Steven D'Aprano wrote:
Firstly, if it raises an exception, then it means all set handling code needs to be written (e.g.):
try: len(s) except Exception: # handle universal set print "What do I do here?"
instead of the simple:
len(s)
There is a lot of floating point code in the world that will blow up if fed a Nan or an Inf value as input. Given that it is even harder for a set.universal() instance to show up by accident, I don't see that it would be a major problem if most set handling code remained "naive" about the universal set. That said, I'm still with Georg in not being convinced yet that the mathematical elegance is worth the additional complexity. Cheers, Nick. -- Nick Coghlan | ncoghlan@gmail.com | Brisbane, Australia ---------------------------------------------------------------