Formatting numbers

[Steve Holden]

"Matthew Dixon Cowles" <matt at mondoinfo.com> wrote in ...
> On Tue, 1 May 2001 16:13:30 -0700, Daniel Klein <DanielK at jBASE.com>
> wrote:
> 
> >Given an integer, 12345, how to format this to 123.45 ?
> 
> Here's one way:
> 
> >>> 12345/100.0 
> 123.45
> 
> You need the ".0" or at least the dot in order to force floating-point
> division.
> 
But:

>>> 12340/100.0
123.40000000000001
>>> 12300/100.0
123.0

so this won't be useful in the general case.  One way might be:

>>> def fmt(i):
...      bits = divmod(i, 100)
...      return "%d.%02d" % bits
... 
>>> fmt(12345)
'123.45'
>>> fmt(12340)
'123.40'
>>> fmt(12300)
'123.00'

The locale module also contains number formatting routines IIRC.

regards
 Steve