class_docstr: speech feat entrypoint unittest
class_docstr_tok: ["speech","feat","entrypoint","unittest"]
docstr: tear down 
docstr_tok: ["tear","down"]
code: def tearDown(self):
      """tear down"""
      if os.path.exists(self.featfile):
          os.unlink(self.featfile)
  
file_path: delta/delta/data/feat/speech_feature_test.py
imports: import os
  from pathlib import Path
  import librosa
  import numpy
  import delta.compat
  from absl import logging
  from delta.data.feat import speech_ops
  from delta.data.feat import speech_feature
  from delta import PACKAGE_ROOT_DIR
label_desc: Use image node_id 2 for calling the SpeechFeatureTest obj's underlying member method code with example usage: obj.tearDown() without return types