Does anybody have any *other* comments on the proposed sets module besides convoluted suggestions on the sorted representation? :-) Here's the source code for your web perusal: http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/python/nondist/sandbox/sets/set.py?rev=HEAD&content-type=text/vnd.viewcvs-markup --Guido van Rossum (home page: http://www.python.org/~guido/)