Mailman 3 April 2015 - Twisted

[Twisted-Python] Adding support for Diameter protocol
by Hamza Sheikh 15 Apr '15

15 Apr '15

I am new to Twisted and its community and exploring adding Diameter support. I have experience with Python but as I learn more I realize how little I know. This is my first foray contributing to a real open source project. I'm basically looking for mentors to guide me when I have questions about: * Async code * Wiring code to support both Python 2.x and 3.x * Style guides * Other things If dedicated mentors are hard to come by I'd be grateful for this ML to help with answers. Looking forward to working with the community on a great project. -- Hamza "@aikchar" Sheikh

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[Twisted-Python] Twisted 15.1 Release Announcement
by HawkOwl 15 Apr '15

15 Apr '15

On behalf of Twisted Matrix Laboratories, I am honoured to announce the release of Twisted 15.1.0 -- just in time for the PyCon sprints! This is not a big release, but does have some nice-to-haves: - You can now install Twisted's optional dependencies easier -- for example, `pip install twisted[tls]` installs Twisted with TLS support. - twisted.web.static.File allows defining a custom resource for rendering forbidden pages. - Twisted's MSN support is now deprecated. - More documentation has been added on how Trial finds tests. - ...and 26 other closed tickets containing bug fixes, feature enhancements, and documentation. For more information, check the NEWS file (link provided below). You can find the downloads at <https://pypi.python.org/pypi/Twisted> (or alternatively <http://twistedmatrix.com/trac/wiki/Downloads>) . The NEWS file is also available at <https://github.com/twisted/twisted/blob/releases/release-15.1.0-7758/NEWS>. 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, Hawkie Owl

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[Twisted-Python] [ANN] pyOpenSSL 0.15
by Hynek Schlawack 14 Apr '15

14 Apr '15

Greetings fellow Pythoneers, I'm happy to announce that pyOpenSSL 0.15 is now available. pyOpenSSL is a set of Python bindings for OpenSSL. It includes some low-level cryptography APIs but is primarily focused on providing an API for using the TLS protocol from Python. Check out the PyPI page (<https://pypi.python.org/pypi/pyOpenSSL>) for downloads. *** This is the last release under the stewardship of Jean-Paul Calderone and the maintainership is now taken over by the Python Cryptography Authority (PyCA) which has been developing the C-bindings for pyOpenSSL for a while (aka cryptography). We’d like to thank him for his great work over the past years and hope to be able to keep moving the project into a direction that will make him only slightly sad. *** The highlights of this release include: - Support to ECDHE, - NPN and ALPN support, - …many bug fixes! It’s worth pointing out that OpenSSL functions generally work on *byte strings* because they mirror OpenSSL APIs and OpenSSL is not Unicode-aware. Passing Unicode strings tends to accidentally work due do implicit decodes on Python 2 but they emit a DeprecationWarning now. Please note that DeprecationWarnings are silenced by default on Python 2.7. See the ChangeLog at <https://github.com/pyca/pyopenssl/blob/0.15/ChangeLog> for more details! On behalf of PyCA, Hynek Schlawack

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com 12 Apr '15

12 Apr '15

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[Twisted-Python] Twisted dinner at PyCon tonight (4/11)?
by Ashwini Oruganti 11 Apr '15

11 Apr '15

Everyone is invited! Let's meet near the registration desk at 6:30pm Pullman 3424, Avenue du Parc Montreal, QC H2X 2H5 Canada (514) 288-7779 http://www.yelp.com/biz/pullman-montr%C3%A9al-3 -Ashwini

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[Twisted-Python] Windows CFFI Implementation?
by Oliver Palmer 08 Apr '15

