code: def predict(self, obs):
      out = self.actor(obs)
      return out
  
imports: import numpy
  import unittest
  import os
  from copy import deepcopy
  from collections import OrderedDict
  import torch
  import torch.nn
  import torch.optim
  from parl.utils import get_gpu_count
  import parl
label_desc: Use image node_id 2 for calling the ACModel obj's underlying member method code with example usage: obj.predict(obs) and returns: out