用Python写一个小飞机游戏程序

好的，以下是一个使用Python和Pygame库编写的小飞机游戏程序示例：

import pygame
import random

# 初始化 Pygame 库
pygame.init()

# 定义游戏窗口的大小
SCREEN_WIDTH = 480
SCREEN_HEIGHT = 800
SCREEN_SIZE = (SCREEN_WIDTH, SCREEN_HEIGHT)

# 设置窗口标题
pygame.display.set_caption("小飞机游戏")

# 创建游戏窗口
screen = pygame.display.set_mode(SCREEN_SIZE)

# 加载游戏图片资源
bg_img = pygame.image.load("images/background.png")
plane_img = pygame.image.load("images/plane.png")
bullet_img = pygame.image.load("images/bullet.png")
enemy_img = pygame.image.load("images/enemy.png")

# 定义游戏变量
score = 0
font = pygame.font.SysFont(None, 32)

# 定义游戏角色
class Plane(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = plane_img
        self.rect = self.image.get_rect()
        self.rect.centerx = SCREEN_WIDTH // 2
        self.rect.bottom = SCREEN_HEIGHT - 20
        self.speed = 5
        self.bullets = pygame.sprite.Group()

    def update(self):
        key_pressed = pygame.key.get_pressed()
        if key_pressed[pygame.K_LEFT]:
            self.rect.x -= self.speed
        if key_pressed[pygame.K_RIGHT]:
            self.rect.x += self.speed
        if key_pressed[pygame.K_SPACE]:
            bullet = Bullet()
            bullet.rect.centerx = self.rect.centerx
            bullet.rect.top = self.rect.top
            self.bullets.add(bullet)

        # 控制飞机不飞出屏幕
        if self.rect.left < 0:
            self.rect.left = 0
        elif self.rect.right > SCREEN_WIDTH:
            self.rect.right = SCREEN_WIDTH

        # 更新子弹
        self.bullets.update()

    def draw(self, surface):
        surface.blit(self.image, self.rect)
        self.bullets.draw(surface)

class Bullet(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = bullet_img
        self.rect = self.image.get_rect()
        self.speed = -10

    def update(self):
        self.rect.y += self.speed
        if self.rect.bottom < 0:
            self.kill()

class Enemy(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = enemy_img
        self.rect = self.image.get_rect()
        self.rect.x = random.randint(0, SCREEN_WIDTH - self.rect.width)
        self.rect.y = random.randint(-SCREEN_HEIGHT, -self.rect.height)
        self.speed = random.randint(1, 5)

    def update(self):
        self.rect.y += self.speed
        if self.rect.top > SCREEN_HEIGHT:
            self.rect.x = random.randint(0, SCREEN_WIDTH - self.rect.width)
            self.rect.y = random.randint(-SCREEN_HEIGHT, -self.rect.height)
            self.speed = random.randint(1, 5)

# 创建游戏角色
player = Plane()
enemies = pygame.sprite.Group()
for i in range(10):
    enemy = Enemy()
    enemies.add(enemy)

# 游戏主循环
while True:
    # 事件处理
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()

    # 更新游戏角色
    player.update