Message 249848 - Python tracker
Victor, there are good "theoretical" reasons for using half/even rounding in _general_ use. But this bug report isn't the place to get into them. Here it just should be enough to note that the IEEE 754 floating point standard _requires_ half/even to be the default rounding mode. Slowly but surely, all the world's non-business computer applications are moving toward that. Python is just one of 'em.