Raise X or Raise X()?

[Jean-Michel Pichavant]

bvdp wrote:
> Which is preferred in a raise: X or X()? I've seen both. In my specific case I'm dumping out of a deep loop:
>
> try:
>   for ...
>     for ...
>       for ...
>         if match:
>            raise StopInteration()
>          else ...
>
> except StopInteration:
>    print "found it"
>   

I prefer the raise X() version, it fulfils the zen of python :

"Special cases aren't special enough to break the rules.
There should be one-- and preferably only one --obvious way to do it."

I still wonder why they've added the class raise form, on which purpose.

JM