code: def __iter__(self):
      inp, out, _, _ = self.tcmf_data_loader.supply_test()
      yield inp, out
  
imports: import torch
  import torch.nn
  import torch.optim
  from torch.utils.data import DataLoader
  import torch.distributed
  from bigdl.chronos.model.tcmf.local_model import TemporalConvNet
  import ray
  import horovod.torch
label_desc: Use image node_id 2 for calling the TcmfValDataset obj's underlying member method code with example usage: obj.__iter__() without return types