code: def policy(self, obs):
      return self.actor_model(obs)
  
file_path: PARL/benchmark/torch/maddpg/simple_model.py
imports: import parl
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 2 for calling the MAModel obj's underlying member method code with example usage: obj.policy(obs) and returns: self