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Sun Mar 21 07:58:24 CET 2010 · https://mail.python.org/pipermail/python-dev/2010-March/098642.html

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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[Python-Dev] Mixing float and Decimal -- thread reboot