def lengths_and_angles(self) -> Tuple[Tuple[float, float, float], Tuple[float, float, float]]:
        """
        Returns (lattice lengths, lattice angles).
        """
        return self.lengths, self.angles
def lengths_and_angles ( self ) -> Tuple [ Tuple [ float , float , float ] , Tuple [ float , float , float ] ] : return self . lengths , self . angles
Returns (lattice lengths, lattice angles).