code: def find_extra_keys(self):
      return list(set(self.keys()) - set(self.schema.keys()))
  
imports: from __future__ import absolute_import
  from __future__ import print_function
  from __future__ import division
  import inspect
  import importlib
  import re
label_desc: Use image node_id 12 for calling the SchemaDict obj's underlying member method code with example usage: obj.find_extra_keys() and returns: list