code: def value_predict(self, obs):
      feed = {"obs": obs}
      value = self.fluid_executor.run(
          self.value_predict_program,
          feed=feed,
          fetch_list=self.value_predict_output,
      )[0]
      return value
  
file_path: PARL/benchmark/fluid/PPO/mujoco_agent.py
imports: import numpy
  import parl
  from parl import layers
  from paddle import fluid
  from parl.utils import logger
label_desc: Use image node_id 5 for calling the MujocoAgent obj's underlying member method code with example usage: obj.value_predict(obs) and returns: value