code: def test_single_file(self):
      with TempDirectory() as temp_dir:
          file1, _ = self._write_audio_files_in_dir(temp_dir)
  
          sf = tc.load_audio(file1)
  
          self.assertEqual(len(sf), 1)
          self.assertEqual(sorted(sf.column_names()), ["audio", "path"])
  
          # Check the audio file
          audio1 = sf.filter_by([file1], "path")["audio"][0]
          self.assertEqual(audio1["sample_rate"], self.sample_rate1)
          self.assertTrue(all(audio1["data"] == self.noise1))
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from .util import TempDirectory
  from copy import copy
  import math
  from os import mkdir
  import unittest
  import pytest
  import numpy
  import sys
  import turicreate
  from turicreate.toolkits._internal_utils import _raise_error_if_not_sarray
  from turicreate.toolkits._main import ToolkitError
  from turicreate.toolkits._internal_utils import _mac_ver
label_desc: Use image node_id 7 for calling the ReadAudioTest obj's underlying member method code with example usage: obj.test_single_file() without return types