docs: def _get_pad_left_right(small, large):
      """ Compute left and right padding values.
  
      Here we use the convention that if the padding
      size is odd, we pad the odd part to the right
      and the even part to the left.
  
      Parameters
      ----------
      small : int
          Old size of original 1D array
      large : int
          New size off padded 1D array
  
      Returns
      -------
      (padleft, padright) : tuple
          The proposed padding sizes.
      """
      assert small < large, "Can only pad when new size larger than old size"
  
      padsize = large - small
      if padsize % 2 != 0:
          leftpad = (padsize - 1)/2
      else:
          leftpad = padsize/2
      rightpad = padsize-leftpad
  
      return int(leftpad), int(rightpad)