如何在 Pygame 中使用空格键实现子弹射击？

<code class="python">class Bullet:
    def __init__(self, x, y):
        # Initial properties
        self.x = x
        self.y = y
        self.radius = 10
        self.speed = 10

    def update(self):
        # Move the bullet
        self.y -= self.speed

    def draw(self):
        # Draw the bullet
        pygame.draw.circle(d, (255, 0, 0), (self.x, self.y), self.radius)

class Player:
    def __init__(self, x, y, height, width):
        # Initial properties
        self.x = x
        self.y = y
        self.height = height
        self.width = width
        self.speed = 2

    def draw(self):
        # Draw the player
        pygame.draw.rect(d, (0, 0, 0), (self.x, self.y, self.width, self.height))

    def move_left(self):
        # Move player left
        self.x -= self.speed

    def move_right(self):
        # Move player right
        self.x += self.speed</code>

<code class="python"># Initialize game
pygame.init()
clock = pygame.time.Clock()
d = pygame.display.set_mode((1200, 600))

# Define objects
bullets = []
p = Player(600, 500, 50, 30)

# Main loop
run = True
while run:
    # Handle events
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                bullets.append(Bullet(p.x + p.width // 2, p.y))

    # Update objects
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        p.move_left()
    if keys[pygame.K_RIGHT]:
        p.move_right()
    for b in bullets:
        b.update()
        if b.y < 0:
            bullets.remove(b)

    # Clear display
    d.fill((98, 98, 98))

    # Draw scene
    for b in bullets:
        b.draw()
    p.draw()

    # Update display
    pygame.display.update()
    clock.tick(100)</code>