code: def get_args():
      parser = argparse.ArgumentParser()
      parser.add_argument(
          "--lang_dir",
          type=str,
          help="""Input and output directory.
          It should contain a file lexicon.txt.
          Generated files by this script are saved into this directory.
          """,
      )
  
      parser.add_argument(
          "--debug",
          type=str2bool,
          default=False,
          help="""True for debugging, which will generate
          a visualization of the lexicon FST.
          Caution: If your lexicon contains hundreds of thousands
          of lines, please set it to False!
          """,
      )
      parser.add_argument(
          "--token_list",
          type=str,
          default="",
      )
      parser.add_argument(
          "--sil_token",
          type=str,
          default="sil",
      )
      parser.add_argument(
          "--sil_prob",
          type=float,
          default=0.5,
      )
  
      return parser.parse_args()
  
file_path: espnet/egs2/puebla_nahuatl/st1/pyscripts/k2/prepare_lang.py
imports: import argparse
  import math
  from collections import defaultdict
  from pathlib import Path
  from typing import Any, Dict, List, Tuple
  import k2
  import torch
  from icefall.lexicon import read_lexicon, write_lexicon
  from espnet2.utils.types import str2bool
label_desc: Use image node_id 1 for calling a global function with example usage: get_args() and returns: parser