def breadth( iterable, testFn=isIterable, limit=sys.getrecursionlimit()):
    deq = _deque((x,0) for x in iterable)
    while deq :
        arg, level = deq.popleft()
        if testFn(arg) and level<limit :
            for a in arg :
                deq.append ((a, level+1))
        else :
            yield arg
Checks that the given URL is a video that can be played by QuickTime (qt, mpeg)
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/util/arguments.py/breadth--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-0.96/django/core/validators.py/isValidQuicktimeVideoURL