code: def lag_avgs(self):
          '''
          same data as expo_avgs, but with keys as the average age
          of the data -- assuming evenly spaced data points -- rather
          than decay rates
          '''
          if not self.interval:
              return
          interval = self.interval.mean
          return dict([(interval/alpha, val) 
              for alpha, val in self.get_expo_avgs().items()]f lag_avgs(self):
          '''
          same data as expo_avgs, but with keys as the average age
          of the data -- assuming evenly spaced data points -- rather
          than decay rates
          '''
          if not self.interval:
              return
          interval = self.interval.mean
          return dict([(interval/alpha, val) 
              for alpha, val in self.get_expo_avgs().items()])
docs: same data as expo_avgs, but with keys as the average age
          of the data -- assuming evenly spaced data points -- rather
          than decay rates