get number that is raised to the power of

[Python.Arno]

On 2 mei 2008, at 11:19, Astan Chee wrote:

> Hi,
> Im not sure if this is more of a math question or a python question.  
> I have a variable in python:
> >>> v = 10.0**n
> is there a way to find the value of n if i know only v aside from  
> str(v).split('+')[1] ? that seems like too much of a hack and I was  
> wondering if there was a faster way of doing it?
> Thanks for any pointers
> Astan
>

>

the "reverse" of a power to is logarithm
so v = 10**n  <=>  math.log(v,10) = n

Arno