class_docstr: Helper policy class for testing hvp classes
class_docstr_tok: ["Helper","policy","class","for","testing","hvp","classes"]
code: def get_action(self, observation):
      pass
  
imports: import pickle
  import numpy
  import pytest
  import tensorflow
  from garage.tf.models import Module
  from garage.tf.optimizers.conjugate_gradient_optimizer import ConjugateGradientOptimizer
  from garage.tf.optimizers.conjugate_gradient_optimizer import FiniteDifferenceHVP
  from garage.tf.optimizers.conjugate_gradient_optimizer import _cg, PearlmutterHVP
  from garage.tf.policies import Policy
  from tests.fixtures import TfGraphTestCase
label_desc: Use image node_id 2 for calling the HelperPolicy obj's underlying member method code with example usage: obj.get_action(observation) without return types