On 4 Dec 2006 20:18:22 -0800, Linan <tali.wang at gmail.com> wrote: > 3, If not, where to get the real one(s)? After reading Calvin's mail, you may want to see http://twistedmatrix.com/ . It's an assynchronous library built around the concept of deferreds (think of callbacks). You may like it =). Cya, -- Felipe.