None Set the given exc_info as the Future’s exception. Understands both asyncio.Future and the extensions in older versions of Tornado to enable better tracebacks on Python 2. Added in version 5.0. Changed removed. • StaticFileHandler returns the correct Content-Type for files with .gz, .bz2, and .xz extensions. • Responses smaller than 1000 bytes will no longer be compressed. • The default gzip compression • AsyncTestCase once again passes along arguments to test methods, making it compatible with extensions such as Nose’s test generators. • StaticFileHandler can again compress its responses when gzip

asyncio.Future [https://docs.python.org/3/library/asyncio- future.html#asyncio.Future] and the extensions in older versions of Tornado to enable better tracebacks on Python 2. Added in version 5.0. Changed been removed. StaticFileHandler returns the correct Content-Type for files with .gz, .bz2, and .xz extensions. Responses smaller than 1000 bytes will no longer be compressed. The default gzip compression level cancelled. AsyncTestCase once again passes along arguments to test methods, making it compatible with extensions such as Nose’s test generators. StaticFileHandler can again compress its responses when gzip is