On Jun 25, 9:04 pm, Chris Torek <[email protected]> wrote:
> >I'm curious. Is there a way to get the number of significant digits
> >for a particular Decimal instance?
>
> Yes:
>
> def sigdig(x):
> "return the number of significant digits in x"
> return len(x.as_tuple()[1])
Great, Chris, this is (almost) exactly what I needed.
To make it work for numbers like 1200, that have four digits but only
two of them being significant, I changed your snippet to the
following:
class Empirical(Decimal) :
@property
def significance(self) :
t = self.as_tuple()
if t[2] < 0 :
return len(t[1])
else :
return len(''.join(map(str,t[1])).rstrip('0'))
>>> Empirical('1200.').significance
2
>>> Empirical('1200.0').significance
5
now it's only about overriding the numerical operators :)
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