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

        :param type: The types that the block handles.
        :type type: Tuple or NodeNG or None

        :param name: The name that the caught exception is assigned to.
        :type name: AssignName or None

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