[Patches] Change to attribute error message for instances.

[Skip Montanaro]

    >> I think we may have to be careful with this (kind of) change...  At
    >> the very least I'll mention it in the list of code breakage on
    >> python.org/1.6/.

    David> Sure, but I want to point out that this kind of change is what
    David> helps newbies more than almost anything else -- Python's error
    David> messages are liked by folks who have to deal with bad C compilers
    David> on a daily basis, but hated by real newbies.

I will re-raise my suggestion that somewhere along the way Python needs
error codes as well as error messages (maybe not until Py3k).  I know it
won't be easy to do, but if people are really parsing exception messages in
their scripts, it suggests a need for error codes to make that job easier.

-- 
Skip Montanaro | http://www.mojam.com/
skip@mojam.com | http://www.musi-cal.com/