code: def get_seq_len(self, seq_len):
      return seq_len.to(dtype=torch.int) // self.hop_length + 1
  
imports: import nose_utils
  import nvidia.dali.fn
  from nvidia.dali import pipeline_def
  import nvidia.dali.types
  from test_utils import get_files, to_array
  import numpy
  import librosa
  import torch
  import math
  import random
  import os
  from nose.tools import nottest
label_desc: Use image node_id 3 for calling the FilterbankFeatures obj's underlying member method code with example usage: obj.get_seq_len(seq_len) and returns: unknown