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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _compute_radii(self):
 """Generate RBF radii"""


        # use supplied radii if present
        radii = self._get_user_components('radii')

        # compute radii
        if (radii is None):
            centers = self.components_['centers']

            n_centers = centers.shape[0]
            max_dist = np.max(pairwise_distances(centers))
            radii = np.ones(n_centers) * max_dist/sqrt(2.0 * n_centers)

        self.components_['radii'] = radii