Perform initialization actions with the given :class:`flask.Flask`
        object.

        :param app: The flask application object
        :type app: flask.Flask

def _init_app(self, app):
        """Perform initialization actions with the given :class:`flask.Flask`
        object.

        :param app: The flask application object
        :type app: flask.Flask
        """
        app.handle_exception = partial(self.error_router, app.handle_exception)
        app.handle_user_exception = partial(self.error_router, app.handle_user_exception)

        if len(self.resources) > 0:
            for resource, urls, kwargs in self.resources:
                self._register_view(app, resource, *urls, **kwargs)