How to write this regular expression?

[Fredrik Lundh]

"D H" <a at b.c> wrote:

> > Why do you think you need a regular expression?
> >
> > If another approach that involved no regular expressions worked much
> > better, would you reject it for some reason?
>
> A regular expression will work fine for his problem.
> Just match the digits separated by underscores using a regular
> expression, then afterward check if the values are valid.

you forgot to mention Boo here, Doug.  nice IronPython announcement,
btw.  the Boo developers must be so proud of you.

</F>