docstr: Returns number of the nodes in each generated graphs.
  
  Returns:
      list: List of the number of nodes.
docstr_tok: ["Returns","number","of","the","nodes","in","each","generated","graphs",".","Returns",":","list",":","List","of","the","number","of","nodes","."]
code: def num_nodes(self):
      r"""
      Returns number of the nodes in each generated graphs.
  
      Returns:
          list: List of the number of nodes.
      """
      return [gen.num_nodes for gen in self.generators]
  
imports: import copy
  import math
  import types
  import random
  import networkx
  import numpy
  import torch
  import deepsnap
  from deepsnap.graph import Graph
  from deepsnap.hetero_graph import HeteroGraph
  import pdb
  from typing import Dict, List, Union
  import warnings
label_desc: Use image node_id 3 for calling the EnsembleGenerator obj's underlying member method code with example usage: obj.num_nodes() and returns: unknown