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

[Isaac Gouy]

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

?
-- 
http://mail.python.org/mailman/listinfo/python-list