On Wed, 27 Apr 2011, Antoine Pitrou wrote:
Isaac Morland <ijmor...@uwaterloo.ca> wrote:Python could also provide IEEE-754 equality as a function (perhaps in "math"), something like: def ieee_equal (a, b): return a == b and not isnan (a) and not isnan (b)+1 (perhaps call it math.eq()).
Alexander Belopolsky pointed out to me (thanks!) that isnan is implemented in C so my caveat about the implementation of isnan is not an issue. But then that made me realize the ieee_equal (or just "eq" if that's preferable) probably ought to be implemented in C using a floating point comparison - i.e., use the processor implementation of the comparison operation..
Isaac Morland CSCF Web Guru DC 2554C, x36650 WWW Software Specialist _______________________________________________ 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
