code: def delete_attributes(self, attrs):
          
          assert(isinstance(attrs, list)), "Argument must be a list of names of keys to delete."
          self._manager.domain.delete_attributes(self.id, attrs)
          self.reload()
          return self
docs: Delete just these attributes, not the whole object.
  
          :param attrs: Attributes to save, as a list of string names
          :type attrs: list
          :return: self
          :rtype: :class:`boto.sdb.db.model.Model`