class_docstr: Apply speed purturbation to (synthetic) Tensor data
class_docstr_tok: ["Apply","speed","purturbation","to","(","synthetic",")","Tensor","data"]
code: def __len__(self):
      return len(self.signals)
  
imports: import os
  import platform
  import sys
  from concurrent.futures import ProcessPoolExecutor
  from typing import List, Tuple
  from unittest import skipIf
  import numpy
  import torch
  import torchaudio
  from torchaudio_unittest.common_utils import get_whitenoise, PytorchTestCase, save_wav, skipIfNoSox, TempDirMixin
label_desc: Use image node_id 3 for calling the RandomPerturbationTensor obj's underlying member method code with example usage: obj.__len__() and returns: len