake_length = 1
snake_x = window_width / 2
snake_y = window_height / 2

# 定义食物的初始位置和大小
food_block_size = 10
food_x = round(random.randrange(0, window_width - food_block_size) / 10.0) * 10.0
food_y = round(random.randrange(0, window_height - food_block_size) / 10.0) * 10.0

# 定义字体
font_style = pygame.font.SysFont(None, 30)

# 定义显示分数的函数
def show_score(score):
    score_text = font_style.render("Score: " + str(score), True, black)
    window.blit(score_text, [0, 0])

# 定义游戏结束的函数
def game_over():
    game_over_text = font_style.render("Game Over!", True, red)
    window.blit(game_over_text, [window_width / 3, window_height / 3])
    pygame.display.update()
    pygame.time.delay(2000)

# 游戏循环
game_over_flag = False
while not game_over_flag:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over_flag = True

    # 获取键盘输入
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        snake_x -= snake_block_size
    elif keys[pygame.K_RIGHT]:
        snake_x += snake_block_size
    elif keys[pygame.K_UP]:
        snake_y -= snake_block_size
    elif keys[pygame.K_DOWN]:
        snake_y += snake_block_size

    # 判断是否吃到食物
    if snake_x == food_x and snake_y == food_y:
        food_x = round(random.randrange(0, window_width - food_block_size) / 10.0) * 10.0
        food_y = round(random.randrange(0, window_height - food_block_size) / 10.0) * 10.0
        snake_length += 1

    # 更新贪吃蛇的位置
    snake_head = []
    snake_head.append(snake_x)
    snake_head.append(snake_y)
    snake_list.append(snake_head)
    if len(snake_list) > snake_length:
        del snake_list[0]

    # 判断是否撞到自己
    for block in snake_list[:-1]:
        if block == snake_head:
            game_over()

    # 绘制游戏界面
    window.fill(white)
    pygame.draw.rect(window, green, [food_x, food_y, food_block_size, food_block_size])
    for block in snake_list:
        pygame.draw.rect(window, black, [block[0], block[1], snake_block_size, snake_block_size])
    show_score(snake_length - 1)
    pygame.display.update()

    # 控制游戏速度
    clock = pygame.time.Clock()
    clock.tick(snake_speed)

# 退出pygame
pygame.quit()