code: def get_args():
      parser = argparse.ArgumentParser()
      parser.add_argument(
          "--lang_dir",
          type=str,
          help="""Lang directory.
          """,
      )
      parser.add_argument(
          "--graph_dir",
          type=str,
          help="""Graph directory.
          """,
      )
      parser.add_argument(
          "--ngram_num",
          type=int,
          default=4,
          help="""Max order in language model.
          """,
      )
  
      return parser.parse_args()
  
file_path: espnet/egs2/ruslan/tts1/pyscripts/k2/compile_hlg.py
imports: import argparse
  import logging
  from pathlib import Path
  import k2
  import torch
  from icefall.lexicon import Lexicon
label_desc: Use image node_id 1 for calling a global function with example usage: get_args() and returns: parser