On my AMP server I'm using twisted.enterprise to query a postgres database and do inserts. I'd like to return whether the insert succeeded or failed as the response to the AMP responder function -- is there an established pattern for doing things like that? So basically, with the amp command: class MyInsert(amp.Command): arguments = [('an_int',amp.Integer())] response = [('succeeded',amp.Boolean())] ....on the client I do: amp_client.callRemote(MyInsert, an_int) ...on the server: @MyInsert.responder def my_insert(self, an_int): qry_def = self.dbpool.runOperation("insert into mytable the_number values (%d);" % an_int) qry_def.addCallback(self._my_insert_ok) qry_def.addErrback(self._my_insert_err) # Here's the AMP response...but I don't KNOW whether it succeeded yet! # ...but I've _got_ to return a response dict from this function or AMP gives an error! return {'succeeded':True} def _my_insert_ok(self, none_object): print "It succeeded" def _my_insert_err(self, failure_object): print "It failed with: %s" % failure_object.getErrorMessage() ~ Nathan