code: def get_parser():
      parser = argparse.ArgumentParser(
          description="evaluate permutation-free error"
      )
      parser.add_argument(
          "--num-spkrs",
          type=int,
          default=2,
          help="number of mixed speakers.",
      )
      parser.add_argument(
          "--results",
          type=str,
          nargs="+",
          help="the scores between references and hypotheses, "
          "in ascending order of references (1st) and hypotheses (2nd), "
          "e.g. [r1h1, r1h2, r2h1, r2h2] in 2-speaker-mix case.",
      )
      parser.add_argument(
          "--results-dir",
          type=str,
          help="the score dir. ",
      )
      return parser
  
file_path: espnet/egs2/ru_open_stt/asr1/pyscripts/utils/eval_perm_free_error.py
imports: import argparse
  import codecs
  import re
  import sys
  from collections import OrderedDict
  from pathlib import Path
  from typing import List
  import numpy
  from scipy.optimize import linear_sum_assignment
label_desc: Use image node_id 1 for calling a global function with example usage: get_parser() and returns: parser