human
Solve the following python programming problem given the following code:
def init_celery_app(app, celery) : 
    celery.config_from_object (app.config) 
    class ContextTask (Task) : 
        abstract = True 
        def __call__(self, * args, **kwargs) : 
            with create_app ().app_context () : 
                return super (ContextTask, self).__call__ (* args, ** kwargs) 
celery.Task = ContextTask 
    sentry_dsn = celery.config ['KOZMIC_SENTRY_DSN'] 
    if sentry_dsn : 
        client = raven.Client (sentry_dsn) 
        raven.contrib.celery.register_signal (client) 

    
    

    Fix the buggy line: sentry_dsn = celery.config ['KOZMIC_SENTRY_DSN']
assistant
#Here is Python code to fix the buggy line: sentry_dsn = celery.

sentry_dsn = app.config ['KOZMIC_SENTRY_DSN']