On Mon, Mar 2, 2015 at 10:48 PM, Chris Barker firstname.lastname@example.org wrote:
On Mon, Mar 2, 2015 at 10:39 PM, Guido van Rossum email@example.com wrote:
(*) Adding it to the decimal module would require a discussion with
Raymond Hettinger, but Decimal users can probably copy and paste the formula from the PEP.
yup -- but maybe worth putting in there while we're at it. though as Decimal is arbitrary precision, maybe it's not needed....
It's not really arbitrary precision, it's decimal *floating* point with a large but finite precision, so all the same arguments apply.
But my reasoning was more that (at least when I was last involved in the project) the decimal module tries to stick pretty close to the IEEE 754 standard (maybe nowadays a later version?) and random Python-only additions are controversial.