code: def __post_init__(self):
      if self.output_dir is not None:
          self.output_dir = os.path.expanduser(self.output_dir)
  
imports: import json
  import logging
  import math
  import os
  import sys
  import time
  from dataclasses import asdict, dataclass, field
  from enum import Enum
  from functools import partial
  from pathlib import Path
  from typing import Callable, Optional
  import datasets
  import nltk
  import numpy
  from datasets import Dataset, load_dataset
  from tqdm import tqdm
  import evaluate
  import jax
  import jax.numpy
  import optax
  import transformers
  from filelock import FileLock
  from flax import jax_utils, traverse_util
  from flax.jax_utils import pad_shard_unpad, unreplicate
  from flax.training import train_state
  from flax.training.common_utils import get_metrics, onehot, shard, shard_prng_key
  from huggingface_hub import Repository
  from transformers import CONFIG_MAPPING, FLAX_MODEL_FOR_SEQ_TO_SEQ_CAUSAL_LM_MAPPING, AutoConfig, AutoTokenizer, FlaxAutoModelForSeq2SeqLM, HfArgumentParser, is_tensorboard_available
  from transformers.utils import get_full_repo_name, is_offline_mode, send_example_telemetry
label_desc: Use image node_id 1 for calling the TrainingArguments obj's underlying member method code with example usage: obj.__post_init__() without return types