code: def val_data_creator(config, batch_size):
      return DataLoader(TcmfValDataset(config), batch_size=None)
  
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 4 for calling a global function with example usage: val_data_creator(config, batch_size) and returns: DataLoader