用pyzhon做一个有游戏开始界面的贪吃蛇游戏

A：

这里是一个简单的贪吃蛇游戏，使用Python和Pygame库实现，其中包括开始界面和游戏界面。

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)
 
# 设置游戏界面
screen_width = 640
screen_height = 480
screen = pygame.display.set_mode([screen_width, screen_height])
pygame.display.set_caption("Snake Game")
 
# 设置字体
font = pygame.font.Font(None, 36)
 
# 定义贪吃蛇类
class Snake:
    def __init__(self):
        self.x = screen_width / 2
        self.y = screen_height / 2
        self.body = [[self.x, self.y], [self.x-10, self.y], [self.x-20, self.y]]
        self.direction = "right"
        self.score = 0
    
    def update(self):
        if self.direction == "right":
            self.x += 10
        elif self.direction == "left":
            self.x -= 10
        elif self.direction == "up":
            self.y -= 10
        elif self.direction == "down":
            self.y += 10
 
        # 添加新的身体
        self.body.append([self.x, self.y])
 
        # 删除尾部
        if len(self.body) > self.score + 3:
            del self.body[0]
 
    def draw(self):
        for i in range(len(self.body)):
            pygame.draw.rect(screen, BLACK, [self.body[i][0], self.body[i][1], 10, 10])
 
    def check_food(self, food):
        if self.x == food.x and self.y == food.y:
            self.score += 1
            return True
        else:
            return False
 
    def check_collision(self):
        if self.x < 0 or self.x > screen_width - 10 or self.y < 0 or self.y > screen_height - 10:
            return True
        for i in range(3, len(self.body)):
            if self.x == self.body[i][0] and self.y == self.body[i][1]:
                return True
        return False
 
# 定义食物类
class Food:
    def __init__(self):
        self.x = random.randrange(0, screen_width - 10, 10)
        self.y = random.randrange(0, screen_height - 10, 10)
    
    def draw(self):
        pygame.draw.rect(screen, RED, [self.x, self.y, 10, 10])
 
# 显示开始界面
def show_start_screen():
    screen.fill(WHITE)
    start_text = font.render("Press SPACE to Start", True, BLACK)
    screen.blit(start_text, [screen_width/2 - start_text.get_width()/2, screen_height/2 - start_text.get_height()])
    pygame.display.flip()
    
    # 等待用户按下空格键
    waiting = True
    while waiting:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_SPACE:
                    waiting = False
 
# 显示结束界面
def show_game_over_screen(score):
    screen.fill(WHITE)
    end_text = font.render("Game Over", True, BLACK)
    score_text = font.render("Score: " + str(score), True, BLACK)
    screen.blit(end_text, [screen_width/2 - end_text.get_width()/2, screen_height/2 - end_text.get_height()])
    screen.blit(score_text, [screen_width/2 - score_text.get_width()/2, screen_height/2])
    pygame.display.flip()
    
    # 等待3秒然后退出游戏
    pygame.time.wait(3000)
    pygame.quit()
    
# 初始化游戏
def init_game():
    snake = Snake()
    food = Food()
    return snake, food
 
# 主程序
def main():
    show_start_screen()
    snake, food = init_game()
 
    # 游戏循环
    running = True
    clock = pygame.time.Clock()
    while running:
        # 处理事件
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_RIGHT and snake.direction != "left":
                    snake.direction = "right"
                elif event.key == pygame.K_LEFT and snake.direction != "right":
                    snake.direction = "left"
                elif event.key == pygame.K_UP and snake.direction != "down":
                    snake.direction = "up"
                elif event.key == pygame.K_DOWN and snake.direction != "up":
                    snake.direction = "down"
 
        # 更新贪吃蛇
        snake.update()
 
        # 检查食物碰撞
        if snake.check_food(food):
            food = Food()
 
        # 检查贪吃蛇碰撞 
        if snake.check_collision():
            show_game_over_screen(snake.score)
            running = False
 
        # 绘制游戏界面
        screen.fill(WHITE)
        snake.draw()
        food.draw()
 
        # 显示分数
        score_text = font.render("Score: " + str(snake.score), True, BLACK)
        screen.blit(score_text, [10, 10])
 
        pygame.display.flip()
        clock.tick(10)
 
if __name__ == "__main__":
    main()

这个游戏使用了 Pygame 库，它是一个 Python 的游戏开发库，提供了一些简单而强大的方法，方便开发者创建游戏。在这个代码中，我们创建了一个名为“ Snake”的类，代表贪吃蛇，也创建了一个名为“ Food”的类，代表食物。然后我们处理一些游戏逻辑，如检测是否碰到墙或自身，以及更新身体长度，这些都在 Snake 类中完成的。最后，稍作修改即可添加开始界面和结束界面。