class_docstr: Abstract class for cifar readers
class_docstr_tok: ["Abstract","class","for","cifar","readers"]
code: def n_classes(self):
      return self._n_classes
  
imports: import tempfile
  import os
  import pickle
  import random
  import numpy
  from ..data_providers.base_provider import ImagesDataSet, DataProvider
  from ..data_providers.downloader import download_data_url
label_desc: Use image node_id 5 for calling the CifarDataProvider obj's underlying member method code with example usage: obj.n_classes() and returns: self