code: def main() -> None:
      parser = argparse.ArgumentParser(
          description="Format csv files to have 3 lines of space between each line to prevent merge conflicts.",
          fromfile_prefix_chars="@",
      )
      parser.add_argument(
          "--verbose",
          action="store_true",
          help="verbose logging",
      )
      parser.add_argument(
          "filenames",
          nargs="+",
          help="paths to lint",
      )
      args = parser.parse_args()
  
      logging.basicConfig(
          format="<%(processName)s:%(levelname)s> %(message)s",
          level=logging.NOTSET
          if args.verbose
          else logging.DEBUG
          if len(args.filenames) < 1000
          else logging.INFO,
          stream=sys.stderr,
      )
  
      with concurrent.futures.ProcessPoolExecutor(
          max_workers=os.cpu_count(),
      ) as executor:
          futures = {
              executor.submit(check_file, x): x for x in args.filenames
          }
          for future in concurrent.futures.as_completed(futures):
              try:
                  for lint_message in future.result():
                      print(
                          json.dumps(lint_message._asdict()), flush=True
                      )
              except Exception:
                  logging.critical('Failed at "%s".', futures[future])
                  raise
  
file_path: pytorch/tools/linter/adapters/no_merge_conflict_csv_linter.py
imports: import argparse
  import concurrent.futures
  import json
  import logging
  import os
  import sys
  from enum import Enum
  from typing import Any, List, NamedTuple, Optional
label_desc: Use image node_id 3 for calling a global function with example usage: main() without return types