How to use the fastprogress.fastprogress.ProgressBar function in fastprogress

grad = nan_to_num(-1.0 * neg_grad)
            grad = grad.astype(np.float64)
        else:
            self.previous_x = x
            grad = None

        if self.n_eval % 10 == 0:
            self.update_progress_desc(neg_value, grad)

        if self.n_eval > self.maxeval:
            self.update_progress_desc(neg_value, grad)
            raise StopIteration

        self.n_eval += 1
        if self.progressbar:
            assert isinstance(self.progress, ProgressBar)
            self.progress.update_bar(self.n_eval)

        if self.use_gradient:
            return value, grad
        else:
            return value