[Twisted-Python] Documentation Question

Being new to twisted I may be lacking a clue, but finding the proper arguments to twisted.application.internet.UDPServer() was a major pain in the butt. Only by looking at the code could I find all the valid arguments and that took a lot of tracing because the valid arguments are determined by listenudp() it seems. Is their an easier way or is it always frustrating to determine the acceptable arguments to an init function? Thanks, Steve