class_docstr: base class for speech task
docstr: estimator input_fn
docstr_tok: ["estimator","input_fn"]
code: def input_fn(self, mode, batch_size, num_epoch=None):
      """estimator input_fn"""
      return data_utils.input_fn(
          self.dataset, mode, batch_size, num_epoch
      )
  
file_path: delta/delta/data/task/base_speech_task.py
imports: from delta import utils
  from delta.data import utils
  from delta.data.task.base_task import WavSpeechTask
label_desc: Use image node_id 3 for calling the SpeechTask obj's underlying member method code with example usage: obj.input_fn(mode, batch_size, num_epoch) and returns: data_utils