class_docstr: :param int sampling_rate: Sampling rate of input audio.
  :param float duration: Max shifting segment (in second)
  :param str direction: Shifting segment to left, right or one of them. Value can be 'left', 'right' or 'random'
  :param str name: Name of this augmenter
  
  >>> import nlpaug.augmenter.audio as naa
  >>> aug = naa.ShiftAug(sampling_rate=44010)
code: def _get_aug_shift(self):
      aug_shift = int(self.sampling_rate * self.duration)
      if self.direction == "right":
          return -aug_shift
      elif self.direction == "random":
          direction = self.sample(4) - 1
          if direction == 1:
              return -aug_shift
  
      return aug_shift
  
file_path: nlpaug/nlpaug/augmenter/audio/shift.py
imports: from nlpaug.augmenter.audio import AudioAugmenter
  import nlpaug.model.audio
  from nlpaug.util import Action, WarningMessage
label_desc: Use image node_id 2 for calling the ShiftAug obj's underlying member method code with example usage: obj._get_aug_shift() and returns: aug_shift, unknown, unknown