human
Solve the following python programming problem given the following code:
@ extensionclassmethod (Observable, alias = 'just') 
def return_value(cls, value, scheduler = None) : 
    "Returns an observable sequence that contains a single element,
    using the specified scheduler to send out observer messages.
    There is an alias called 'just'.

    example
    res = rx.Observable.return(42)
    res = rx.Observable.return(42, rx.Scheduler.timeout)

    Keyword arguments:
    value -- Single element in the resulting observable sequence.
    scheduler -- [Optional] Scheduler to send the single element on. If
        not specified, defaults to Scheduler.immediate.

    Returns an observable sequence containing the single specified
    element.
    " 
    scheduler = (scheduler or current_thread_scheduler) 
    def subscribe(observer) : 
        def action(scheduler, state = None) : 
            observer.on_next (value) 
            observer.on_completed () 
return scheduler.schedule (action) 
return AnonymousObservable (value) 

    
    

    Fix the buggy line: return AnonymousObservable (value)
assistant
#Here is Python program to fix the buggy line: return AnonymousObservable (value)
.

return AnonymousObservable (def subscribe()