code: def test_tcn_forecaster_import(self):
      from bigdl.chronos.forecaster.pytorch import TCNForecaster
  
      assert isinstance(TCNForecaster, LazyImport)
  
      tcn = TCNForecaster(
          input_feature_num=1,
          output_feature_num=1,
          past_seq_len=48,
          future_seq_len=5,
      )
      from bigdl.chronos.forecaster.tcn_forecaster import TCNForecaster
  
      assert not isinstance(TCNForecaster, LazyImport)
      assert isinstance(tcn, TCNForecaster)
  
file_path: BigDL/python/chronos/test/bigdl/chronos/forecaster/test_pytorch.py
imports: from unittest import TestCase
  from bigdl.chronos.utils import LazyImport
  from ..None import op_torch
label_desc: Use image node_id 3 for calling the TestChronosModelPytorch obj's underlying member method code with example usage: obj.test_tcn_forecaster_import() without return types