KeyError: ‘Scene does not contain a layer named: zd‘错误分析

运行错误：

Traceback (most recent call last):
  File "E:/pgame/arcadegame/game16-射击及子㢹.py", line 363, in
    main()
  File "E:/pgame/arcadegame/game16-射击及子㢹.py", line 359, in main
    arcade.run()
  File "E:\pgame\venv\lib\site-packages\arcade\window_commands.py", line 323, in run
    pyglet.app.run()
  File "E:\pgame\venv\lib\site-packages\pyglet\app\__init__.py", line 107, in run
    event_loop.run(interval)
  File "E:\pgame\venv\lib\site-packages\pyglet\app\base.py", line 184, in run
    timeout = self.idle()
  File "E:\pgame\venv\lib\site-packages\pyglet\app\base.py", line 245, in idle
    self.clock.call_scheduled_functions(dt)
  File "E:\pgame\venv\lib\site-packages\pyglet\clock.py", line 277, in call_scheduled_functions
    item.func(now - item.last_ts, *item.args, **item.kwargs)
  File "E:\pgame\venv\lib\site-packages\arcade\application.py", line 318, in _dispatch_updates
    self.dispatch_event('on_update', delta_time)
  File "E:\pgame\venv\lib\site-packages\pyglet\window\__init__.py", line 1361, in dispatch_event
    super().dispatch_event(*args)
  File "E:\pgame\venv\lib\site-packages\pyglet\event.py", line 422, in dispatch_event
    if getattr(self, event_type)(*args):
  File "E:/pgame/arcadegame/game16-射击及子㢹.py", line 283, in on_update
    for bullet in self.scene[LAYER_bullet]:
  File "E:\pgame\venv\lib\site-packages\arcade\scene.py", line 75, in __getitem__
    raise KeyError(f"Scene does not contain a layer named: {key}")
KeyError: 'Scene does not contain a layer named: zd'

代码：

# 子弹加载
        if self.can_shoot:
            if self.shoot_pressed:
                arcade.play_sound(self.shoot_sound)
                bullet = arcade.Sprite(
                    ":resources:images/space_shooter/laserBlue01.png",
                    BULLET_scale,
                )
 
                if self.wanjia.facing_direction == R_facing:
                    bullet.change_x = BULLET_speed
                else:
                    bullet.change_x = -BULLET_speed
 
                bullet.center_x = self.wanjia.center_x
                bullet.center_y = self.wanjia.center_y
 
                self.scene.add_sprite(LAYER_bullet, bullet)
 
                self.can_shoot = False
        else:
            self.shoot_timer += 1
            if self.shoot_timer == SHOOT_speed:
                self.can_shoot = True
                self.shoot_timer = 0
 
        # 更新敌人及子弹
        self.scene.update([LAYER_enemies])  # , LAYER_bullet
 
        for bullet in self.scene[LAYER_bullet]:
            hit_list = arcade.check_for_collision_with_lists(
                bullet,
                [
                    self.scene[LAYER_enemies],
                    self.scene[LAYER_tree],
                ],
            )
 
            if hit_list:
                bullet.remove_from_sprite_lists()
 
                for collision in hit_list:
                    if (self.scene[LAYER_enemies]  in collision.sprite_lists):
                        # The collision was with an enemy
                        collision.health -= BULLET_shanghai
 
                        if collision.health <= 0:
                            collision.remove_from_sprite_lists()
                            self.score += 100
 
                        # Hit sound
                        arcade.play_sound(self.hit_sound)
 
                return

原因：

Scene does not contain a layer named: zd

场景不包含名为：zd的层

解决：

在setup中增加

# 增加子弹层
self.scene.add_sprite_list(LAYER_bullet)