code: def _interp_gap(data, peak_loc, interp_len):
      
      start_loc = peak_loc - int(0.5 * interp_len)
      end_loc = peak_loc + int(0.5 * interp_len)
      if start_loc < 0:
          start_loc = 0
      if end_loc > len(data) - 1:
          end_loc = len(data) - 1
      fill = np.linspace(data[start_loc], data[end_loc], end_loc - start_loc)
      data[start_loc:end_loc] = fill
      return data
docs: Internal function for filling gap with linear interpolation
  
      :type data: numpy.ndarray
      :param data: data to remove peak in
      :type peak_loc: int
      :param peak_loc: peak location position
      :type interp_len: int
      :param interp_len: window to interpolate
  
      :returns: Trace works in-place
      :rtype: :class:`obspy.core.trace.Trace`