code: def write_data_files(cls, dpext, out_path, d_vocab, d_label_answer):
      data_fnames = [
          ("train", "question.train.token_idx.label"),
          ("valid", "question.dev.label.token_idx.pool"),
          ("test", "question.test1.label.token_idx.pool"),
          # ("test2", "question.test2.label.token_idx.pool")
      ]
      for dtype, data_fname in data_fnames:
          data_path = os.path.join(dpext, data_fname)
          cls.create_fb_format(
              out_path, dtype, data_path, d_vocab, d_label_answer
          )
  
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 ParseInsuranceQAV1 obj's underlying member method code with example usage: obj.write_data_files(cls, dpext, out_path, d_vocab, d_label_answer) without return types