Hi, I am currently trying to use Twisted to develop my Web-based application. And I am trying to use twisted.enterprise.adbapi to handle my database connection and etc. I tried the example provide by the online docs. It work ONLY with print, without return a value for my Mako template. Can someone give a small example that lighten me how to use it? Here is some of my code. -----database.py----------- from twisted.enterprise import adbapi from twisted.internet import defer class DBModule(): connection_pool = adbapi.ConnectionPool("psycopg2", host = "localhost", database = "2juban" ,user = "2juban", password = "2juban" ) table = " " def findById(self, field, id): if field =="all": field = "*" query = """SELECT """+field+""" from """+ self.table +""" where id=""" + str(id) row = self.connection_pool.runQuery(query) return row.addCallback(self.print_data) def print_data(self, data): print data #return data ----hello.rpy------- ... from tpp.module.database import DBModule class hello(Controller): d = DBModule() d.table = 'talk_talk' t1 = d.findById('content',2) ... .. . The problem is when I just print out the value , it works ! I can saw it in my eclipse console. But if I want to get the return of the value, it's nothing rather a Deferred<>. Thanks. _________________________________________________________________ Connect to the next generation of MSN Messenger http://imagine-msn.com/messenger/launch80/default.aspx?locale=en-us&source=wlmailtagline