Python deep getter with default

_DEFAULT_NOT_SPECIFIED = object()
def deep_getter(dotted_path, default=_DEFAULT_NOT_SPECIFIED):
  get_it = operator.attrgetter(dotted_path)
  if default is _DEFAULT_NOT_SPECIFIED:
    return get_it
  def _safe_get_it(obj):
    try:
      return get_it(obj)
    except AttributeError:
      return default
  return _safe_get_it