code: def main(argv: Optional[List[str]] = None) -> None:
      """
      Handle command line arguments and get things started.
  
      Parameters
      ----------
      argv : Optional[List[str]], default=None
          List of arguments, as if specified on the command-line.
          If ``None``, ``sys.argv[1:]`` is used instead.
      """
      # Get command line arguments
      parser = argparse.ArgumentParser(
          description="Creates an experiment summary TSV file from a list of "
          "JSON files generated by run_experiment.",
          formatter_class=argparse.ArgumentDefaultsHelpFormatter,
          conflict_handler="resolve",
      )
      parser.add_argument(
          "summary_file", help="TSV file to store summary of results."
      )
      parser.add_argument(
          "json_file",
          help="JSON results file generated by run_experiment.",
          nargs="+",
      )
      parser.add_argument(
          "-a",
          "--ablation",
          action="store_true",
          default=False,
          help="The results files are from an ablation run.",
      )
      parser.add_argument(
          "--version",
          action="version",
          version=f"%(prog)s {__version__}",
      )
      args = parser.parse_args(argv)
  
      # Make warnings from built-in warnings module get formatted more nicely
      logging.captureWarnings(True)
      logging.basicConfig(
          format="%(asctime)s - %(name)s - %(levelname)s - "
          "%(message)s"
      )
  
      with open(args.summary_file, "w") as output_file:
          _write_summary_file(
              args.json_file, output_file, ablation=int(args.ablation)
          )
  
imports: import argparse
  import logging
  from typing import List, Optional
  from skll.experiments.output import _write_summary_file
  from skll.version import __version__
label_desc: Use image node_id 1 for calling a global function with example usage: main(argv) without return types