def _conditional_time_to_event_(self):
        age = self.survival_function_.index.values[:, None]
        columns = ['%s - Conditional time remaining to event' % self._label]
        return pd.DataFrame(qth_survival_times(self.survival_function_[self._label] * 0.5, self.survival_function_).T.sort(ascending=False).values,
                            index=self.survival_function_.index,
                            columns=columns) - age
If the user selected a device, ask the device to generate a challenge;
dataset/ETHPy150Open CamDavidsonPilon/lifelines/lifelines/fitters/__init__.py/UnivariateFitter._conditional_time_to_event_--crossover with--dataset/ETHPy150Open Bouke/django-two-factor-auth/two_factor/views/core.py/LoginView.render