Returns a sequence of tuple pairs with the first item being a Rabi
        angle and the second item being the corresponding excited state
        probability.

def data(self) -> Sequence[Tuple[float, float]]:
        """Returns a sequence of tuple pairs with the first item being a Rabi
        angle and the second item being the corresponding excited state
        probability.
        """
        return [(angle, prob) for angle, prob in zip(self._rabi_angles,
                                                     self._excited_state_probs)]