insert thousands separators
Gerhard Häring
gh at ghaering.de
Mon Jun 16 10:00:42 EDT 2003
Nick Vargish wrote:
> ps. Looking at the library reference, it's not clear if there's an easy
> way to extract the fractional portion of a float without hitting the
> Standard Floating Point Problem:
>
>>>>v = 2312.3123123
>>>>v1 = int(v)
>>>>v2 = v - v1
>>>>v2
>
> 0.31231230000003052
If you need that, then a float is probably not the right data type.
There are several implementations of arbitrary precision numbers out there.
Some more fun with floats:
#v+
>>> v - v1
0.31231230000003052
>>> s = str(v)
>>> s
'2312.3123123'
>>> s[s.find("."):]
'.3123123'
>>> float(s[s.find("."):])
0.31231229999999999
#v-
So if you only want to print the fractional value, str() will do fine.
But str() won't make floats capable of representing arbitrary numbers,
either ;-)
-- Gerhard
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