Latest addition for PEP 409 has been sent. Text follows:
Language Details ================ Currently, __context__ and __cause__ start out as None, and then get set as exceptions occur. To support 'from None', __context__ will stay as it is, but __cause__ will start out as False, and will change to None when the 'raise ... from None' method is used. If __cause__ is False the __context__ (if any) will be printed. If __cause__ is None the __context__ will not be printed. if __cause__ is anything else, __cause__ will be printed. This has the benefit of leaving the __context__ intact for future logging, querying, etc., while suppressing its display if it is not caught. raise ... from ... is not disallowed outside a try block, but this behavior is not guaranteed to remain. ------------------------------------------------------------------ Should that last disclaimer be there? Should it be changed? ~Ethan~ _______________________________________________ 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
