code: def get_tag_list(index_file):
      with open(index_file) as f:
          tag_list = [tag.rstrip(os.linesep) for tag in f]
  
      return tag_list
  
file_path: neon/examples/ssd/datasets/ingest_pascalvoc.py
imports: from argparse import ArgumentParser
  from convert_xml_to_json import convert_xml_to_json
  import numpy
  import os
  import tarfile
  import ingest_utils
  from collections import OrderedDict
  from tqdm import tqdm
  from neon.util.persist import get_data_cache_or_nothing
label_desc: Use image node_id 3 for calling a global function with example usage: get_tag_list(index_file) and returns: tag_list