class_docstr: yahoo answer data class for cls task.
code: def to_standard_format(input_file, output_file):
      logging.info("Save file to {}".format(output_file))
  
      with open(input_file, encoding="utf-8") as csv_file, open(
          output_file, "w", encoding="utf-8"
      ) as out_file:
          csv_reader = csv.reader(csv_file)
          for row in csv_reader:
              if len(row) < 4:
                  continue
              label = row[0]
              text = " ".join(row[1:])
              out_file.write(label + "\t" + text + "\n")
  
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 3 for calling the YahooAnswer obj's underlying member method code with example usage: obj.to_standard_format(input_file, output_file) without return types