Hello! I think it's a strange behavior: Python 3.1a0 (py3k:67851, Dec 19 2008, 16:50:32) [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2 Type "help", "copyright", "credits" or "license" for more information.
hash(range(10)) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: unhashable type: 'range' dir(range(10)) ['__class__', '__delattr__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__reversed__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__'] hash(range(10)) -1211318616 hash(range(1000)) -1211318472
-- Dmitry Vasiliev (dima at hlabs.spb.ru) http://hlabs.spb.ru