Subclass of `flask_rest_api.Blueprint` that is compatible with `flask_classful`

ClassfulBlueprint.py

from flask_rest_api import Blueprint

class ClassfulBlueprint(Blueprint):
    """A subclass of flask_rest_api.Blueprint that stores endpoint documentation 
    not using :meth: `Blueprint.route` but instead with :meth: `Blueprint.add_url_rule`. 
    Since :meth: `Blueprint.route` should never be used from a `ClassfulBlueprint` 
    instance, it throws an error if you try to call it.
    """
    def __getattribute__(self, name):
        if name in ['route']:
            raise AttributeError(name)
        else: 
            return super(ClassfulBlueprint, self).__getattribute__(name)

    def __dir__(self):
        return sorted(
            (set(dir(self.__class__)) | set(self.__dict__.keys())) - set(['route'])
        )

    def add_url_rule(self, rule, endpoint, view_func, **options):
        """ Like :meth: `Flask.Blueprint.add_url_rule, but with a small difference;
        it does the job that :meth: `Blueprint.route` would normally do in flask_rest_api
        by storing the endpoint documentation on the `Blueprint` instance.
        Additionally, `flask_classful` *always* calls `Blueprint.add_url_rule` with both 
        an endpoint and a view_func specified, so those are no longer optional.
        """
        assert '.' not in endpoint, "Blueprint endpoints should not contain dots"
        if hasattr(view_func, '__name__'):
            assert '.' not in view_func.__name__, "Blueprint view function name should not contain dots"
        self.record(lambda s: s.add_url_rule(rule, endpoint, view_func, **options))
        # store endpoint documentation (as `Blueprint.route` would've)
        self._store_endpoint_docs(endpoint, view_func, **options)