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

Jeffrey Yasskin jyasskin at gmail.com
Sun Jan 6 10:21:11 CET 2008

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.

-- Namasté, Jeffrey Yasskin

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