code: def __init__(self):
      self.node_id = 0
      self.stack = []
      self.graph = nx.Graph()
      self.nodes = {}
  
file_path: ogb/examples/graphproppred/code2/py2graph.py
imports: import ast
  import networkx
  import os
  import pandas
  import numpy
label_desc: Use image node_id 1 to create a new OGB_ASTWalker object from inherited base classes: ast with example: obj = OGB_ASTWalker()