code: def _download_multiprocess_single(url, path, dest_fname):
      """
      Helper function to download an individual item.
  
      Unlike download() above, does not deal with downloading chunks of a big
      file, does not support retries (and does not fail if retries are exhausted).
  
      :param url: URL to download from
      :param path: directory to save in
      :param dest_fname: destination file name of image
      :return tuple (dest_fname, http status)
      """
  
      status = None
      error_msg = None
      try:
          # 'User-Agent' header may need to be specified
          headers = {}
  
          # Use smaller timeout to skip errors, but can result in failed downloads
          response = requests.get(
              url,
              stream=False,
              timeout=10,
              allow_redirects=True,
              headers=headers,
          )
      except Exception as e:
          # Likely a timeout during fetching but had an error in requests.get()
          status = 500
          error_msg = (
              "[Exception during download during fetching] " + str(e)
          )
          return dest_fname, status, error_msg
  
      if response.ok:
          try:
              with PathManager.open(
                  os.path.join(path, dest_fname), "wb+"
              ) as out_file:
                  # Some sites respond with gzip transport encoding
                  response.raw.decode_content = True
                  out_file.write(response.content)
              status = 200
          except Exception as e:
              # Likely a timeout during download or decoding
              status = 500
              error_msg = (
                  "[Exception during decoding or writing] " + str(e)
              )
      else:
          # We get here if there is an HTML error page (i.e. a page saying "404
          # not found" or anything else)
          status = response.status_code
          error_msg = "[Response not OK] Response: %s" % response
  
      return dest_fname, status, error_msg
  
imports: import importlib
  import json
  import time
  import datetime
  import os
  import requests
  import shutil
  import hashlib
  import tqdm
  import gzip
  import math
  import contextlib
  import parlai.utils.logging
  from parlai.utils.io import PathManager
label_desc: Use image node_id 17 for calling a global function with example usage: _download_multiprocess_single(url, path, dest_fname) and returns: dest_fname,  status,  error_msg, dest_fname,  status,  error_msg