handlers that were added. • OverrideResolver now accepts per-family overrides. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.platform result in “BufferError: Existing exports of data: object cannot be re- sized”. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.testing no longer wake up several times a second. • tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeatedly. tornado.template • Exceptions in template code

handlers that were added. • OverrideResolver now accepts per-family overrides. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.platform result in “BufferError: Existing exports of data: object cannot be re- sized”. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. 5.9. Release notes no longer wake up several times a second. • tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeatedly. tornado.template • Exceptions in template code

overrides. 162 Chapter 6. Documentation Tornado Documentation, Release 6.0.4 tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.platform result in “BufferError: Existing exports of data: object cannot be re- sized”. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.testing no longer wake up several times a second. • tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeatedly. tornado.template • Exceptions in template code

handlers that were added. • OverrideResolver now accepts per-family overrides. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.platform result in “BufferError: Existing exports of data: object cannot be re-sized”. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.testing no longer wake up several times a second. • tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeat- edly. tornado.template • Exceptions in template code

handlers that were added. • OverrideResolver now accepts per-family overrides. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. 178 Chapter 6. result in “BufferError: Existing exports of data: object cannot be re-sized”. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.testing no longer wake up several times a second. • tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeat- edly. 6.9. Release notes 231 Tornado Documentation

handlers that were added. • OverrideResolver now accepts per-family overrides. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.platform result in “BufferError: Existing exports of data: object cannot be re-sized”. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.testing no longer wake up several times a second. • tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeat- edly. tornado.template • Exceptions in template code

handlers that were added. • OverrideResolver now accepts per-family overrides. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.platform result in “BufferError: Existing exports of data: object cannot be re-sized”. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.testing no longer wake up several times a second. • tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeat- edly. tornado.template • Exceptions in template code

handlers that were added. • OverrideResolver now accepts per-family overrides. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. 182 Chapter 6. result in “BufferError: Existing exports of data: object cannot be re-sized”. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.testing no longer wake up several times a second. • tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeat- edly. 6.9. Release notes 235 Tornado Documentation

handlers that were added. OverrideResolver now accepts per-family overrides. tornado.options Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.platform result in “BufferError: Existing exports of data: object cannot be re- sized”. tornado.options Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.testing IOLoops no longer wake up several times a second. tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeatedly. tornado.template Exceptions in template code will

handlers that were added. • OverrideResolver now accepts per-family overrides. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. 6.9. Release notes result in “BufferError: Existing exports of data: object cannot be re-sized”. tornado.options • Duplicate option names are now detected properly whether they use hyphens or underscores. tornado.testing no longer wake up several times a second. • tornado.ioloop.PeriodicCallback no longer triggers duplicate callbacks when stopped and started repeat- edly. 242 Chapter 6. DocumentationTornado Documentation