[Python-3000] raise with traceback?

[Terry Reedy]

"Guido van Rossum" <guido at python.org> wrote in message 
news:ca471dc20608200853i318d1051kc8cc8cfff1b7eb0a at mail.gmail.com...
> I wonder if "raise ValueError" should still be allowed (as equivalent
> to "raise ValueError()") or that it should be disallowed.

+1 for disallow.

raise <exception class instance> is a simple rule to remember.

Having VE == VE() in certain contexts is/would be like haveing s.len == 
s.len() or func == func() (a moderately frequent newbie request) in certain 
contexts.

Plus, why encourage less-helpful, no message exceptions ;-)

Terry Jan Reedy