code: def main(args):
      """Run deocding."""
      parser = get_parser()
      args = parser.parse_args(args)
  
      # logging info
      if args.verbose > 0:
          logging.basicConfig(
              level=logging.INFO,
              format="%(asctime)s (%(module)s:%(lineno)d) %(levelname)s: %(message)s",
          )
      else:
          logging.basicConfig(
              level=logging.WARN,
              format="%(asctime)s (%(module)s:%(lineno)d) %(levelname)s: %(message)s",
          )
          logging.warning("Skip DEBUG/INFO messages")
  
      # check CUDA_VISIBLE_DEVICES
      if args.ngpu > 0:
          if (
              "clsp.jhu.edu"
              in subprocess.check_output(["hostname", "-f"]).decode()
          ):
              cvd = (
                  subprocess.check_output(
                      ["/usr/local/bin/free-gpu", "-n", str(args.ngpu)]
                  )
                  .decode()
                  .strip()
              )
              logging.info("CLSP: use gpu" + cvd)
              os.environ["CUDA_VISIBLE_DEVICES"] = cvd
  
          cvd = os.environ.get("CUDA_VISIBLE_DEVICES")
          if cvd is None:
              logging.warning("CUDA_VISIBLE_DEVICES is not set.")
          elif args.ngpu != len(cvd.split(",")):
              logging.error(
                  "#gpus is not matched with CUDA_VISIBLE_DEVICES."
              )
              sys.exit(1)
  
      # display PYTHONPATH
      logging.info(
          "python path = " + os.environ.get("PYTHONPATH", "(None)")
      )
  
      # extract
      logging.info("backend = " + args.backend)
      if args.backend == "pytorch":
          from espnet.vc.pytorch_backend.vc import decode
  
          decode(args)
      else:
          raise NotImplementedError("Only pytorch is supported.")
  
imports: import logging
  import os
  import subprocess
  import sys
  import configargparse
  from espnet.utils.cli_utils import strtobool
label_desc: Use image node_id 2 for calling a global function with example usage: main(args) without return types