class_docstr: Class to represent some dataset: train, validation, test
docstr: Return qtty of examples in dataset
docstr_tok: ["Return","qtty","of","examples","in","dataset"]
code: def num_examples(self):
      """Return qtty of examples in dataset"""
      raise NotImplementedError
  
file_path: auptimizer/Examples/cai_eas/eas/data_providers/base_provider.py
imports: import numpy
label_desc: Use image node_id 1 for calling the DataSet obj's underlying member method code with example usage: obj.num_examples() without return types