class_docstr: yahoo answer data class for cls task.
code: def __init__(self, project_dir):
      super().__init__(project_dir)
      self.data_files = ["train.txt", "test.txt", "dev.txt"]
      self.config_files = ["yahoo_answer_text_cls_han.yml"]
      self.download_files = ["yahoo_answers_csv.tgz"]
  
file_path: delta/delta/data/datasets/yahoo_answer.py
imports: import wget
  import os
  import traceback
  import csv
  from absl import logging
  from delta.data.datasets.base_dataset import BaseDataSet
  from delta.utils.register import registers
  from delta.data.datasets.utils import split_train_dev
label_desc: Use image node_id 1 to create a new YahooAnswer object from inherited base classes: BaseDataSet with example: obj = YahooAnswer(project_dir)