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

    ''''Task used by Task.replace when replacing task with group.'
    '''
 Can you provide a the Python program you requested?
assistant
#Here is the Python program you requested.
    @app.task(bind=True, name=u'celery.accumulate', shared=False, lazy=False)
    def accumulate(self, *args, **kwargs):
        index = kwargs.get(u'index')
        return (args[index] if (index is not None) else args)
    return accumulate