python b.python 8 works on XP but not on Vista?

[Isaac Gouy]

On Mar 6, 4:02 pm, Chris Rebert <c... at rebertia.com> wrote:
> On Sat, Mar 6, 2010 at 3:53 PM, Isaac Gouy <igo... at yahoo.com> wrote:
> > At the command prompt:
>
> >   python b.py 8
> > works fine on both XP and Vista
>
> >   python b.python 8
> > works on XP (and Linux)
>
> > but on Vista
>
> >   python b.python 8
>
> > ImportError: No module named b
>
> > ?
>
> Code please.


It's the same code in both cases, I simply renamed "b.python" as
"b.py" as a test.


> Also, .python is not a standard extension for Python
> files, so why are you using it anyway?

Because it's useful for what I'm doing.

Given python 2.6.4 has no problem with a non-standard extension on MS
XP and Linux - why does python 2.6.4 have this problem with a non-
standard extension on MS Vista?