def __init__(self, app=None, **kwargs):
self.limiter = None<EOL>self.talisman = None<EOL>if app:<EOL><INDENT>self.init_app(app, **kwargs)<EOL><DEDENT>
r"""Extension initialization.

        :param app: An instance of :class:`~flask.Flask`.
        :param \**kwargs: Keyword arguments are passed to ``init_app`` method.