.. module:: tornado.platform.twisted
.. deprecated:: 6.0 This module is no longer recommended for new code. Instead of using direct integration between Tornado and Twisted, new applications should rely on the integration with ``asyncio`` provided by both packages.
Importing this module has the side effect of registering Twisted's Deferred
class with Tornado's @gen.coroutine so that Deferred objects can be
used with yield in coroutines using this decorator (importing this module has
no effect on native coroutines using async def).
.. function:: install()
Install ``AsyncioSelectorReactor`` as the default Twisted reactor.
.. deprecated:: 5.1
This function is provided for backwards compatibility; code
that does not require compatibility with older versions of
Tornado should use
``twisted.internet.asyncioreactor.install()`` directly.
.. versionchanged:: 6.0.3
In Tornado 5.x and before, this function installed a reactor
based on the Tornado ``IOLoop``. When that reactor
implementation was removed in Tornado 6.0.0, this function was
removed as well. It was restored in Tornado 6.0.3 using the
``asyncio`` reactor instead.
Twisted-based asynchronous resolver.
This is a non-blocking and non-threaded resolver. It is
recommended only when threads cannot be used, since it has
limitations compared to the standard getaddrinfo-based
~tornado.netutil.Resolver and
~tornado.netutil.DefaultExecutorResolver. Specifically, it returns at
most one result, and arguments other than host and family
are ignored. It may fail to resolve when family is not
socket.AF_UNSPEC.
Requires Twisted 12.1 or newer.
.. versionchanged:: 5.0 The ``io_loop`` argument (deprecated since version 4.1) has been removed.
.. deprecated:: 6.2 This class is deprecated and will be removed in Tornado 7.0. Use the default thread-based resolver instead.