python跨年烟花倒计时代码

以下是一个使用Python和Pygame库实现的跨年烟花倒计时代码示例：

import pygame
import random
import time

# 初始化Pygame
pygame.init()

# 设置屏幕尺寸
width, height = 800, 600
screen = pygame.display.set_mode((width, height))

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

# 定义烟花类
class Firework:
    def __init__(self):
        self.x = random.randint(0, width)
        self.y = height
        self.speed = random.uniform(3, 7)
        self.color = (random.randint(50, 255), random.randint(50, 255), random.randint(50, 255))
        self.exploded = False
        self.particles = []

    def update(self):
        if not self.exploded:
            self.y -= self.speed
            if self.y <= random.randint(50, 300):
                self.explode()
        else:
            for particle in self.particles:
                particle[0][1] += particle[1]
                particle[0][0] += random.uniform(-1, 1)
                particle[2] -= 1
                if particle[2] <= 0:
                    self.particles.remove(particle)

    def explode(self):
        self.exploded = True
        for _ in range(100):
            angle = random.uniform(0, 2 * 3.14159)
            speed = random.uniform(1, 5)
            self.particles.append([(self.x, self.y), (speed * math.cos(angle), speed * math.sin(angle)), random.randint(30, 100)])

    def draw(self, surface):
        if not self.exploded:
            pygame.draw.circle(surface, self.color, (int(self.x), int(self.y)), 3)
        else:
            for particle in self.particles:
                pygame.draw.circle(surface, self.color, (int(particle[0][0]), int(particle[0][1])), 2)

# 主程序循环
def main():
    clock = pygame.time.Clock()
    fireworks = []
    countdown = 10  # 倒计时时间（秒）
    start_time = time.time()

    while True:
        current_time = time.time()
        elapsed = current_time - start_time
        remaining = max(0, countdown - int(elapsed))

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                return

        screen.fill(BLACK)

        if elapsed > countdown:
            # 显示"新年快乐"
            font = pygame.font.Font(None, 74)
            text = font.render("新年快乐！", True, WHITE)
            screen.blit(text, (width//2 - text.get_width()//2, height//2 - text.get_height()//2))
        else:
            # 生成新的烟花
            if random.randint(0, 100) < 2:
                fireworks.append(Firework())

            # 更新并绘制烟花
            for firework in fireworks:
                firework.update()
                firework.draw(screen)

        # 显示倒计时
        font = pygame.font.Font(None, 50)
        text = font.render(f"倒计时: {remaining}", True, WHITE)
        screen.blit(text, (10, 10))

        pygame.display.flip()
        clock.tick(60)

if __name__ == "__main__":
    main()

这段代码实现了一个简单的烟花倒计时程序：

1. 使用Pygame库来创建图形界面和处理图形绘制。
2. 定义了Firework类来模拟烟花，包括上升、爆炸和粒子扩散的效果。
3. 在主循环中，每帧都会更新烟花状态，绘制烟花和倒计时。
4. 当倒计时结束时，会显示"新年快乐！"的文字。

要运行这段代码，你需要先安装Pygame库。可以使用以下命令安装：

pip install pygame

运行后，你会看到一个黑色背景的窗口，烟花会不断绽放，同时显示倒计时。当倒计时结束时，会显示"新年快乐！"的文字。