code: def __getitem__(self, index):
      assert index < len(self.gs)
      return self.gs[index]
  
file_path: dgl/examples/pytorch/hilander/dataset/dataset.py
imports: import pickle
  import numpy
  import torch
  from utils import build_knns, build_next_level, decode, density_estimation, fast_knns2spmat, knns2ordered_nbrs, l2norm, row_normalize, sparse_mx_to_indices_values
  import dgl
label_desc: Use image node_id 3 for calling the LanderDataset obj's underlying member method code with example usage: obj.__getitem__(index) and returns: self