code: def save_a_vocab_file(vocab_file, vocab_list):
      """Save a Vocab file for test."""
      with open(vocab_file, "w", encoding="utf-8") as out_f:
          for vocab in vocab_list:
              out_f.write(vocab)
              out_f.write("\n")
      return vocab_file
  
file_path: delta/delta/data/datasets/utils.py
imports: import os
  import pickle
  import numpy
  from pathlib import Path
  import tempfile
  from absl import logging
  from sklearn.model_selection import train_test_split
label_desc: Use image node_id 8 for calling a global function with example usage: save_a_vocab_file(vocab_file, vocab_list) and returns: vocab_file