code: def __init__(self, graph_json, index_meta, output_dir, partition_num):
      self.graph_json = os.path.realpath(graph_json)
      self.index_meta = index_meta
      self.output_dir = os.path.realpath(output_dir)
      self.partition_num = partition_num
  
file_path: euler/euler/tools/generate_euler_data.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from euler.tools.json2meta import Generator
  from euler.tools.json2partdat import Converter
  from euler.tools.json2partindex import Converter
  import os
  import sys
label_desc: Use image node_id 1 to create a new EulerGenerator object from inherited base classes: object with example: obj = EulerGenerator(graph_json, index_meta, output_dir, partition_num)