On 20 June 2015 at 19:00, Stefan Behnel <[email protected]> wrote: > And that is the crux in your proposal: you're changing the default > behaviour into its opposite. In order to do that, it should be reasonably > likely that the current standard behaviour is not intended in more than > half of the cases. I find that difficult to estimate.
I think in this case the design decision can be made more on the basis of how difficult it is to flip the behaviour to the non-default case: Status quo: "Dear CPython core developers, why do you hate us so? Signed, everyone that has ever needed to manually chain exceptions at the C level using the current C API" (OK, it's not *that* bad as C level coding goes, but it's still pretty arcane, requiring a lot of knowledge of exception handling implementation details) With Victor's PEP: "Call PyErr_Clear() before setting your exception to disable the implicit exception chaining in 3.6+ in a way that remains entirely compatible with older Python versions" Given that significant difference in relative usability, +1 from me for changing the default behaviour. Cheers, Nick. -- Nick Coghlan | [email protected] | Brisbane, Australia _______________________________________________ Python-Dev mailing list [email protected] https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com