[Python-Dev] 2.2a3 error messages

[Guido van Rossum]

> maybe it's just me, but I just spent five minutes trying to figure
> out why an innocent-looking line of code resulted in an "iter() of
> non-sequence" type error.
> 
> I finally ran it under 2.1, and immediately realized what was
> wrong.
> 
> is there any chance of getting the old, far more helpful "unpack
> non-sequence" and "loop over non-sequence" error messages
> back before 2.2 final?

Can you show an example of what went wrong?  Is it just the
distinction between "unpack" vs. "loop over"?  I would like to make
the errors more helpful, but I'm not sure where to start.

--Guido van Rossum (home page: http://www.python.org/~guido/)