08 Apr '15

Hi, I've been using Twisted for a while now and for the most part I've been quite pleased with it. Perhaps the one exception to this is when it comes to Windows, but that's only because of pywin32. For those unaware, there's essentially two options right now. Install pywin32 manually or add the pypywin32 package to your project as a requirement. So long as the wheel package is installed...it's pretty easy to work around pywin32's installer issues. But, I wouldn't mind if the pywin32/wheel+pypiwin32 requirements went away on Windows. Pywin32 can be difficult to get working sometimes and it's unfortunate that the Windows install can sometimes require a couple of manual steps when working with Twisted. So far as I can tell, Twisted itself does not use a great deal of the pywin32 library and there's even a ticket open that seems to indicate it's on the list of things to eventually do and it's been mentioned at least a few times outside of this ticket: https://twistedmatrix.com/trac/ticket/7477 So my question is, does anyone know if any work has been done along the lines of removing the pywin32 dependency and converting to cffi? Outside of the link above, I'm not seeing much so far and based on some rudimentary testing <https://github.com/opalmer/twisted/blob/02c0c56382f25b239fe177807541528cc94…> it seems like it's worth picking up since I've had to work around <https://github.com/pyfarm/pyfarm-agent/pull/250/files> this problem before. Would anyone object to me doing some work on this? I can't promise anything yet since I'm still investigating it but I figured it would be a good time to reach out for some input before moving forward. Thanks, Oliver Palmer

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[Twisted-Python] IRCClient (ircLogBot.py) send a message every 5 minutes
by Laurens Vets 07 Apr '15

07 Apr '15

Hello, I'm trying to get to know the Twisted framework by extending the ircLogBot.py example. I want to be able to get a list of all names in a channel (by sending NAMES) and I want to rerun this every 5 minutes. I've been able to get the NAMES on a channel join by doing this in LogBot: def joined(self, channel): self.names(channel) def names(self, channel): self.sendLine("NAMES %s" % channel) def irc_unknown(self, prefix, command, params): if command == 'RPL_NAMREPLY': self.handle_namereply(*params) def handle_namereply(self, myname, channeltype, channelname, users): self.logger.log("Handling namereply %r %r %r %r" % (myname, channeltype, channelname, users)) The problem I face is that I have no idea where to put a LoopingCall to run this same command every 5 minutes. Where would be the best place to place this? Thanks in advance!

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com 05 Apr '15

05 Apr '15

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[Twisted-Python] Twisted Project Job Posting
by exarkun＠twistedmatrix.com 05 Apr '15

05 Apr '15

Hello all, The Twisted issue tracker needs someone to pay attention to it for spam content and clean up that content. I've been taking care of this for a while now but I'm going to step back from this position soon. These days spam is primarily submitted as new tickets. When a spam ticket is filed, it needs to be deleted. There's a form in the trac web interface for deleting tickets. Access needs to be specially granted, so you need a trac account to volunteer for this role. Trac is configured with some automatic spam filtering software. It catches some, but obviously not all, spam submissions. The trac rss feed can be used to monitor new content for spam. Total time commitment for this job is pretty minimal (perhaps a few minutes a week) but timely action on spam is preferred. It's probably also possible for this responsibility to shared between multiple people (divided up however those people find works). I'll continue covering this role for another week but after that I'll stop - so please volunteer before then! Thanks, Jean-Paul

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[Twisted-Python] txaio: write code for both asyncio + twisted
by meejah 03 Apr '15

03 Apr '15

I recently factored some Twisted/asyncio compatibility code out of AutobahnPython (http://autobahn.ws/python/) and the result thus far is "txaio", available on GitHub: https://github.com/tavendo/txaio Similar to "six" (but for event-based Python) this allows you to write code (presumably for a library) that can work unmodified on either asyncio or Twisted. In other words, users of your library can choose whether they want a Twisted dependency or not (and, e.g., get plain Deferreds or Futures as appropriate from any async methods your API reveals). Basically, it's just a thin wrapper over the appropriate calls into asyncio or Twisted providing a "lowest-common-denominator" interface. This does mean limiting yourself a little (e.g. many DeferredList options aren't available). So you feel this pain as a library author, but then give *users* of your library a choice as to whether they wish to write asyncio (with no Twisted dependency) or Twisted. What I mean is: txaio isn't trying to be full event-loop interop like txtulip (https://github.com/itamarst/txtulip) This isn't "released" yet (e.g. not on PyPI) but I'm posting about it because I'm interested in any early feedback. Here's most of the API, using the example from the README: import txaio # auto-selects twisted > asyncio > trollius f0 = txaio.create_future() f1 = txaio.as_future(some_func, 1, 2, key='word') txaio.add_callbacks(f0, callback, errback) # either can be None txaio.add_callbacks(f1, callback, errback) # ... txaio.resolve(f0, "value") txaio.reject(f1, RuntimeError("it failed")) -- meejah

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