code: def __getitem__(self, i):
      return self.graphs[i], self.labels[i]
  
file_path: dgl/tutorials/blitz/6_load_data.py
imports: import urllib.request
  import pandas
  import os
  import dgl
  import torch
  from dgl.data import DGLDataset
label_desc: Use image node_id 3 for calling the SyntheticDataset obj's underlying member method code with example usage: obj.__getitem__(i) and returns: self,  self