def theoretical_quantiles(self):
        """Theoretical quantiles"""
        try:
            return self.dist.ppf(self.theoretical_percentiles)
        except TypeError:
            msg = "%s requires more parameters to compute ppf".format(
                self.dist.name,
            )
            raise TypeError(msg)
        except Exception as exc:
            msg = "failed to compute the ppf of {0}".format(self.dist.name)
            raise type(exc)(msg)