code: def download(self):
      import urllib
      import zipfile
  
      if self._check_exists():
          return
  
      # download files
      try:
          os.makedirs(os.path.join(self.root, self.raw_folder))
          os.makedirs(os.path.join(self.root, self.processed_folder))
      except OSError as e:
          if e.errno == errno.EEXIST:
              pass
          else:
              raise
  
      for url in self.urls:
          print("== Downloading " + url)
          data = urllib.request.urlopen(url)
          filename = url.rpartition("/")[2]
          file_path = os.path.join(self.root, self.raw_folder, filename)
          with open(file_path, "wb") as f:
              f.write(data.read())
          file_processed = os.path.join(
              self.root, self.processed_folder
          )
          print("== Unzip from " + file_path + " to " + file_processed)
          zip_ref = zipfile.ZipFile(file_path, "r")
          zip_ref.extractall(file_processed)
          zip_ref.close()
      print("Download finished.")
  
imports: import errno
  import os
  import os.path
  import numpy
  import torch
  import torch.utils.data
  import torchvision.transforms
  from PIL import Image
label_desc: Use image node_id 5 for calling the Omniglot obj's underlying member method code with example usage: obj.download() without return types