On 10/6/10 5:54 PM, Steven D'Aprano wrote:
I want the mantissa and decimal exponent of a float, in base 10:
mantissa and exponent of 1.2345e7
=> (1.2345, 7)
(0.12345, 8) would also be acceptable.
The math module has a frexp() function, but it produces a base-2 exponent:
math.frexp(1.2345e7)
(0.73581933975219727, 24)
Have I missed a built-in or math function somewhere?
|7> def frexp10(x):
..> exp = int(math.log10(x))
..> return x / 10**exp, exp
..>
|8> frexp10(1.2345e7)
(1.2344999999999999, 7)
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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