Hello, I have some callback function params problems. Here is a simple example. def deferDoSomeInsert(paramA, paramB): insertSQL = "..." db.runQuery(insertSQL) def deferDoSomeDelete(paramA, paramB): deleteSQL = "..." db.runQuery(deleteSQL) #these two functions are individual and basic, and then, I need compound function which first insert then delete. #so def deferCompoundFunc(paramA, paramB): return deferDoSomeInsert.addCallback(deferDoSomeDelete, paramA, paramB) here the problem comes, the first defer will return none as default so there're 3 pramas pass to the second function. Is there a common way to solve the problem like this. I mean I can still keep the separate functions as the look like now, and I can compound the basic function to do more complex action using addCallback to link them. 2009-06-09 hoooooosety