Mailman 3 January 2012 - Twisted

[Twisted-Python] Extending twisted.words.protocols.irc
by Matthew Pounsett 26 Jan '12

26 Jan '12

I've written some methods for twisted.words.protocols.irc.IRCClient that seem like they (or something like them) should be part of the main distribution. What's the preferred way to pass those along for consideration? Posting here? Open a ticket on the tracker? If the latter, should I send them all as one batch, or separate them into related chunks? Thanks!

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[Twisted-Python] http.Request and JSON
by Vincent Gulinao 25 Jan '12

25 Jan '12

How do you read JSON content from a POST using http.Request. I peeked on args and it's empty. TIA.

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[Twisted-Python] Twisted Sprint at PyCon 2012
by exarkun＠twistedmatrix.com 25 Jan '12

25 Jan '12

Hello all, The past few years have seen the Twisted sprint at PyCon grow to a very impressive size. With expectations that this will be the largest PyCon yet, I have no reason to expect that the trend will be reversed this year. I have "run" the sprint for the past two years, though in practice there are not many duties associated with that post. This year, I need to hand off that responsibility to someone else, as I will only be attending the sprints for the first day. "Running" a PyCon sprint involves interfacing with the PyCon organizers to get a room assignment. Beyond that, all that's really necessary is to keep your eyes open for things that might be impeding the work of sprinters (yourself included, as these duties should not take up more than about 2% of your time). If you're interested in taking this on, please let me know. Let me know which days you'll be attending the sprints (preferably you'll be attending all days, but missing the last day or two might not disqualify you). Thanks! Jean-Paul

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[Twisted-Python] Multiple callbacks
by Tech Aficionado1743 25 Jan '12

25 Jan '12

Hello, can anyone help ? i can't understand why, in the piece of code below (S1), the parameter (grid) passed to the callback is the same, while i have 2 grid, 2 deferred and 2 lambda. The source S2 is working (2 different grid), but inelegant... Thank you. #----------- S1 ------------------------ def OnSubscribe(self): for pool, grid in self.grids.items(): print 'grid = ',grid d = self.frame.dbpoolMiddle.runQuery(allSelect.stmts['Set0'], (pool, self.frame.ctxName)) print 'deferred = ', d f = lambda _:self.gotDataBin(_, grid) print 'lambda =', f d.addCallback(f) def gotDataBin(self, result, grid): print 'callback = ', grid grid.ReplaceRowsFromSQL(result) #----------- Output S1 ---------------- grid = <cfm.wx.CfmGrid.CfmGrid; proxy of <Swig Object of type 'wxGrid *' at 0x2d61b48> > deferred = <Deferred at 0x2e6bd28> lambda = <function <lambda> at 0x02DCDCF0> grid = <cfm.wx.CfmGrid.CfmGrid; proxy of <Swig Object of type 'wxGrid *' at 0x2d5e788> > deferred = <Deferred at 0x2e6bdc8> lambda = <function <lambda> at 0x02DCDCB0> callback = <cfm.wx.CfmGrid.CfmGrid; proxy of <Swig Object of type 'wxGrid *' at 0x2d5e788> > # expected to get 1st grid here: 0x2d61b48, not two times 2nd grid callback = <cfm.wx.CfmGrid.CfmGrid; proxy of <Swig Object of type 'wxGrid *' at 0x2d5e788> > #----------- S2 ------------------------ def OnSubscribe(self): for pool, grid in self.grids.items(): d = self.frame.dbpoolMiddle.runQuery(allSelect.stmts['Set0'], (pool, self.frame.ctxName)) def toto(grid): d.addCallback(lambda _:self.gotDataBin(_, grid)) toto(grid) def gotDataBin(self, result, grid): print 'callback = ', grid grid.ReplaceRowsFromSQL(result)

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[Twisted-Python] [Twisted-Jabber] [ANNOUNCE] Wokkel 0.7.0
by Ralph Meijer 24 Jan '12

24 Jan '12

Hi! I am proud to announce version 0.7.0 of Wokkel, a set of enhancements on the Jabber/XMPP support in Twisted Words. http://wokkel.ik.nu/releases/0.7.0/wokkel-0.7.0.tar.gz The highlights: * Protocol support for Publish-Subscribe subscription options, subscription identifiers and node configuration options. * Enhancements to Data Forms support for easier creation of forms to be submitted, and (type) verification of forms that are received. * A twistd plugin for running a basic XMPP server which accepts server-side components connections and provides server-to-server (dialback) connectivity. * Support for the Delayed Delivery data format. * Client-side support for Multi-User Chat, including a simple example. Besides those new features, various bugs have been resolved and test coverage has been significantly improved. This release drops support for Twisted versions before 10.0.0. See the complete news file at: http://wokkel.ik.nu/releases/0.7.0/NEWS With this release out of the way, my focus for this year will be on moving things from Wokkel to Words. Jabber on! -- ralphm

