code: def main(argv=None):
      
      parser = argparse.ArgumentParser(description="Benchmark driver")
  
      parser.add_argument("--max-records", type=int, default=100 * 1000)
      parser.add_argument("--engine", type=str, choices=("vcfpy", "pyvcf"), default="vcfpy")
      parser.add_argument("--input-vcf", type=str, required=True, help="Path to VCF file to read")
      parser.add_argument(
          "--output-vcf", type=str, required=False, help="Path to VCF file to write if given"
      )
  
      args = parser.parse_args(argv)
      if args.engine == "vcfpy":
          VCFPyRunner(args).run()
      else:
          PyVCFRunner(args).run()
docs: Main program entry point for parsing command line arguments