Quoth Gerhard Häring:
[...sys.argv[0] test in WinXP...]
> C:\>tmp\x.py
> C:\tmp\x.py
What happens if %PATH% includes c:\tmp, and you invoke it simply
as 'x.py', from some other directory?
--
Steven Taschuk "The world will end if you get this wrong."
staschuk at telusplanet.net -- "Typesetting Mathematics -- User's Guide",
Brian Kernighan and Lorrinda Cherry