old_contents: #!/usr/bin/env python
  """Learn to reverse the words in a text."""
  import logging
  logging.basicConfig(
      level=logging.INFO,
      format="%(asctime)s: %(name)s: %(levelname)s: %(message)s")
  import argparse
  
  from lvsr.main import main
  
  if __name__ == "__main__":
      parser = argparse.ArgumentParser(
          "Phoneme recognition on TIMIT",
          formatter_class=argparse.ArgumentDefaultsHelpFormatter)
      parser.add_argument(
          "mode", choices=[
              "train", "test", "init_norm", "show_data", "search"],
          help="The mode to run")
      parser.add_argument(
          "save_path", default="chain",
          help="The path to save the training process.")
      parser.add_argument(
          "config_path", default=None, nargs="?",
          help="The configuration")
      parser.add_argument(
          "config_changes", default=[], nargs='*',
          help="Changes to configuration. Path, value, path, value.")
      parser.add_argument(
          "--num-batches", default=100000, type=int,
          help="Train on this many batches.")
      parser.add_argument(
          "--params", default=None, type=str,
          help="Load parameters for this file.")
      parser.add_argument(
          "--fast-start", default=False, action="store_true",
          help="Skip initial validation cost and PER computatoins.")
      parser.add_argument(
          "--part", default="valid",
          help="Data to recognize with beam search.")
      parser.add_argument(
          "--beam-size", default=10, type=int,
          help="Beam size")
      parser.add_argument(
          "--old-labels", default=False, action="store_true",
          help="Expect old labels when decoding.")
      parser.add_argument(
          "--report", default=None,
          help="Destination to save a detailed report.")
      args = parser.parse_args()
      main(args)
  
new_contents: #!/usr/bin/env python
  """Learn to reverse the words in a text."""
  import logging
  logging.basicConfig(
      level=logging.INFO,
      format="%(asctime)s: %(name)s: %(levelname)s: %(message)s")
  import argparse
  
  from lvsr.main import main
  
  
  class StoreIfNotUnderscore(argparse.Action):
  
      def __call__(self, parser, namespace, values, option_string):
          if values != '_':
              setattr(namespace, self.dest, values)
  
  
  if __name__ == "__main__":
      parser = argparse.ArgumentParser(
          "Fully neural speech recognition",
          formatter_class=argparse.ArgumentDefaultsHelpFormatter)
      parser.add_argument(
          "mode", choices=[
              "train", "test", "init_norm", "show_data", "search"],
          help="The mode to run")
      parser.add_argument(
          "save_path", default="chain",
          help="The path to save the training process.")
      parser.add_argument(
          "config_path", default=None, nargs="?",
          action=StoreIfNotUnderscore,
          help="The configuration")
      parser.add_argument(
          "config_changes", default=[], nargs='*',
          help="Changes to configuration. Path, value, path, value.")
      parser.add_argument(
          "--num-batches", default=100000, type=int,
          help="Train on this many batches.")
      parser.add_argument(
          "--params", default=None, type=str,
          help="Load parameters for this file.")
      parser.add_argument(
          "--fast-start", default=False, action="store_true",
          help="Skip initial validation cost and PER computatoins.")
      parser.add_argument(
          "--part", default="valid",
          help="Data to recognize with beam search.")
      parser.add_argument(
          "--beam-size", default=10, type=int,
          help="Beam size")
      parser.add_argument(
          "--old-labels", default=False, action="store_true",
          help="Expect old labels when decoding.")
      parser.add_argument(
          "--report", default=None,
          help="Destination to save a detailed report.")
      args = parser.parse_args()
      main(args)
  
subject: Make config_path an optional positional argument