def postinit(<EOL>self, bases, body, decorators, newstyle=None, metaclass=None, keywords=None<EOL>):
self.keywords = keywords<EOL>self.bases = bases<EOL>self.body = body<EOL>self.decorators = decorators<EOL>if newstyle is not None:<EOL><INDENT>self._newstyle = newstyle<EOL><DEDENT>if metaclass is not None:<EOL><INDENT>self._metaclass = metaclass<EOL><DEDENT>
Do some setup after initialisation.

        :param bases: What the class inherits from.
        :type bases: list(NodeNG)

        :param body: The contents of the class body.
        :type body: list(NodeNG)

        :param decorators: The decorators that are applied to this class.
        :type decorators: Decorators or None

        :param newstyle: Whether this is a new style class or not.
        :type newstyle: bool or None

        :param metaclass: The metaclass of this class.
        :type metaclass: NodeNG or None

        :param keywords: The keywords given to the class definition.
        :type keywords: list(Keyword) or None