How to use the rtree.index.RT_Star function in Rtree

def _PrepareRtree(shape_list):
  p = rindex.Property()
  p.leaf_capacity = 1000
  p.variant = rindex.RT_Star
  p.fill_factor = 0.02

  def Points():
    for shape_id in range(1, len(shape_list)):
      shape = shape_list[shape_id]
      for box in shape.BoxesForRtree(shape_id):
        yield box

  rtree = rindex.Index(Points(), properties=p)
  return rtree

def r_tree(self):
        if not hasattr(self, '_r_tree'):

            # define properties
            p = r_treeIndex.Property()
            p.dimension = self.dim()
            p.variant = r_treeIndex.RT_Star
            index = np.concatenate((range(self.dim()), range(self.dim())))

            # Generator provides required point format
            def gen():
                for id, coord in self:
                    yield (id, coord[index], id)
            self._r_tree = Rtree(gen(), properties=p)

        return self._r_tree

def prepare_rtree(dot_list):
  p = rindex.Property()
  p.leaf_capacity = 1000
  p.variant = rindex.RT_Star
  p.fill_factor = 0.02
  
  def points():
    for index in range(len(dot_list)):
      dot = dot_list[index]
      yield (index, dot_to_box(dot), None)

  rtree = rindex.Index(points(), properties=p)
  return rtree