class_docstr: A vertex for a lineage graph.
class_docstr_tok: ["A","vertex","for","a","lineage","graph","."]
docstr: Define string representation of ``Vertex``.
  
  Format:
      {
          'arn': 'string',
          'lineage_entity': 'string',
          'lineage_source': 'string',
          '_session': <sagemaker.session.Session object>
      }
docstr_tok: ["Define","string","representation","of","``","Vertex","``",".","Format",":","{","'arn","'",":","'string","'",",","'lineage_entity","'",":","'string","'",",","'lineage_source","'",":","'string","'",",","'_session","'",":","<","sagemaker.session.Session","object",">","}"]
code: def __str__(self):
      """Define string representation of ``Vertex``.
  
      Format:
          {
              'arn': 'string',
              'lineage_entity': 'string',
              'lineage_source': 'string',
              '_session': <sagemaker.session.Session object>
          }
  
      """
      return str(self.__dict__)
  
imports: from __future__ import absolute_import
  from datetime import datetime
  from enum import Enum
  from typing import Any, Optional, Union, List, Dict
  from json import dumps
  from re import sub, search
  from sagemaker.utils import get_module
  from sagemaker.lineage._utils import get_resource_name_from_arn
label_desc: Use image node_id 4 for calling the Vertex obj's underlying member method code with example usage: obj.__str__() and returns: str