用python编段贪吃蛇代码

好的，这是一个简单的贪吃蛇游戏的Python程序，可以供你参考：

import pygame
import random
 
# 初始化 Pygame
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
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("贪吃蛇")
 
# 定义蛇的初始位置、大小和移动速度
snake_pos = [100, 50]
snake_body = [[100, 50], [90, 50], [80, 50]]
snake_speed = [10, 0]
 
# 定义食物的初始位置和大小
food_pos = [random.randrange(1, (SCREEN_WIDTH//10)) * 10, random.randrange(1, (SCREEN_HEIGHT//10)) * 10]
food_size = [10, 10]
 
# 定义字体
font = pygame.font.SysFont(None, 25)
 
# 定义游戏结束函数
def game_over():
    msg = font.render("游戏结束，按 Q 或任意键退出", True, RED)
    msg_rect = msg.get_rect()
    msg_rect.center = (SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2)
    screen.blit(msg, msg_rect)
    pygame.display.flip()
 
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_q:
                    pygame.quit()
                    sys.exit()
                else:
                    return
 
# 游戏主循环
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                snake_speed = [-10, 0]
            elif event.key == pygame.K_RIGHT:
                snake_speed = [10, 0]
            elif event.key == pygame.K_UP:
                snake_speed = [0, -10]
            elif event.key == pygame.K_DOWN:
                snake_speed = [0, 10]
 
    # 移动蛇的身体
    for i in range(len(snake_body)-1, 0, -1):
        snake_body[i] = list(snake_body[i-1])
    snake_pos[0] += snake_speed[0]
    snake_pos[1] += snake_speed[1]
    snake_body[0] = list(snake_pos)
 
    # 检查蛇是否吃到了食物
    if snake_pos == food_pos:
        food_pos = [random.randrange(1, (SCREEN_WIDTH//10)) * 10, random.randrange(1, (SCREEN_HEIGHT//10)) * 10]
        snake_body.append([0, 0])
 
    # 检查蛇是否撞到了墙或自己
    if snake_pos[0] < 0 or snake_pos[0] > SCREEN_WIDTH-10:
        game_over()
    if snake_pos[1] < 0 or snake_pos[1] > SCREEN_HEIGHT-10:
        game_over()
    for block in snake_body[1:]:
        if snake_pos == block:
            game_over()
 
    # 绘制游戏界面
    screen.fill(BLACK)
    for pos in snake_body:
        pygame.draw.rect(screen, GREEN, pygame.Rect(pos[0], pos[1], 10, 10))
    pygame.draw.rect(screen, BLUE, pygame.Rect(food_pos[0], food_pos[1], food_size[0], food_size[1]))
    pygame.display.update()
 
    # 控制游戏速度
    pygame.time.Clock().tick(20)

注意，该程序需要 Pygame 库的支持，如果你还没有安装 Pygame，请先安装它再运行程序。