code: def parse_tfrecord(self, path):
      return [
          tf.train.Example.FromString(record.numpy())
          for record in tf.data.TFRecordDataset(
              os.path.join(self.test_dir, path)
          )
      ]
  
imports: import os
  import sys
  from absl import flags
  from absl.testing import absltest
  from absl.testing import parameterized
  from ddsp import spectral_ops
  from ddsp.training.data_preparation import prepare_tfrecord_lib
  import numpy
  import scipy.io.wavfile
  import tensorflow.compat.v2
label_desc: Use image node_id 3 for calling the PrepareTFRecordBeamTest obj's underlying member method code with example usage: obj.parse_tfrecord(path) and returns: unknown