And slightly unrelated, but just showing how bizarre floats are: >>> x = 1e66666 >>> y = x/x >>> cmp(y, y) 0 >>> cmp(x/x, x/x) -1
Yeah object identity checks! From: python-dev-bounces+dinov=microsoft....@python.org [mailto:python-dev-bounces+dinov=microsoft....@python.org] On Behalf Of Daniel Stutzbach Sent: Tuesday, February 10, 2009 12:43 PM To: cesare.dima...@a-tono.com Cc: Python-Dev Subject: Re: [Python-Dev] Expression optimizations On Tue, Feb 10, 2009 at 2:36 PM, Cesare Di Mauro <cesare.dima...@a-tono.com> wrote: OK, so I can make assumptions only for built-in types. Yes, but even there you have to be careful of odd corner-cases, such as: >>> nan = float('nan') >>> nan < nan False >>> nan >= nan False -- Daniel Stutzbach, Ph.D. President, Stutzbach Enterprises, LLC _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
