class_docstr: Base class inherited by RL agents.
  
  Args:
      TODO
docstr: Returns a dictionary of hyperparameters with default values.
  
  TODO
code: def default_hparams():
      """Returns a dictionary of hyperparameters with default values.
  
      TODO
      """
      return {"name": "agent"}
  
file_path: texar/texar/tf/agents/agent_base.py
imports: from texar.tf.hyperparams import HParams
  from texar.tf.utils.variables import get_unique_named_variable_scope
label_desc: Use image node_id 2 for calling the AgentBase obj's underlying member method code with example usage: obj.default_hparams() and returns: dict