class_docstr: Tracks nodes and edges of a directed graph and supports basic operations on them.
class_docstr_tok: ["Tracks","nodes","and","edges","of","a","directed","graph","and","supports","basic","operations","on","them","."]
code: def __getitem__(self, key):
      if isinstance(key, list):
          return [self.nodes.get(k) for k in key]
      else:
          return self.nodes.get(key)
  
imports: from __future__ import absolute_import, division, print_function
  import os
  import re
  from random import getrandbits
  import inspect
  import numpy
  import html
label_desc: Use image node_id 9 for calling the Graph obj's underlying member method code with example usage: obj.__getitem__(key) and returns: unknown, self