code: def __init__(self, use_cuda=False):
      self.start_model = StartModel(use_cuda=use_cuda)
      self.stage123_model = Stage123Model(use_cuda=use_cuda)
  
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 1 to create a new SubmitModel object from inherited base classes: object with example: obj = SubmitModel(use_cuda)