code: def main():
      from . import arguments
  
      params = argparse.ArgumentParser(
          description="CLI to build source and target vocab(s)."
      )
      arguments.add_build_vocab_args(params)
      arguments.add_logging_args(params)
      args = params.parse_args()
      prepare_vocab(args)
  
imports: import argparse
  import json
  import logging
  import os
  from collections import Counter
  from itertools import chain, islice
  from typing import Dict, Iterable, List, Optional, Tuple, Callable
  from sockeye.log import setup_main_logger
  from .None import constants
  from .None import utils
label_desc: Use image node_id 20 for calling a global function with example usage: main() without return types