I haven't been following this whole thread, but it sounds like you want something like PJE's RuleDispatch package.
There's a Developer Works article about it, put up very recently: http://www-128.ibm.com/developerworks/linux/library/l-cppeak2/?ca=dgr- lnxw02aScalingPEAK PJE (IIRC) based it off of LISP's system of multi-method dispatch. Instructions for installing can be found here: http://peak.telecommunity.com/ I've used this package quite a bit in the past, and have been very happy with it. It allows for dynamic type AND value based function dispatch. Jay P. -- http://mail.python.org/mailman/listinfo/python-list
