def __init__(self, interval, stream=sys.stdout, registry=None, io_loop=None):
super(TornadoStreamReporter, self).__init__(interval, registry, io_loop)<EOL>self.stream = stream<EOL>
:param interval: a timedelta
:param stream: the stream to write to, defaults to stdout
:param registry: the registry to report from, defaults to stdout
:param io_loop: the IOLoop to use, defaults to ``IOLoop.current()``