code: def add_actor(self, actor, actor_name="Actor"):
      actor_idx = len(self.actor_list)
  
      name = str(actor_idx) + "_" + actor_name
  
      self.actor_list.append((name, actor))
  
      if self.save_snapshots_mode:
          self.snapshots.append(np.empty((0, 11), float))
  
imports: from .None import SmokeTest
  import carla
  import time
  import numpy
  import filecmp
  import shutil
  import os
label_desc: Use image node_id 3 for calling the Scenario obj's underlying member method code with example usage: obj.add_actor(actor, actor_name) without return types