class_docstr: Converts integer node ID's to human readable labels.
class_docstr_tok: ["Converts","integer","node","ID","'s","to","human","readable","labels","."]
code: def id_to_string(self, node_id):
      if node_id not in self.node_lookup:
          return ""
      return self.node_lookup[node_id]
  
imports: import re
  import os.path
  import collections
  import numpy
  import tensorflow
  from tensorflow.core.framework import graph_pb2
  import tvm
  from tvm.contrib.download import download_testdata
label_desc: Use image node_id 3 for calling the NodeLookup obj's underlying member method code with example usage: obj.id_to_string(node_id) and returns: self, str