[Python-3000] Exception re-raising woes

[Antoine Pitrou]

Hello,

Guido van Rossum <guido <at> python.org> writes:
> 
> That said, it seems you are proposing taking the logical consequence
> of making except handlers properly nested and scoped,

It's exactly that.

> I would be okay as well with restricting bare raise syntactically to
> appearing only inside an except block, to emphasize the change in
> semantics that was started when we decided to make the optional
> variable disappear at the end of the except block.
> 
> This would render the following code illegal:
> 
> def f():
>   try: 1/0
>   except: pass
>   raise

Please note as well that:

def f():
  try: 1/0
  except: pass
  return sys.exc_info()

would return (None, None, None).
Actually, it already does with the patch I proposed for #2507, and the test
suite runs fine after fixing a problem in doctest.py.

Regards

Antoine.