[Python-Dev] Rounding Decimals (original) (raw)

Jeffrey Yasskin jyasskin at gmail.com
Mon Jan 7 00:26:28 CET 2008

On Jan 6, 2008 1:21 AM, Jeffrey Yasskin <jyasskin at gmail.com> wrote:

On Jan 5, 2008 7:11 PM, Raymond Hettinger <python at rcn.com> wrote: > > I think pep 3141's round(x, ndigits) does (1). The only thing it > > doesn't support yet is specifying the rounding mode. Perhaps the pep > > should say that round() passes any extra named arguments on to the > > round() method so that users can specify a rounding mode for types > > that support it? > > That would clutter the interface. Just specify a universal rounding mode for round and have Decimal's implementation of that > method comply.

Yeah, thinking about this more, a .round() method on Context objects seems like a better way to handle the part of Mark's request that the round builtin doesn't cover. Of course, there may be even better alternatives that I haven't thought of. I'll post a patch to http://bugs.python.org/issue1623 tomorrow so we have something concrete to talk about.

The new patch is posted: http://bugs.python.org/file9080/decimal-3141.patch I'll implement Context.round() in a separate patch. Comment away. :)

-- Namasté, Jeffrey Yasskin

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