Traverse a dictionary recursively and save path

        Taken from:
  http://code.activestate.com/recipes/577982-recursively-walk-python-objects/

def objwalk(self, obj, path=(), memo=None):
        """Traverse a dictionary recursively and save path

        Taken from:
  http://code.activestate.com/recipes/577982-recursively-walk-python-objects/
"""

        # dual python 2/3 compatability, inspired by the "six" library
        string_types = (str, unicode) if str is bytes else (str, bytes)
        iteritems = lambda mapping: getattr(mapping, 'iteritems', mapping.items)()

        if memo is None:
            memo = set()
        iterator = None
        if isinstance(obj, Mapping):
            iterator = iteritems
        elif isinstance(obj, (Sequence, Set)) and not isinstance(obj, string_types):
            iterator = enumerate
        if iterator:
            if id(obj) not in memo:
                memo.add(id(obj))
                for path_component, value in iterator(obj):
                    for result in self.objwalk(value, path + (path_component,), memo):
                        yield result
                memo.remove(id(obj))
        else:
            yield path, obj