sessions_ndb.py 文件源码

def get_by_sid(cls, sid):
        """Returns a ``Session`` instance by session id.

        :param sid:
            A session id.
        :returns:
            An existing ``Session`` entity.
        """
        data = memcache.get(sid)
        if not data:
            session = model.Key(cls, sid).get()
            if session:
                data = session.data
                memcache.set(sid, data)

        return data