docstr: MP3 file without extension can be loaded
  
  Originally, we added `format` argument for this case, but now we use FFmpeg
  for MP3 decoding, which works even without `format` argument.
  https://github.com/pytorch/audio/issues/1040
  
  The file was generated with the following command
      ffmpeg -f lavfi -i "sine=frequency=1000:duration=5" -ar 16000 -f mp3 test_noext
docstr_tok: ["MP3","file","without","extension","can","be","loaded","Originally",",","we","added","`","format","`","argument","for","this","case",",","but","now","we","use","FFmpeg","for","MP3","decoding",",","which","works","even","without","`","format","`","argument",".","https",":","\/\/github.com\/pytorch\/audio\/issues\/1040","The","file","was","generated","with","the","following","command","ffmpeg","-f","lavfi","-i","``","sine=frequency=1000",":","duration=5","''","-ar","16000","-f","mp3","test_noext"]
code: def test_mp3(self):
      """MP3 file without extension can be loaded
  
      Originally, we added `format` argument for this case, but now we use FFmpeg
      for MP3 decoding, which works even without `format` argument.
      https://github.com/pytorch/audio/issues/1040
  
      The file was generated with the following command
          ffmpeg -f lavfi -i "sine=frequency=1000:duration=5" -ar 16000 -f mp3 test_noext
      """
      path = get_asset_path("mp3_without_ext")
      _, sr = self._load(path)
      assert sr == 16000
  
      with open(path, "rb") as fileobj:
          _, sr = self._load(fileobj)
      assert sr == 16000
  
imports: import io
  import itertools
  import pathlib
  import tarfile
  from functools import partial
  from parameterized import parameterized
  from torchaudio._backend.ffmpeg import _parse_save_args
  from torchaudio._backend.utils import get_load_func
  from torchaudio._internal import module_utils
  from torchaudio_unittest.backend.dispatcher.sox.common import name_func
  from torchaudio_unittest.common_utils import disabledInCI, get_asset_path, get_wav_data, HttpServerMixin, load_wav, PytorchTestCase, save_wav, skipIfNoExec, skipIfNoFFmpeg, skipIfNoModule, sox_utils, TempDirMixin
  from .save_test import _convert_audio_file
label_desc: Use image node_id 1 for calling the TestLoadWithoutExtension obj's underlying member method code with example usage: obj.test_mp3() without return types