code: def crop(self, left, right):
          
          if left + right > self.duration:
              raise ValueError('Cannot crop more data than we have')
  
          s = int(left * self.sample_rate)
          e = len(self) - int(right * self.sample_rate)
          return self[s:e]
docs: Remove given seconds from either end of time series
  
          Parameters
          ----------
          left : float
              Number of seconds of data to remove from the left of the time series.
          right : float
              Number of seconds of data to remove from the right of the time series.
  
          Returns
          -------
          cropped : pycbc.types.TimeSeries
              The reduced time series