code: def _get_sox_encoding(encoding):
      encodings = {
          "PCM_F": "floating-point",
          "PCM_S": "signed-integer",
          "PCM_U": "unsigned-integer",
          "ULAW": "u-law",
          "ALAW": "a-law",
      }
      return encodings.get(encoding)
  
imports: import io
  import os
  from functools import partial
  import torch
  from parameterized import parameterized
  from torchaudio._backend.utils import get_save_func
  from torchaudio_unittest.common_utils import get_wav_data, load_wav, nested_params, PytorchTestCase, save_wav, skipIfNoExec, skipIfNoSox, skipIfNoSoxEncoder, sox_utils, TempDirMixin, TorchaudioTestCase
  from .common import get_enc_params, name_func
label_desc: Use image node_id 1 for calling a global function with example usage: _get_sox_encoding(encoding) and returns: encodings