human
Complete the below
@connect_on_app_finalize
def add_chain_task(app):

    ''''No longer used, but here for backwards compatibility.'
    '''

=====
Write me a the Python program you requested?
assistant
#Here is the Python program you requested.
    @app.task(name=u'celery.chain', shared=False, lazy=False)
    def chain(*args, **kwargs):
        raise NotImplementedError(u'chain    is    not    a    real    task')
    return chain