class_docstr: Base class for CUB dataset.
  
      
class_docstr_tok: ["Base","class","for","CUB","dataset","."]
code: def __len__(self):
      return len(self.paths)
  
file_path: chainercv/chainercv/datasets/cub/cub_utils.py
imports: import filelock
  import numpy
  import os
  from chainer.dataset import download
  from chainercv.chainer_experimental.datasets.sliceable import GetterDataset
  from chainercv import utils
label_desc: Use image node_id 2 for calling the CUBDatasetBase obj's underlying member method code with example usage: obj.__len__() and returns: len