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[Twisted-Python] Twisted 12.0.0pre1 is here!
by Thomas Hervé 23 Jan '12

23 Jan '12

Hello there Twisted people, Reading that title, I hear you saying: "Already?". But yes, now is already the time to test a freshly released version of Twisted. You can find the carefully prepared tarballs here: http://people.canonical.com/~therve/Twisted/12.0.0pre1/ 47 tickets are closed by this release, among them: * A fix to the GTK2 reactor preventing unnecessary wake-ups (#4376) * Preliminary support of IPV6 on the server side (#5084) * Several fixes to the new protocol-based TLS implementation * Improved core documentation's main page (#5429) Please run your application/library/framework tests against it! New-year-resolution-ly yours, -- Thomas

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[Twisted-Python] How to be sure a ssl connection was completed correctly
by Hanusz L. 23 Jan '12

23 Jan '12

Hi, I'm using the pull method to send events to clients (with xmlrpc over ssl). The events are in a queue and when a client calls my 'get_event' xmlrpc function; I get one event from the queue and send it to the client. The problem is that I want to be sure that the client receives all the events. Is it correct to assume that: IF the method connectionLost of my protocol (the wrapped protocol of the ssl protocol) is called with a failure(error.ConnectionDone()) THEN the connection was completed successfully and the client received the event correctly ? Thanks, Leszek ##################################################################################### This e-mail message has been scanned for Viruses and Content and cleared by Mailsecurity software #####################################################################################

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[Twisted-Python] Announcing MV3D 0.70!
by Michael Handverger 23 Jan '12

23 Jan '12

I am pleased to announce the release version 0.70 of MV3D! This release includes a massive amount of new features and over 70 bugfixes. The main focus was on usability and involved a large amount of work on tools. In 0.70, Panda3D support was brought up to par with animation, terrain texture splatting, and skydomes. One of the things we are most excited about is the Windows development environment installer. This is an easy installer that will quickly set up any Windows system to develop MV3D. If you've been watching the project and want to get involved, there's no better time! MV3D is an open source multiplayer game and virtual world framework written in Python which uses Twisted for networking. It encompasses a scalable server with dynamic load balancing, a robust set of content creation tools, and an extensible 3D client application. MV3D provides the foundation to build anything from 3D chat rooms to full MMORPGs with the goal of letting you concentrate on creating a unique virtual world instead of the infrastructure to support it. For more information on MV3D and this or future releases, please visit the website at http://www.mv3d.com . The full release notes for version 0.70 are available online at this URL: http://www.mv3d.com/trac/browser/tags/mv3d-0.70/release-notes.txt . For further inquiries, feel free to stop by our IRC channel on irc.freenode.net #MV3D. New screenshots of our demo world and the Composer tool: http://www.mv3d.com/trac/screenshots/46 http://www.mv3d.com/trac/screenshots/47 Release 0.75 will be focused on bugfixing and adding full support for Linux + Ogre and OS X + Panda. We are currently looking for help porting and testing on these platforms. Let me know if you are interested! Enjoy, Mike

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[Twisted-Python] Finding out the IP which it failed to connect
by Facundo Batista 22 Jan '12

22 Jan '12

I have some code that uses a twisted.web.client.HTTPClientFactory. I've found that because some issues (firewall rules, not relevant to the problem), I experienced failures to connect. More specifically, I told it to connect to one particular address, and because of DNS load distribution, that address converted to several different IPs, and one of that IPs was not open, so it failed to connect with a TCPTimedOutError (code 110). When it failed to connect, it executed the "clientConnectionFailed" method of HTTPClientFactory, which receives a twisted.internet.tcp.Connector instance, and the reason of the failure. The question is: Is there a way, at that point (when clientConnectionFailed is called), to find out *to which IP* it failed to connect? Thank you very much! -- . Facundo Blog: http://www.taniquetil.com.ar/plog/ PyAr: http://www.python.org/ar/

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[Twisted-Python] Python multiprocessing and Twisted stopService - success story
by Tom Sheffler 22 Jan '12

22 Jan '12

We are using Py2.6's multiprocessing with Twisted and things are working nicely. I thought I'd pass on something that seems to work pretty well. Comments welcome. I am using multiprocessing to spawn long-running worker processes as children of Twisted. When Twisted is killed, I want the children to be unceremoniously killed as well. I looked into signal handlers, but creating a service that kills the child processes ended up being simpler and is working well with twistd daemonization. class MultiprocessingStopService(Service): def stopService(self): import multiprocessing for p in multiprocessing.active_children(): p.terminate() Service.stopService(self) and in my main service maker: s = MultiService() stopper = MultiprocessingStopService() stopper.setServiceParent(s) Perhaps this will be helpful to someone. -T

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