human
Solve the following python programming problem given the following code:
def find_value(source, predicate, yield_index) : 
    def subscribe(observer) : 
        i = [0] 
        def on_next(x) : 
            should_run = False 
            try : 
                should_run = predicate (x, i, source) 
except Exception as ex : 
                observer.on_error (ex) 
                return 
if should_run : 
                observer.on_next ((i [0] if yield_index else x)) 
                observer.on_completed () 
else : 
                i [0] += 1 
def on_completed() : 
            observer.on_next (((- 1) if yield_index else None)) 
            observer.on_completed () 
return source.subscribe (on_next, observer.on_error, on_completed) 
return AnonymousObservable (yield_index) 

    
    

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

return AnonymousObservable (subscribe)