Python Sort Collections.DefaultDict in Descending order

Question

I have this bit of code:

    visits = defaultdict(int)
    for t in tweetsSQL:
         visits[t.user.from_user] += 1

I looked at some examples online that used the sorted method like so:

sorted(visits.iteritems, key=operator.itemgetter(1), reverse=True)

but it is giving me:

"TypeError: 'builtin_function_or_method' object is not iterable"

I am not sure why.