code: def d_from_format(self, attr):
          
          if attr["name_format"]:
              if self.name_format == attr["name_format"]:
                  try:
                      return self._fro[attr["name"].lower()]
                  except KeyError:
                      pass
          else:  # don't know the name format so try all I have
              try:
                  return self._fro[attr["name"].lower()]
              except KeyError:
                  pass
  
          return ""
docs: Find out the local name of an attribute
  
          :param attr: An Attribute dictionary
          :return: The local attribute name or "" if no mapping could be made