--- a/viewer.py Wed Jul 27 23:57:50 2016 +0800
+++ b/viewer.py Wed Jul 27 23:58:19 2016 +0800
application.listen(options.port, options.listen, xheaders=options.xheaders)
- IOLoop.instance().start()
+ IOLoop.current().start()
if __name__ == '__main__':