code: def send_req(self, message):
      self.socket.send_json(message)
      result = self.socket.recv_json()
  
      return result
  
file_path: PaddleHub/paddlehub/serving/client.py
imports: import zmq
label_desc: Use image node_id 2 for calling the InferenceClient obj's underlying member method code with example usage: obj.send_req(message) and returns: result