Can Python format long integer 123456789 to 12,3456,789 ?

[John Machin]

james.wondrasek at gmail.com wrote:
> A.M wrote:
> > Hi,
> >
> > Is there any built in feature in Python that can format long integer
> > 123456789 to 12,3456,789 ?
> >
> > Thank you,
> > Alan
>
> I did this for putting commas into monetary amounts (thus the .2f):
>
> def commas(value):
>         return "".join(commafy("%.2f" % value))
>
> def commafy(s):
>         pieces = s.split(".")
>         l = len(pieces[0])
>         for i in range(0,l):
>                 if (l - i) % 3 or not i:
>                         yield pieces[0][i]
>                 else:
>                         yield ","
>                         yield pieces[0][i]
>         if len(pieces) > 1:
>                 yield "." + pieces[1]
> 

I dips me lid -- that's far fuglier than mine!!!