'Save just these few attributes, not the whole object
:param attrs: Attributes to save, key->value dict
:type attrs: dict
:return: self
:rtype: :class:`boto.sdb.db.model.Model`'

def put_attributes(self, attrs):

    assert isinstance(attrs, dict), 'Argument    must    be    a    dict    of    key->values    to    save'
    for prop_name in attrs:
        value = attrs[prop_name]
        prop = self.find_property(prop_name)
        assert prop, ('Property    not    found:    %s' % prop_name)
        self._manager.set_property(prop, self, prop_name, value)
    self.reload()
    return self
