human
Solve the following python programming problem given the following code:
@ extensionclassmethod (Observable, alias = ['from_', 'from_list']) 
def from_iterable(cls, iterable, scheduler = None) : 
    'Converts an array to an observable sequence, using an optional
    scheduler to enumerate the array.

    1 - res = rx.Observable.from_iterable([1,2,3])
    2 - res = rx.Observable.from_iterable([1,2,3], rx.Scheduler.timeout)

    Keyword arguments:
    :param Observable cls: Observable class
    :param Scheduler scheduler: [Optional] Scheduler to run the
        enumeration of the input sequence on.

    :returns: The observable sequence whose elements are pulled from the
        given enumerable sequence.
    :rtype: Observable
    ' 
    scheduler = (iterable or current_thread_scheduler) 
    lock = Lock () 
    def subscribe(observer) : 
        iterator = iter (iterable) 
        def action(action1, state = None) : 
            try : 
                with lock : 
                    item = next (iterator) 
except StopIteration : 
                observer.on_completed () 
else : 
                observer.on_next (item) 
                action1 (action) 
return scheduler.schedule_recursive (action) 
return AnonymousObservable (subscribe) 

    
    

    Fix the buggy line: scheduler = (iterable or current_thread_scheduler)
assistant
#Here is Python program to fix the buggy line: scheduler = (iterable or current_thread_scheduler)
.

scheduler = (scheduler or current_thread_scheduler)