code: def to_(self, attrvals):
          
          attributes = []
          for key, value in attrvals.items():
              key = key.lower()
              attributes.append(factory(saml.Attribute,
                                        name=key,
                                        name_format=self.name_format,
                                        attribute_value=do_ava(value)))
  
          return attributes
docs: Create a list of Attribute instances.
  
          :param attrvals: A dictionary of attributes and values
          :return: A list of Attribute instances