code: def sample(self, obs):
      obs = paddle.to_tensor(obs.reshape(1, -1), dtype="float32")
      action, _ = self.alg.sample(obs)
      action_numpy = action.cpu().numpy()[0]
      return action_numpy
  
file_path: PARL/examples/Baselines/GridDispatch_competition/paddle/grid_agent.py
imports: import parl
  import paddle
  import numpy
label_desc: Use image node_id 3 for calling the GridAgent obj's underlying member method code with example usage: obj.sample(obs) and returns: action_numpy