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[Python-Dev] PEP 409 update [was: PEP 409 - final?]
Ethan Furmanethan at stoneleaf.us
Fri Feb 3 03:42:52 CET 2012
Nick Coghlan wrote:> FWIW, I expect the implementation will *allow* "raise exc from> Ellipsis" as an odd synonym for "raise exc".Are we sure we want that? Raising from something not an exception seems counter-intuitive (None being the obvious exception).> I'd want to allow> "exc.__cause__ = Ellipsis" to reset an exception with a previously set> __cause__ back to the default state,Already done. :)> at which point the synonym> follows from the semantics of "raise X from Y" as syntactic sugar for> "_exc = X; _exc.__cause__ = Y; raise _exc"I can see where it would make some sense that way, but it still seems odd.~Ethan~
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