Daniel Stutzbach <dan...@stutzbachenterprises.com> added the comment:
I don't think the compare is actually masking an exception. The set type defines a tp_richcompare routine that gets called when comparing them as members of a tuple, but the set type also defines a tp_compare routine that does nothing but raise an exception. Another side effect is that sets are comparable using < etc., but not with cmp(): >>> s0 = frozenset(['testing 0']) >>> s1 = frozenset(['testing 1']) >>> s0 < s1 False >>> cmp(s0, s1) Traceback (most recent call last): File "<stdin>", line 1, in ? TypeError: cannot compare sets using cmp() cmp() is gone in 3.0.1 so I've removed Python 3.0 from the versions. I'm not sure why tp_compare and tp_richcompare work differently. Maybe Raymond could shed some light? ---------- nosy: +rhettinger, stutzbach versions: +Python 2.7 -Python 3.0 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue3829> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
