class_docstr: Base DataModule.
docstr: Use this method to do things that might write to disk or that need to be done only from a single GPU in distributed settings (so don't set state `self.x = y`).
code: def prepare_data(self):
      """
      Use this method to do things that might write to disk or that need to be done only from a single GPU in distributed settings (so don't set state `self.x = y`).
      """
      pass
  
file_path: DeepKE/src/deepke/relation_extraction/few_shot/dataset/base_data_module.py
imports: from torch.utils.data import DataLoader
  from torch import nn
label_desc: Use image node_id 4 for calling the BaseDataModule obj's underlying member method code with example usage: obj.prepare_data() without return types