code: def __init__(self, cref, process_group):
      r"""
      A class that holds state information that is needed by the communication hook
      during the training algorithm.
      Args:
          cref (DdpTrainer): reference to the self keyword of the trainer instance
          process_group (ProcessGroup): distributed process group
      """
      self.cref = cref
      self.process_group = process_group
      self.batch_number = -1
  
label_desc: Use image node_id 1 to create a new BasicHookState object  with example: obj = BasicHookState(cref, process_group)