[EMAIL PROTECTED] wrote: > Has the addition of a Universe Set object ever been suggested. Like U > = set(0), so that any object was a member of U? Maybe this gets into > some crazy Cantorian stuff since U is in U. But it seems like it would > be useful and would have a nice symmetry with emptyset:set([]), that > is: > > for any object a: > "a in set([])" returns False > "a in set(0)" returns True >
>>> class universe(object): ... def __contains__(self, thing): ... return True ... >>> U = universe() >>> 1 in U True >>> None in U True >>> U in U True >>> Of course the last eexample shows that your implementation may need to change depending on how you view Russell's paradox ... regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://holdenweb.blogspot.com Recent Ramblings http://del.icio.us/steve.holden -- http://mail.python.org/mailman/listinfo/python-list
