code: def pred_batch(self, obs):
      feed = {"obs": obs}
      action = self.fluid_executor.run(
          self.ensemble_predict_program,
          feed=feed,
          fetch_list=self.ensemble_predict_output,
      )[0]
      return action
  
imports: import numpy
  import parl.layers
  from mlp_model import ActorModel, CriticModel
  from paddle import fluid
  from parl.utils import logger
label_desc: Use image node_id 5 for calling the EnsembleBaseModel obj's underlying member method code with example usage: obj.pred_batch(obs) and returns: action