def postinit(self, func=None, args=None, keywords=None):
self.func = func<EOL>self.args = args<EOL>self.keywords = keywords<EOL>
Do some setup after initialisation.

        :param func: What is being called.
        :type func: NodeNG or None

        :param args: The positional arguments being given to the call.
        :type args: list(NodeNG) or None

        :param keywords: The keyword arguments being given to the call.
        :type keywords: list(NodeNG) or None