kers,
                                 initializer=init_globals,
                                 initargs=(model, qsteps, NSTR)) as executor:
            seeds = [seed for _ in range(calibration_num)]
            results = list(tqdm(executor.map(task, seeds),
                            total=calibration_num))


        lower_ = np.array([x[0] for x in results])
        veritas_ = np.array([x[1] for x in results])
        
        self.veritas_model[&#39;calibration_lower&#39;]=lower_
        self.veritas_