def postinit(self, body=None, handlers=None, orelse=None):
self.body = body<EOL>self.handlers = handlers<EOL>self.orelse = orelse<EOL>
Do some setup after initialisation.

        :param body: The contents of the block to catch exceptions from.
        :type body: list(NodeNG) or None

        :param handlers: The exception handlers.
        :type handlers: list(ExceptHandler) or None

        :param orelse: The contents of the ``else`` block.
        :type orelse: list(NodeNG) or None