code: def init_worker(params):
      global FILTER_OBJ  # pylint: disable=global-statement
      validate_label = get_validate_label(params)
      alphabet = (
          Alphabet(params.filter_alphabet)
          if params.filter_alphabet
          else None
      )
      FILTER_OBJ = LabelFilter(
          params.normalize, alphabet, validate_label
      )
  
file_path: DeepSpeech/bin/import_cv2.py
imports: import csv
  import os
  import subprocess
  import unicodedata
  from multiprocessing import Pool
  import progressbar
  import sox
  from deepspeech_training.util.downloader import SIMPLE_BAR
  from deepspeech_training.util.importers import get_counter, get_imported_samples, get_importers_parser, get_validate_label, print_import_report
  from ds_ctcdecoder import Alphabet
label_desc: Use image node_id 1 for calling a global function with example usage: init_worker(params) without return types