code: def __init__(self, *args, **kwargs) -> None:
      super().__init__(*args, **kwargs)
      self.loss_fn = loss.L1Loss()
  
imports: from typing import Optional, Type
  import mxnet
  from mxnet.gluon import loss, nn
  from gluonts.core.component import validated
  from gluonts.mx import Tensor
  from gluonts.mx.block.scaler import MeanScaler, NOPScaler
label_desc: Use image node_id 1 to create a new LSTNetTrain object from inherited base classes: LSTNetBase with example: obj = LSTNetTrain()