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Twisted 2.5.0 is a major feature release, with several interesting new
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developments and a great number of bug fixes. Some of the highlights
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* AMP, the Asynchronous Messaging Protocol, was introduced. AMP is
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a protocol which provides request/response semantics over a
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persistent connection in a very simple and extensible manner.
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* An Epoll-based reactor was added, which can be used with twistd or
13
trial by passing "-r epoll" on the command line. This may improve
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performance of certain high-traffic network applications.
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* The 'twistd' command can now accept sub-commands which name an
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application to run. For example, 'twistd web --path .' will start a
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web server serving files out of the current directory. This
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functionality is meant to replace the old way of doing things with
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'mktap' and 'twistd -f'.
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* Python 2.5 is now supported. Previous releases of Twisted were
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broken by changes in the release of Python 2.5.
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* 'inlineCallbacks' was added, which allows taking advantage of the
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new 'yield' expression syntax in Python 2.5 to avoid writing
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callbacks for Deferreds.
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In addition to these changes, there are many other minor features and
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a large number of bug fixes.
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- log.err can now take a second argument for specifying information
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about an error (#1399)
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- A time-simulating test helper class, twisted.internet.task.Clock,
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- Trial docstring improvements were made (#1604, #2133)
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- New SSL features were added to twisted.internet.ssl, such as client
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- Python 2.5 is now supported (#1867)
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- Trial's assertFailure now provides more information on failure (#1869)
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- Trial can now be run on tests within a zipfile (#1940)
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- AMP, a new simple protocol for asynchronous messaging, was added (#1715)
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- Trial's colorful reporter now works on win32 (#1646)
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- Trial test modules may now dynamically construct TestSuites (#1638, #2165)
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- twistd can now make use of plugins to run applications (#1922, #2013)
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- Twisted now works with the latest (unreleased) zope.interface (#2160)
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- An epoll-based reactor, epollreactor, was added. It is selectable
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with the -r options to twistd and trial (#1953)
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- twistd and trial now use the plugin system to find reactors which
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can be selected (#719)
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- twisted.internet.defer.inlineCallbacks was added. It takes
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advantage of Python 2.5's generators to offer a way to deal with
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Deferreds without callbacks (#2100)
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- Traceback formatting in Trial was improved (#1454, #1610)
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- twisted.python.filepath.FilePath.islink now actually returns True when
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- twisted.plugin now no longer raises spurious errors (#926)
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- twisted.pb Cacheables may now be new-style classes (#1324)
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- FileDescriptor now deals with producers in a more
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interface-compliant and robust manner (#2286, #811)
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- "setup.py build" and other setup.py commands which don't actually
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install the software now work (#1835)
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- wxreactor has had various fixes (#1235, #1574, #1688)
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Deprecations and Removals
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-------------------------
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- The old twisted.cred API (Perspectives, Identities and such) was
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- twisted.spread.newjelly was removed (#1831)
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- Various deprecated things in twisted.python.components were
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removed: Interface, MetaInterface, getAdapterClass, and
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getAdapterClassWithInheritance (#1636)
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- twisted.enterprise.xmlreflector was removed (#661)
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- mktap is slowly on its way out, now that twistd supports plugins. It
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is not yet officially deprecated (#2013)
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- tkmktap was removed, because it wasn't working anyway (#2020)
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- reactor.iterate calls made inside of a Trial test case are
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- twisted.internet.qtreactor was removed: It has been moved to a
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separate project. See http://twistedmatrix.com/trac/wiki/QTReactor
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- threadedselectreactor is now not a directly usable reactor; it is
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only meant to help in writing other reactors (#2126)
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- twisted.python.reflect.funcinfo is deprecated (#2079)
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- twisted.spread.sturdy, which was already completely broken, was
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The following changes are minor or closely related to other changes.
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- #1783, #1786, #1788, #1648, #1734, #1609, #1800, #1818,
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#1629, #1829, #491, #1816, #1824, #1855, #1797, #1637, #1371,
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#1892, #1887, #1897, #1563, #1741, #1943, #1952, #1276,
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#1837, #1726, #1963, #1965, #1973, #1976, #1991, #1936, #1113,
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#630, #2002, #2040, #2044, #1617, #2045, #2055, #2056, #2022,
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#2052, #1552, #1999, #1507, #2054, #1970, #1968, #662, #1910,
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#1694, #1999, #1409, #2150, #2127, #2155, #1983, #2014, #2222,
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#1067, #2136, #2065, #1430, #2173, #2212, #1871, #2147, #1199,
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#2273, #428, #992, #815, #2024, #2292, #2125, #2139, #2291, #2174,
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#2306, #2228, #2309, #2319, #2317, #2313, #2154, #1985, #1201
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