As the subject line says, as Guido's delegate, I'm accepting Benjamin's PEP 415 with the current reference implementation. This PEP changes the implementation of the new "raise exc from None" syntax to eliminate the use of Ellipsis as a "not set" sentinel value in favour of a separate "__suppress_context__" attribute on exceptions. This new flag defaults to False, but is implicitly set to True whenever a value is assigned to __cause__ (regardless of whether that happens via direct assignment , the new syntax or the C API).
The question of how the builtin and standard library exception display routines should handle the cause where both __cause__ and __context__ are set and __suppress_context__ has been explicitly set to False will be decided independently of the PEP acceptance (see http://bugs.python.org/issue14805). Regards, Nick. -- Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
