class_docstr: Base class for TIMIT problems.
class_docstr_tok: ["Base","class","for","TIMIT","problems","."]
code: def example_reading_spec(self):
      data_fields = {
          "inputs": tf.VarLenFeature(tf.int64),
          "audio/sample_count": tf.FixedLenFeature((), tf.int64),
          "audio/sample_width": tf.FixedLenFeature((), tf.int64),
          "targets": tf.VarLenFeature(tf.int64),
      }
      return data_fields, None
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import text_encoder
  from tensor2tensor.layers import modalities
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the AudioTimitProblem obj's underlying member method code with example usage: obj.example_reading_spec() and returns: data_fields,  None