code: def download_glove(dest_dir):
      glove = "glove.6B.zip"
      glove_path = base.maybe_download(glove, dest_dir, GLOVE_URL)
      zip_ref = zipfile.ZipFile(glove_path, "r")
      glove_dir = os.path.join(dest_dir, "glove.6B")
      if not os.path.exists(glove_dir):
          print("Extracting %s to %s" % (glove_path, glove_dir))
          zip_ref.extractall(glove_dir)
          zip_ref.close()
  
file_path: analytics-zoo/pyzoo/zoo/examples/textclassification/news20.py
imports: import tarfile
  import zipfile
  from bigdl.dataset import base
  from bigdl.util.common import *
label_desc: Use image node_id 4 for calling a global function with example usage: download_glove(dest_dir) without return types