Ka-Ping Yee wrote:
>
> On Sun, 9 Apr 2000, Christian Tismer wrote:
> > Here is the problem, as I see it:
> > You say if you type 3.1416, you want to get exactly this back.
> > But how should Python know that you typed it in?
> > Same in my case: I just rounded to 3 digits, but how
> > should Python know about this?
> >
> > And what do you expect when you type in 3.14160, do you want
> > the trailing zero preserved or not?
>
> It's okay for the zero to go away, because it doesn't affect
> the value of the number. (Carrying around a significant-digit
> count or error range with numbers is another issue entirely,
> and a very thorny one at that.)
>
> I think "fewest digits needed to distinguish the correct value"
> will give good and least-surprising results here. This method
> guarantees:
Hmm, I hope I understood.
Oh, wait a minute! What is the method? What is the correct value?
If I type
>>> 0.1
0.10000000000000001
>>> 0.10000000000000001
0.10000000000000001
>>>
There is only one value: The one which is in the machine.
Would you think it is ok to get 0.1 back, when you
actually *typed* 0.10000000000000001 ?
--
Christian Tismer :^) <mailto:tismer@appliedbiometrics.com>
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