At 12:53 PM 3/28/2009 +1200, Greg Ewing wrote:
Guido van Rossum wrote:
Perhaps the crux is that *if* you accidentally use "return <value>" in
a vanilla generator expecting the value to show up somewhere, you are
probably enough of a newbie that debugging this will be quite hard.
I'd like not to have such a newbie trap lying around.
Okay, so would you be happy if the for-loop were to
raise an exception if it gets a StopIteration whose
value is not None?
Wouldn't it have to be more than just for-loops? What about list(),
map(), ...?
It seems a lot simpler to just make it use a different exception, as
nothing else has to change for that to work correctly; the new
construct can just catch it, and everywhere else it's an error.
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