scipy.spatial
scipy.spatial.Delaunay.convex_hull
scipy.spatial.Delaunay.add_points
Delaunay.
vertex_neighbor_vertices
Neighboring vertices of vertices.
Tuple of two ndarrays of int: (indices, indptr). The indices of neighboring vertices of vertex k are indptr[indices[k]:indices[k+1]].
indptr[indices[k]:indices[k+1]]