用Python做出可以计数的贪吃蛇小游戏

好的，以下是一个简单的Python计数贪吃蛇小游戏的代码实现：

import pygame
import random

# 初始化Pygame
pygame.init()

# 设置游戏界面大小、背景颜色
width, height = 640, 480
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("贪吃蛇")

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

# 定义字体
font = pygame.font.SysFont(None, 25)

# 定义蛇和食物的大小
block_size = 20

# 定义蛇的初始位置和长度
snake_pos = [100, 50]
snake_body = [[100, 50], [90, 50], [80, 50]]

# 定义食物的初始位置
food_pos = [random.randrange(1, (width // block_size)) * block_size,
            random.randrange(1, (height // block_size)) * block_size]

# 定义初始分数
score = 0

# 定义方向
direction = "RIGHT"
change_to = direction

# 定义游戏结束函数
def game_over():
    # 显示游戏结束信息
    msg = font.render("游戏结束! 按 Q 退出或按 C 重新开始", True, RED)
    screen.blit(msg, [width / 6, height / 3])

    # 刷新游戏界面
    pygame.display.update()

    # 等待用户响应
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_q:
                    pygame.quit()
                    quit()
                elif event.key == pygame.K_c:
                    game_loop()

# 定义游戏主循环函数
def game_loop():
    # 声明全局变量
    global direction, change_to, score, snake_pos, snake_body, food_pos

    # 判断是否撞墙或撞到自己
    if snake_pos[0] < 0 or snake_pos[0] > width - block_size or snake_pos[1] < 0 or snake_pos[1] > height - block_size:
        game_over()

    for block in snake_body[1:]:
        if snake_pos[0] == block[0] and snake_pos[1] == block[1]:
            game_over()

    # 判断是否吃到食物
    if snake_pos[0] == food_pos[0] and snake_pos[1] == food_pos[1]:
        food_pos = [random.randrange(1, (width // block_size)) * block_size,
                    random.randrange(1, (height // block_size)) * block_size]
        score += 1
    else:
        snake_body.pop()

    # 更新蛇的位置
    snake_body.insert(0, list(snake_pos))
    if change_to == "UP":
        snake_pos[1] -= block_size
    elif change_to == "DOWN":
        snake_pos[1] += block_size
    elif change_to == "LEFT":
        snake_pos[0] -= block_size
    elif change_to == "RIGHT":
        snake_pos[0] += block_size

    # 更新方向
    direction = change_to

    # 设置背景颜色
    screen.fill(BLACK)

    # 画蛇和食物
    for pos in snake_body:
        pygame.draw.rect(screen, WHITE, pygame.Rect(
            pos[0], pos[1], block_size, block_size))
    pygame.draw.rect(screen, RED, pygame.Rect(
        food_pos[0], food_pos[1], block_size, block_size))

    # 显示分数
    score_text = font.render(f"Score: {score}", True, WHITE)
    screen.blit(score_text, [0, 0])

    # 刷新游戏界面
    pygame.display.update()

    # 设置游戏帧率
    fps_controller.tick(15)

# 创建游戏帧率控制对象
fps_controller = pygame.time.Clock()

# 运行游戏循环
while True:
    # 监听用户事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP and direction != "DOWN":
                change_to = "UP"
            elif event.key == pygame.K_DOWN and direction != "UP":
                change_to = "DOWN"
            elif event.key == pygame.K_LEFT and direction != "RIGHT":
                change_to = "LEFT"
            elif event.key == pygame.K_RIGHT and direction != "LEFT":
                change_to = "RIGHT"

    # 调用游戏主循环函数
    game_loop()

在这个游戏中，蛇会不断地向前移动，玩家需要控制蛇的方向，让它吃到食物并不断增长身体长度，直到撞墙或撞到自己游戏结束。游戏界面上方会显示当前得分。