def add_user_grant(self, permission, user_id):
        acl = self.get_acl()
        acl.add_user_grant(permission, user_id)
        self.set_acl(acl)
Convenience method that provides a quick way to add a canonical user
dataset/ETHPy150Open yyuu/botornado/boto/gs/key.py/Key.add_user_grant