code: def _check_percentile(self, q):
          
  
          msg = ("percentiles should all be in the interval [0, 1]. "
                 "Try {0} instead.")
          q = np.asarray(q)
          if q.ndim == 0:
              if not 0 <= q <= 1:
                  raise ValueError(msg.format(q / 100.0))
          else:
              if not all(0 <= qs <= 1 for qs in q):
                  raise ValueError(msg.format(q / 100.0))
          return q
docs: Validate percentiles (used by describe and quantile).