[Python-Dev] Mixing float and Decimal -- thread reboot (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Sun Mar 21 07:58:24 CET 2010

Raymond Hettinger wrote:

On Mar 20, 2010, at 6:54 PM, Nick Coghlan wrote:

I suggest a 'linearised' numeric tower that looks like: int -> Decimal -> Fraction -> float -> complex Is that a typo? Shouldn't Decimal and float go between Fraction and complex? The abstract numeric tower is: Number Complex Real Rational Integral where both Decimal and float have operations associated with reals.

I don't actually mind either way - the pragmatic tower is about coding convenience rather than numeric purity (and mixing Fractions and Decimals in the same algorithm is somewhat nonsensical - they're designed for two completely different problem domains).

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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