thanks very much for the hint, circuits is a very good event-driven frame work just like twisted
but currently my project is in a pretty much complex way see, I'm designing a so called "Game Server", every client has their own task execution order, see like below: 1.clientA wants to sale his armor 2.clientA wants to buy the knife 3.clientA wants to talk to npc I think for one client this sequence should be lined-up, the task should follow the 1,2,3step but there's multiple clients on this server so for multiple clients they can not wait until clientA finishing his job. if there's clientB like below: 1.clientB wants to say something to npc 2.clientB wants to attack clientC 3.clientB wants to draw his sword the whole process for the server should be like this sequence: 1.clientA wants to sale his armor 2.clientB wants to say something to npc 3.clientB wants to attack clientC 4.clientA wants to buy the knife 5.clientA wants to talk to npc 6.clientB wants to draw his sword for clientA and clientB separately their tasks are lined-up, for whole system they are concurrent and plus I don't want to block the whole task system when a single client dealing with big chunk task. I don't know if I get picture right:) any idea about my design? thanks a lot -- http://mail.python.org/mailman/listinfo/python-list