docstr: This is called from within the Trainer object to do any final instantiation before model training.
docstr_tok: ["This","is","called","from","within","the","Trainer","object","to","do","any","final","instantiation","before","model","training","."]
code: def prepare_for_training(self):
      """This is called from within the Trainer object to do any final instantiation before model training."""
      pass
  
imports: import math
  import os
  import warnings
  from abc import abstractmethod
  from functools import lru_cache
  from typing import List, Optional, Tuple, Union
  import torch
  from torch import nn
  from torch.nn import Module, ModuleDict
  from ludwig.api_annotations import DeveloperAPI
  from ludwig.constants import ENCODER_OUTPUT
  from ludwig.utils.strings_utils import SpecialSymbol
label_desc: Use image node_id 3 for calling the LudwigModule obj's underlying member method code with example usage: obj.prepare_for_training() without return types