def _fire_alien(self):
# for alien in self.aliens.sprites():
alien = random.choice(self.aliens.sprites())
new_alien_bullet = AlienBullet(self)
self.alien_bullets.add(new_alien_bullet)
new_alien_bullet.rect.midbottom = alien.rect.center
new_alien_bullet.y = float(alien.rect.y)
self.settings.last_alien_shot = time.clock()
def create_alien_bullet(ai_settings, screen, alien_bullets): """ Create alien bullets which start position's based on the random position of the fleet of aliens """ while (len(alien_bullets) < ai_settings.alien_bullets_allowed): alien_bullet = AlienBullet(ai_settings, screen) chosen_alien = choice(alien_list) alien_bullet.rect.x = chosen_alien.rect.x alien_bullet.y = float(chosen_alien.rect.y) alien_bullet.rect.y = alien_bullet.y alien_bullets.add(alien_bullet)