code: def predict(self, obs):
      return self.model.policy(obs)
  
file_path: PARL/parl/algorithms/torch/ddpg.py
imports: import torch
  import torch.nn.functional
  from copy import deepcopy
  import parl
  from parl.utils.utils import check_model_method
label_desc: Use image node_id 2 for calling the DDPG obj's underlying member method code with example usage: obj.predict(obs) and returns: self