It's been answered here:
http://stackoverflow.com/questions/26924045/python-3-x-beazley-context-vs- cause-attributes-in-exception-handling?noredirect=1#comment42403467_26924045 -- https://mail.python.org/mailman/listinfo/python-list
It's been answered here:
http://stackoverflow.com/questions/26924045/python-3-x-beazley-context-vs- cause-attributes-in-exception-handling?noredirect=1#comment42403467_26924045 -- https://mail.python.org/mailman/listinfo/python-list