text: 
  import lbann
  import os.path as osp
  
  data_dir = osp.dirname(osp.realpath(__file__))
  
  
  def make_data_reader(classname,
                       sample='get_sample_func',
                       num_samples='num_samples_func',
                       sample_dims='sample_dims_func',
                       validation_percent=0.1):
      reader = lbann.reader_pb2.DataReader()
      _reader = reader.reader.add()
      _reader.name = 'python'
      _reader.role = 'train'
      _reader.shuffle = True
      _reader.percent_of_data_to_use = 1.0
      _reader.validation_percent = validation_percent
      _reader.python.module = classname
      _reader.python.module_dir = data_dir
      _reader.python.sample_function = sample
      _reader.python.num_samples_function = num_samples
      _reader.python.sample_dims_function = sample_dims
      return reader
  