Method subclass_with_self

celery/app/base.py:1256–1289

Subclass an app-compatible class. App-compatible means that the class has a class attribute that provides the default app it should use, for example: ``class Foo: app = None``. Arguments: Class (type): The app-compatible class to subclass. na

(self, Class, name=None, attribute='app',
                           reverse=None, keep_reduce=False, **kw)

        )

    def subclass_with_self(self, Class, name=None, attribute='app',
                           reverse=None, keep_reduce=False, **kw):
        """Subclass an app-compatible class.

        App-compatible means that the class has a class attribute that
        provides the default app it should use, for example:
        ``class Foo: app = None``.

        Arguments:
            Class (type): The app-compatible class to subclass.
            name (str): Custom name for the target class.
            attribute (str): Name of the attribute holding the app,
                Default is 'app'.
            reverse (str): Reverse path to this object used for pickling
                purposes. For example, to get ``app.AsyncResult``,
                use ``"AsyncResult"``.
            keep_reduce (bool): If enabled a custom ``__reduce__``
                implementation won't be provided.
        """
        Class = symbol_by_name(Class)
        reverse = reverse if reverse else Class.__name__

        def __reduce__(self):
            return _unpickle_appattr, (reverse, self.__reduce_args__())

        attrs = dict(
            {attribute: self},
            __module__=Class.__module__,
            __doc__=Class.__doc__,
            **kw)
        if not keep_reduce:
            attrs['__reduce__'] = __reduce__

        return type(name or Class.__name__, (Class,), attrs)

    def _rgetattr(self, path):
        return attrgetter(path)(self)