higher is required. Twisted [http://www.twistedmatrix.com] may be used with the classes in tornado.platform.twisted. pycares [https://pypi.python.org/pypi/pycares] is an alternative non-blocking DNS resolver adjustements are frequent. No longer needed in Python 3.3. Platforms: Tornado should run on any Unix-like platform, although for the best performance and scalability only Linux (with epoll) and BSD (with kqueue) frameworks and servers tornado.platform.asyncio — Bridge between asyncio and Tornado tornado.platform.caresresolver — Asynchronous DNS Resolver using C-Ares tornado.platform.twisted — Bridges between Twisted

Libcurl version 7.22 or higher is required. • Twisted may be used with the classes in tornado.platform.twisted. • pycares is an alternative non-blocking DNS resolver that can be used when threads are adjustments are frequent. No longer needed in Python 3. Platforms: Tornado should run on any Unix-like platform, although for the best performance and scalability only Linux (with epoll) and BSD (with kqueue) is blocked for more than s seconds. Pass seconds=None to disable. Requires Python 2.6 on a unixy platform. The action parameter is a Python signal handler. Read the documentation for the signal module

higher is required. Twisted [http://www.twistedmatrix.com] may be used with the classes in tornado.platform.twisted. pycares [https://pypi.python.org/pypi/pycares] is an alternative non-blocking DNS resolver adjustments are frequent. No longer needed in Python 3. Platforms: Tornado should run on any Unix-like platform, although for the best performance and scalability only Linux (with epoll) and BSD (with kqueue) frameworks and servers tornado.platform.caresresolver — Asynchronous DNS Resolver using C-Ares tornado.platform.twisted — Bridges between Twisted and Tornado tornado.platform.asyncio — Bridge between asyncio

Libcurl version 7.22 or higher is required. • Twisted may be used with the classes in tornado.platform.twisted. • pycares is an alternative non-blocking DNS resolver that can be used when threads are adjustements are frequent. No longer needed in Python 3.3. Platforms: Tornado should run on any Unix-like platform, although for the best performance and scalability only Linux (with epoll) and BSD (with kqueue) Tornado runner from within a corou- tine that is already using the asyncio runner, use the tornado.platform.asyncio.to_asyncio_future adapter. How it works A function containing yield is a generator. All

AI_NUMERICHOST. reuse_port option sets SO_REUSEPORT option for every socket in the list. If your platform doesn’t support this option ValueError will be raised. 6.4. Asynchronous networking 113 Tornado ThreadedResolver (deprecated) • tornado.netutil.OverrideResolver • tornado.platform.twisted.TwistedResolver (deprecated) • tornado.platform.caresresolver.CaresResolver (deprecated) Changed in version 5.0: The use a specific interface, it has to be handled outside of Tornado as this depends very much on the platform. Raises TimeoutError if the input future does not complete before timeout, which may be specified

AI_NUMERICHOST. reuse_port option sets SO_REUSEPORT option for every socket in the list. If your platform doesn’t support this option ValueError will be raised. 6.4. Asynchronous networking 113 Tornado ThreadedResolver (deprecated) • tornado.netutil.OverrideResolver • tornado.platform.twisted.TwistedResolver (deprecated) • tornado.platform.caresresolver.CaresResolver (deprecated) Changed in version 5.0: The use a specific interface, it has to be handled outside of Tornado as this depends very much on the platform. Raises TimeoutError if the input future does not complete before timeout, which may be specified

AI_NUMERICHOST. reuse_port option sets SO_REUSEPORT option for every socket in the list. If your platform doesn’t support this option ValueError will be raised. 6.4. Asynchronous networking 113 Tornado ThreadedResolver (deprecated) • tornado.netutil.OverrideResolver • tornado.platform.twisted.TwistedResolver (deprecated) • tornado.platform.caresresolver.CaresResolver (deprecated) Changed in version 5.0: The use a specific interface, it has to be handled outside of Tornado as this depends very much on the platform. Raises TimeoutError if the input future does not complete before timeout, which may be specified

AI_NUMERICHOST. reuse_port option sets SO_REUSEPORT option for every socket in the list. If your platform doesn’t support this option ValueError will be raised. tornado.netutil.bind_unix_socket(file: str • tornado.netutil.ThreadedResolver (deprecated) • tornado.netutil.OverrideResolver • tornado.platform.caresresolver.CaresResolver (deprecated) Changed in version 5.0: The default implementation has use a specific interface, it has to be handled outside of Tornado as this depends very much on the platform. Raises TimeoutError if the input future does not complete before timeout, which may be specified

AI_NUMERICHOST. reuse_port option sets SO_REUSEPORT option for every socket in the list. If your platform doesn’t support this option ValueError will be raised. 112 Chapter 6. Documentation Tornado Documentation ThreadedResolver (deprecated) • tornado.netutil.OverrideResolver • tornado.platform.twisted.TwistedResolver (deprecated) • tornado.platform.caresresolver.CaresResolver (deprecated) Changed in version 5.0: The use a specific interface, it has to be handled outside of Tornado as this depends very much on the platform. Raises TimeoutError if the input future does not complete before timeout, which may be specified

Libcurl version 7.22 or higher is required. • Twisted may be used with the classes in tornado.platform.twisted. • pycares is an alternative non-blocking DNS resolver that can be used when threads are Documentation, Release 6.1 reuse_port option sets SO_REUSEPORT option for every socket in the list. If your platform doesn’t support this option ValueError will be raised. tornado.netutil.bind_unix_socket(file: str ThreadedResolver (deprecated) • tornado.netutil.OverrideResolver • tornado.platform.twisted.TwistedResolver • tornado.platform.caresresolver.CaresResolver Changed in version 5.0: The default implementation