old_contents: __version__ = '0.0.3.1'
  VERSION = __version__
  
  from . import time_frequency
  from . import backend
  from . import backend_keras
  
  from . import augmentation
  from . import filterbank
  from . import utils
  
  from keras import backend as K
  
  if K.backend() == 'theano':
      try:
          from theano.tensor import fft
          from . import stft
      except:
          print('Update theano to 0.9 to use stft.')
  
new_contents: __version__ = '0.0.3.1'
  VERSION = __version__
  
  from . import time_frequency
  from . import backend
  from . import backend_keras
  
  from . import augmentation
  from . import filterbank
  from . import utils
  from . import datasets
  
  from keras import backend as K
  
  if K.backend() == 'theano':
      try:
          from theano.tensor import fft
          from . import stft
      except:
          print('Update theano to 0.9 to use stft.')
  
subject: add dataset module in init