code: def ensemble_predict(self, obs):
      feed = {"obs": obs}
      feed = [feed]
      act = self.ensemble_predict_pe.run(
          feed=feed, fetch_list=self.ensemble_predict_output
      )[0]
      return act
  
file_path: PARL/examples/NeurIPS2018-AI-for-Prosthetics-Challenge/opensim_agent.py
imports: import numpy
  import re
  import parl
  from parl import layers
  from paddle import fluid
  from paddle.fluid.executor import _fetch_var
  from parl.utils import logger
label_desc: Use image node_id 4 for calling the OpenSimAgent obj's underlying member method code with example usage: obj.ensemble_predict(obs) and returns: act