code: def read_gz(cls, filename):
      f = gzip.open(filename, "rb")
      return [x.decode("utf-8") for x in f.readlines()]
  
imports: from typing import Optional
  import gzip
  import os
  from parlai.core.build_data import DownloadableFile
  from parlai.utils.io import PathManager
  import parlai.core.build_data
label_desc: Use image node_id 1 for calling the ParseInsuranceQA obj's underlying member method code with example usage: obj.read_gz(cls, filename) and returns: unknown