code: def unzip_data(download_dir, data_zip):
      data_dir = download_dir + "insuranceQA-master/V2/"
      if not os.path.exists(data_dir):
          print("extracting %s to %s" % (download_dir, data_dir))
          from zipfile import ZipFile
  
          with ZipFile(data_zip, "r") as zipObj:
              zipObj.extractall(download_dir)
      return data_dir
  
file_path: singa/examples/qabot/qabot_data.py
imports: import numpy
  import random
  import os
  import urllib
label_desc: Use image node_id 2 for calling a global function with example usage: unzip_data(download_dir, data_zip) and returns: data_dir