From: Tim Delaney

I think we probably want a supplemental PEP for upgrading the `math` module plus appropriate builtins (like round) to handle Decimal. A quick scan through the docs reveals

While I'm sure the numerical properties are iffy, just how bad is using binary FP as an intermediate when calculating transcendental functions for Decimal values? I'm thinking of something like d = Decimal(...) f = math.sin(float(d)) # Now convert back using exact float->Decimal, followed by # context-respecting "+" operation result = +Decimal.from_float(f) I suspect that this is adequate for "casual" users. And I'm not at all sure that the target audience for a Decimal type really cares about transcendental functions... (I think that boils down to claiming YAGNI, at least in the first instance). Paul. __________________________________________________________________________ This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Atos Origin group liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted. __________________________________________________________________________