code: def get_data_dir(self):
      origin_file = self.maybe_download(self.data_dir, self.source_url)
      convert_file = self.maybe_convert2json(origin_file)
      euler_file = self.maybe_convert2euler(convert_file)
      return euler_file
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import shutil
  import sys
  import tf_euler
  from euler.tools.generate_euler_data import EulerGenerator
label_desc: Use image node_id 3 for calling the DataSet obj's underlying member method code with example usage: obj.get_data_dir() and returns: euler_file