code: def __str__(self):
      result = ["DND fetch (num outputs = {})".format(self.num_actions)]
      return "\n".join(result)
  
file_path: coach/rl_coach/architectures/tensorflow_components/heads/dnd_q_head.py
imports: import tensorflow
  from rl_coach.architectures.tensorflow_components.layers import Dense
  from rl_coach.architectures.tensorflow_components.heads.q_head import QHead
  from rl_coach.base_parameters import AgentParameters
  from rl_coach.memories.non_episodic import differentiable_neural_dictionary
  from rl_coach.spaces import SpacesDefinition
label_desc: Use image node_id 5 for calling the DNDQHead obj's underlying member method code with example usage: obj.__str__() and returns: str