code: def main():
      parser = argparse.ArgumentParser(
          description="Script that converts a PTB treebank into a labeled bracketed file suitable for LM training"
      )
  
      parser.add_argument(
          "ptb_file",
          help="Where to get the original PTB format treebank",
      )
      parser.add_argument(
          "label_file", help="Where to write the labeled bracketed file"
      )
      parser.add_argument(
          "--separator",
          default="_",
          help="What separator to use in place of spaces",
      )
      parser.add_argument(
          "--no_separator",
          dest="separator",
          action="store_const",
          const=None,
          help="Don't use a separator",
      )
  
      args = parser.parse_args()
  
      treebank = tree_reader.read_treebank(args.ptb_file)
      logger.info(
          "Writing %d trees to %s", len(treebank), args.label_file
      )
  
      tree_format = (
          "{:%sL}\n" % args.separator if args.separator else "{:L}\n"
      )
      with open(args.label_file, "w", encoding="utf-8") as fout:
          for tree in tqdm(treebank):
              fout.write(tree_format.format(tree))
  
imports: import argparse
  import logging
  import sys
  from stanza.models.constituency import tree_reader
  from stanza.utils.get_tqdm import get_tqdm
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types