Mailman 3 June 2017 - Twisted

[Twisted-Python] lineCallbacks failure message difference between python2 and 3
by aaron eagerman 21 Jun '17

21 Jun '17

Here's code that generates an error on line #9 in f1() 1 import time, sys 2 from twisted.internet import reactor 3 from twisted.internet.task import deferLater 4 from twisted.internet.defer import inlineCallbacks 5 6 @inlineCallbacks 7 def f1(): 8 yield time.time() 9 {'a': 'A', 'b': 'B'}['c'] # KeyError 10 11 @inlineCallbacks 12 def f2(): 13 yield f1() 14 15 def on_err(failure): 16 print("on_err: ===>", failure.getErrorMessage()) 17 failure.printTraceback(file=sys.stderr) 18 if reactor.running: 19 reactor.stop() 20 21 def done(*args, **kargs): 22 print("done.") 23 reactor.stop() 24 25 deferLater(reactor, 0, f2).addCallback(done).addErrback(on_err) 26 reactor.run() running w/ python 2.7 outputs this: --- <exception caught here> --- File ".....\lib\site-packages\twisted\internet\defer.py", line 1128, in _inlineCallbacks result = g.send(result) File "../temp/tb.py", line 9, in f1 {'a': 'A', 'b': 'B'}['c'] exceptions.KeyError: 'c' python 3.6.1 (twisted 17.5.0) outputs this: File ".....\lib\site-packages\twisted\internet\defer.py", line 1299, in _inlineCallbacks result = result.throwExceptionIntoGenerator(g) File ".....\lib\site-packages\twisted\python\failure.py", line 393, in throwExceptionIntoGenerator return g.throw(self.type, self.value, self.tb) File "../temp/tb.py", line 13, in f2 yield f1() builtins.KeyError: 'c' I can know there is a failure in f1() but line and other specifics are dropped changing line #25 to call f1() gives a better message, so it's something related to stack frame. Is there any way (aside from adding logging at each level to internet/defer.py:_inlineCallbacks) to get a better error message in py3? thank you - Aaron

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[Twisted-Python] How to call super() using attrs?
by Felipe Dau 20 Jun '17

20 Jun '17

I am trying to use attrs in a class that inherits from Thread but I have not found a way to call super(): >>> @attr.s ... class T(Thread, object): ... def __attr_post_init__(self): ... super(T, self).__init__() ... >>> t = T() >>> t.start() Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python2.7/threading.py", line 737, in start raise RuntimeError("thread.__init__() not called") RuntimeError: thread.__init__() not called I even tried to call that in __attr_post_init__(), but maybe super() should be called in a pre-init method? Thanks, -Felipe

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com 18 Jun '17

18 Jun '17

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[Twisted-Python] Wrong certificate for speed.twistedmatrix.com?
by ex vito 16 Jun '17

16 Jun '17

To the Twisted infrastructure maintainers, First and foremost, thanks for your continued efforts and keeping things running. Second, the certificate I'm getting for https://speed.twistedmatrix.com is issued to a common name "twistedmatrix.com" with no subject alternative names matching "speed.twistedmatrix.com". I suspect this may be improved in the future. My 2c after reading and following the links in the new wiki entry at https://twistedmatrix.com/trac/wiki/Coverage Cheers, -- exvito

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[Twisted-Python] Notice of future removal of Python 3.3 and 3.4 support in Twisted
by Amber Hawkie Brown 16 Jun '17

16 Jun '17

As per our Compatibility Policy (https://twistedmatrix.com/documents/current/core/development/policy/compati… <https://twistedmatrix.com/documents/current/core/development/policy/compati…>), this is an announcement that Twisted will be officially dropping support for Python 3.3 and Python 3.4 in the release after next. We currently have no 3.3 or 3.4 builders except on Travis, so these Python versions aren't really "fully supported" per our policy, as no current version of the distributions we test against ship it. However lack of support is different from explicitly dropping support, and so in Twisted 17.5 + two versions, we will be removing compatibility hacks for supporting 3.3 and 3.4, and focusing on 3.5+. - Amber

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Re: [Twisted-Python] Follow on release to Twisted 17.5.0
by Craig Rodrigues 14 Jun '17

14 Jun '17

Yes, without this fix it is broken on python 2 also. -- Craig On Wed, Jun 14, 2017 at 2:04 AM, Pierre Tardy <tardyp(a)gmail.com> wrote: > Oh. they are broken for python2 as well? > > That's would be pretty bad. > > > On Wed, Jun 14, 2017 at 10:36 AM Craig Rodrigues <rodrigc(a)crodrigues.org> > wrote: > >> Hi, >> >> Can you do a follow-on release to 17.5.0 which incorporates >> https://github.com/twisted/twisted/pull/816 >> >> Without that fix, e-mail notifications from buildbot are broken in >> buildbot's master branch. >> >> With that fix, e-mail notifications from buildbot now work on Python 2 >> and Python 3. >> >> Thanks. >> -- >> Craig >> >

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[Twisted-Python] Follow on release to Twisted 17.5.0
by Craig Rodrigues 14 Jun '17

14 Jun '17

Hi, Can you do a follow-on release to 17.5.0 which incorporates https://github.com/twisted/twisted/pull/816 Without that fix, e-mail notifications from buildbot are broken in buildbot's master branch. With that fix, e-mail notifications from buildbot now work on Python 2 and Python 3. Thanks. -- Craig

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com 11 Jun '17

11 Jun '17

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[Twisted-Python] Twisted 17.5 Release Announcement
by Amber Hawkie Brown 11 Jun '17

11 Jun '17

On behalf of Twisted Matrix Laboratories, I am honoured to announce the release of Twisted 17.5! The highlights of this release are: - twisted.python.url has been spun out into the new 'hyperlink' package; importing twisted.python.url is now a compatibility alias - Initial support for OpenSSL 1.1.0. - Fixes around the reactor DNS resolver changes in 17.1, solving all known regressions - Deferred.asFuture and Deferred.fromFuture, to allow you to map asyncio Futures to Twisted Deferreds and vice versa, for use the with Python 3+ asyncioreactor in Twisted - Support for TLS 1.3 ciphersuites, in advance of a released OpenSSL to enable the protocol - Further Python 3 support in twisted.web, initial support in twisted.mail.smtp. For more information, check the NEWS file (link provided below). You can find the downloads at <https://pypi.python.org/pypi/Twisted <https://pypi.python.org/pypi/Twisted>> (or alternatively <http://twistedmatrix.com/trac/wiki/Downloads <http://twistedmatrix.com/trac/wiki/Downloads>>). The NEWS file is also available at <https://github.com/twisted/twisted/blob/twisted-17.5.0/NEWS.rst <https://github.com/twisted/twisted/blob/twisted-17.5.0/NEWS.rst>>. Many thanks to everyone who had a part in this release - the supporters of the Twisted Software Foundation, the developers who contributed code as well as documentation, and all the people building great things with Twisted! Twisted Regards, Amber Brown (HawkOwl)

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[Twisted-Python] (no subject)
by Justin Myles Holmes 07 Jun '17

07 Jun '17

Hey friends. I feel reasonably confident that Twisted is on the cusp of a big renaissance. It represents a lot of what I want communications syntax to feel like, and the metaphors I think are reasonble for representing it, in the future of Python. I consider myself now somewhere between a user and a power-user, but I have repeatedly failed to find a road to become a successful, consistent contributor. I count several of you (Glyph, Hawkowl, Itamar, Habnabit, among others) as among friends and formative influences. How can I help you with Twisted? How can you help me move over the cusp into active, useful contribution? -- Justin Myles Holmes http://github.com/jMyles/

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