code: def __repr__(self):  # pragma: no cover
      return "{}({})".format(self.__class__.__name__, len(self))
  
file_path: ogb/ogb/graphproppred/dataset.py
imports: import pandas
  import shutil, os
  import numpy
  import os.path
  from ogb.utils.url import decide_download, download_url, extract_zip
  from ogb.io.read_graph_raw import read_csv_graph_raw, read_binary_graph_raw
  import torch
label_desc: Use image node_id 6 for calling the GraphPropPredDataset obj's underlying member method code with example usage: obj.__repr__() and returns: str