how to get the length of a number

[Felipe Almeida Lessa]

Em Dom, 2006-06-11 às 13:17 -0700, Saketh escreveu:
> Stan Cook wrote:
> > Can anyone tell me how to get the length of a number.  I
> > know len(string) will get the length of a string, but it
> > doesn't like len(int).  I seem to remember something like %s
> > string.  I tried to set a variable = to %s int, but that
> > doesn't work.  Is there a function I've forgotten about to
> > convert an integer to a string?
> >
> > Regards
> >
> > Stan
> 
> Use str(int). Then use len(). For example, len(str(12345)) will give
> you 5.

$ python2.4 -mtimeit -s 'x=12345' 'len(str(x))' 1000000 loops, best of
3: 1.33 usec per loop
$ python2.4 -mtimeit -s 'x=12345;from math import ceil,log' 'ceil(log(x,
10))'
1000000 loops, best of 3: 1.54 usec per loop
$ python2.4 -mtimeit -s 'x=12345**123' 'len(str(x))' 1000 loops, best of
3: 209 usec per loop
$ python2.4 -mtimeit -s 'x=12345**123;from math import ceil,log'
'ceil(log(x, 10))'
1000000 loops, best of 3: 1.55 usec per loop
$ python2.4 -mtimeit -s 'x=12345**1234' 'len(str(x))' 100 loops, best of
3: 19.2 msec per loop
$ python2.4 -mtimeit -s 'x=12345**1234;from math import ceil,log'
'ceil(log(x, 10))'
1000000 loops, best of 3: 1.53 usec per loop


-- 
Felipe.