Against PEP 240

Roman Suzi rnd at onego.ru
Tue May 29 13:01:15 EDT 2001


On Tue, 29 May 2001, Alex Martelli wrote:

>"Oleg Broytmann" <phd at phd.fep.ru> wrote in message
>news:mailman.991147483.2093.python-list at python.org...
>    ...
>> > > > I wonder, why at all need such things?  Are there any standard
>library
>> > for
>> > > > inf-precision in current Python version?  If so, was it tested long
>    ...
>>    I don't know. The question was "is there are infinite-precision
>> arithmetics". And the answer is "yes, there is".
>
>True, I suspect Roman had badly placed the question, relying
>on context (long since snipped away:-) to avoid any possible
>misinterpretation.  As Python's longs "obviously" (to any
>Pythonista:-) provide infinite-precision INTEGRAL arithmetic,
>what Roman was asking, I'm pretty sure, is whether there was
>inf-precision on NON-INTEGRAL numbers:-).

Yes. I want to be able to do:

a = cos(Pi * 2) + sin(Pi*1.2)

with infinite precision ;-)

>Alex

Quantum computing anyone?

*

Why not to calculate floats with more precision than doubles?
(Not infinite precision, of course - but there is nothing
bad if Python will have world-class SymbolicAlgebra one day:
everything is syntactically ready for this).

So, rationale type will help. BUT NOT AS A REPLACEMENT FOR
FLOAT.

Sincerely yours, Roman Suzi
-- 
_/ Russia _/ Karelia _/ Petrozavodsk _/ rnd at onego.ru _/
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