code: def num_labels(self) -> int:
      return int(self.y_dict["paper"].max()) + 1
  
imports: from .dataset import Dataset
  from typing import Dict, Tuple, Union
  import pandas
  import torch
  import numpy
  from sklearn.model_selection import train_test_split
  import gc
  import os
  import json
label_desc: Use image node_id 10 for calling the OGBNPapers100MDataset obj's underlying member method code with example usage: obj.num_labels() and returns: unknown