以下是Python实现的复杂贪吃蛇代码，实现了游戏场景、游戏逻辑、计分等功能：
``` python
import pygame
import random
# 初始化pygame
pygame.init()
# 设置游戏界面大小、背景颜、标题
screen = pygame.display.set_mode((600, 600))
pygame.display.set_caption('Snake Game')
bg_color = pygame.Color(0, 0, 0)
# 定义游戏常量
CELL_SIZE = 20  # 每个格子的大小
COL_COUNT = _width() // CELL_SIZE  # 列数
ROW_COUNT = _height() // CELL_SIZE  # 行数
# 定义颜常量
WHITE_COLOR = pygame.Color(255, 255, 255)
GREEN_COLOR = pygame.Color(0, 255, 0)
RED_COLOR = pygame.Color(255, 0, 0)
BLACK_COLOR = pygame.Color(0, 0, 0)
# 定义贪吃蛇类
class Snake:
    def __init__(self):
        # 贪吃蛇的初始位置
        self.segments = [(5, ROW_COUNT // 2), (4, ROW_COUNT // 2), (3, ROW_COUNT // 2)]
        # 贪吃蛇的初始方向
        self.direction = 'RIGHT'
    def draw(self):
        for segment in self.segments:
            rect = pygame.Rect(segment[0] * CELL_SIZE, segment[1] * CELL_SIZE, CELL_SIZE, CELL_SIZE)
            (screen, GREEN_COLOR, rect)
    def move(self):
        # 计算贪吃蛇的头部位置
        head_x, head_y = self.segments[0]
        if self.direction == 'UP':
            head_y -= 1
        elif self.direction == 'DOWN':
            head_y += 1
        elif self.direction == 'LEFT':
            head_x -= 1
        elif self.direction == 'RIGHT':
            head_x += 1
        # 添加新头部
        self.segments.insert(0, (head_x, head_y))
        # 删除尾部
        self.segments.pop()
    def change_direction(self, direction):
        if self.direction == 'UP' and direction == 'DOWN':
            return
        if self.direction == 'DOWN' and direction == 'UP':
            return
        if self.direction == 'LEFT' and direction == 'RIGHT':
            return
        if self.direction == 'RIGHT' and direction == 'LEFT':
            return
        self.direction = direction
    def eat_food(self, food):
        if self.segments[0] == food.position:
            self.segments.append(self.segments[-1])
            return True
        return False
    def is_dead(self):
        # 撞墙
        if self.segments[0][0] < 0 or self.segments[0][0] >= COL_COUNT:
            return True
        if self.segments[0][1] < 0 or self.segments[0][1] >= ROW_COUNT:
            return True
        # 撞自己
        for i in range(1, len(self.segments)):
            if self.segments[i] == self.segments[0]:
                return True
        return False
# 定义食物类
class Food:
    def __init__(self):
        self.position = (0, 0)
        self.randomize_position()
    def randomize_position(self):
        self.position = (random.randint(0, COL_COUNT - 1), random.randint(0, ROW_COUNT - 1))
    def draw(self):
        rect = pygame.Rect(self.position[0] * CELL_SIZE, self.position[1] * CELL_SIZE, CELL_SIZE, CELL_SIZE)
        (screen, RED_COLOR, rect)
# 初始化游戏状态
score = 0
snake = Snake()
food = Food()
# 游戏循环
while True:
    # 处理事件
    for event in ():
        pe == pygame.QUIT:
            pygame.quit()
            exit()
        pe == pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                snake.change_direction('UP')
            elif event.key == pygame.K_DOWN:
                snake.change_direction('DOWN')
            elif event.key == pygame.K_LEFT:
                snake.change_direction('LEFT')
            elif event.key == pygame.K_RIGHT:
                snake.change_direction('RIGHT')
    # 移动贪吃蛇
    ve()
    # 判断是否吃到食物
贪吃蛇的编程代码
    if snake.eat_food(food):
        score += 10
        food.randomize_position()
    # 绘制游戏界面
    screen.fill(bg_color)
    snake.draw()
    food.draw()
    # 绘制分数
    score_font = pygame.font.SysFont('SimHei', 40)
    score_surf = der(f'Score: {score}', True, WHITE_COLOR)
    score_rect = _rect()
    score_rect.midtop = (_width() // 2, 10)
    screen.blit(score_surf, score_rect)
    # 判断游戏是否结束
    if snake.is_dead():
        gameover_font = pygame.font.SysFont('SimHei', 72)
        gameover_surf = der('Game Over', True, WHITE_COLOR)
        gameover_rect = _rect()
        gameover_rect.midtop = (_width() // 2, _height() // 4)
        screen.blit(gameover_surf, gameover_rect)
        pygame.display.flip()
        pygame.time.wait(2000)

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