code: def __init__(self):
      pass
  
file_path: ray/doc/source/ray-core/doc_code/placement_group_example.py
imports: from pprint import pprint
  import time
  from ray.util.placement_group import placement_group, placement_group_table, remove_placement_group
  from ray.util.scheduling_strategies import PlacementGroupSchedulingStrategy
  import ray
label_desc: Use image node_id 1 to create a new Actor object  with example: obj = Actor()