human
Solve the following python programming problem given the following code:
def lru_cache(size) : 
    'Decorator that adds a least-recently-accessed cache to a method.
    
    :param size: the maximum number of items to keep in the cache.
    ' 
    def decorate_function(func) : 
        prefix = ('_%s_' % func.__name__) 
        @ wraps (func) 
        def wrapper(self, * args) : 
            if (not hasattr (self, (prefix + 'cache'))) : 
                cache = { 
                    
} 
                queue = deque () 
                refcount = defaultdict (int) 
                setattr (self, (prefix + 'cache'), cache) 
                setattr (self, (prefix + 'queue'), queue) 
                setattr (self, (prefix + 'refcount'), refcount) 
else : 
                cache = getattr (self, (prefix + 'cache')) 
                queue = getattr (self, (prefix + 'queue')) 
                refcount = getattr (self, (prefix + 'refcount')) 
qpend = queue.append 
            qpop = queue.popleft 
            try : 
                result = cache [args] 
except KeyError : 
                result = cache [args] = func (self, * args) 
qpend (args) 
            refcount [args] += 1 
            while (len (cache) > size) : 
                k = qpop () 
                refcount [k] -= 1 
                if (not refcount [k]) : 
                    del cache [k] 
                    del refcount [k] 
if (len (queue) > (size * 4)) : 
                for _ in xrange (len (queue)) : 
                    k = qpop () 
                    if (refcount [k] == 1) : 
                        qpend (k) 
else : 
                        refcount [k] -= 1 
return result 
return wrapper 
return size 

    
    

    Fix the buggy line: return size
assistant
#Here is Python program to fix the buggy line: return size
.

return def decorate_function(