Mailman 3 March 2014 - Twisted

[Twisted-Python] Buildbot downtime
by Tom Prince March 3, 2022

March 3, 2022

I am plannig to upgrade twisted's buildbot in the near future. In preperation for that, I am going to take down the production buildbot on Tuesday, June 26, around 1600 UTC[1]. During that time, the result of any builds done will be lost. Thus, I'd ask that people avoid committing to trunk during that time. I will send a reminder before I take down the buildbot both here, and on #twisted and #twisted-dev. Tom [1] http://timeanddate.com/worldclock/meetingtime.html?iso=20120626&p1=80&p2=22…

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[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz Aug. 5, 2021

Aug. 5, 2021

hi there, folks: I'd really like to release 0.7.0 but I would like it to be at least a little bit tested before I do so. Could those of you with CVS trees check everything out and see if it performs as advertised? Deeper bugs than that will have to wait for the next release, but I'd at least like to know if it works for someone other than me. Thanks. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |… [View More]

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by Tamika May 1, 2019

May 1, 2019

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[Twisted-Python] Better usage of Twisted on multi core processor
by Sumanth Puram March 13, 2015

March 13, 2015

Hi all, I have a twisted TCP server to listens to client, processes requests, do mysql database operations if needed (using adbapi Connection pool) and return the result. Before deploying this in production, I want to know right way to configure the server. Since twisted is single threaded, how can I leverage multiple cores of my production machine (which has 6 cores and 16 GB RAM) ? One approach that I thought of was to start multiple instances of twisted server on different ports. This … [View More]

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[Twisted-Python] [ANN] txZMQ released
by Andrey Smirnov July 21, 2014

July 21, 2014

Hi! I would like to announce txZMQ, ZeroMQ bindings for Twisted. txZMQ is based on pyzmq and requires recent ØMQ version (>=2.1). txZMQ uses ØMQ APIs to get file descriptor that is used to signal pending actions from ØMQ library IO thread running in separate thread. txZMQ should be usable with any Twisted reactor. ØMQ is: * The socket library that acts as a concurrency framework. * Carries messages across inproc, IPC, TCP, and multicast. * Connect N-to-N via fanout, pubsub, pipeline,… [View More]

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[Twisted-Python] Distributing apilinks.py
by Adi Roiban May 11, 2014

May 11, 2014

Hi, Right now apilinks.py is located in Twisted at docs/_extensions/apilinks.py, but a copy can also be found in pydoctor project. While reporting a bug for apilinks.py in Twisted I was ask to send the patch upstream in pydoctor [1] During the review of the patch in pydoctor, pydoctor's maintainer agreed that there should be a single copy of this file but don't know what's involved in achieving that. [2] Can someone involved in using apilinks.py in Twisted provide some feedback regarding … [View More]

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[Twisted-Python] which async framework?
by Chris Withers April 10, 2014

April 10, 2014

Hi All, Apologies for the cross-post, but this is a "which framework" question so seemed the most constructive way. Not interested in religious debates, just trying to pick the best tool for the job and didn't get much of a useful response from python-list... So, I see python now has a plethora of async frameworks and I need to try and pick one to use from: - asyncio/tulip - tornado - twisted From my side, I'm looking to experimentally build a network testing tool that will need to … [View More]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com March 30, 2014

March 30, 2014

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[Twisted-Python] stmp client with multipart
by Kevin Mcintyre March 29, 2014

March 29, 2014

How can I get something similar into a smtp client 12? multipart message fn = "example.mp3" multipart = MIMEMultipart('alternative') multipart['Subject'] = 'Tutorate!' multipart['To'] = 'Selfie' multipart['From'] = 'Selfie' text = "Hello, how are you, goodbye." textpart = MIMEText(text) multipart.attach(textpart) htmlpart = MIMEText("<html>" + text + "</html>", 'html') multipart.attach(htmlpart) part = MIMEBase('audio', "mp3") part.… [View More]

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[Twisted-Python] a reminder about Deferreds in tests
by Glyph Lefkowitz March 27, 2014

March 27, 2014

I'm not sure if we've written this down anywhere official-looking, but if you're writing new tests in Twisted today, there is no reason that they should ever return a Deferred. Returning Deferreds from tests in Trial is useful _only_ for writing integration tests that rely on external services which cannot be reasonably implemented or faked within Twisted itself. In some applications, this is an unfortunate fact of life, which is why Trial provides the feature and will continue to provide it. … [View More]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com March 23, 2014

March 23, 2014

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[Twisted-Python] git?
by Chris Withers March 20, 2014

March 20, 2014

Hi All, Is there a git mirror of the twisted repo anywhere? Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk

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[Twisted-Python] Twisted 14.0.0-pre1 Announcement
by HawkOwl March 19, 2014

March 19, 2014

I am pleased to announce that the first prerelease of Twisted 14.0 is hot off the code presses for testing! Tarballs for this prerelease can be found at <http://twistedmatrix.com/Releases/pre/14.0.0pre1>, with the changelog at <http://twistedmatrix.com/Releases/pre/14.0.0pre1/NEWS.txt>. Highlights include: -Twisted Positioning (`twisted.positioning`) makes its entry into Twisted! It comes ready to talk with common GPS devices, and will supersede `twisted.protocols.gps`. - A … [View More]

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[Twisted-Python] Twisted 14.0.0-pre1 Announcement
by HawkOwl March 19, 2014

March 19, 2014

I am pleased to announce that the first prerelease of Twisted 14.0 is hot off the code presses for testing! Tarballs for this prerelease can be found at <http://twistedmatrix.com/Releases/pre/14.0.0pre1>, with the changelog at <http://twistedmatrix.com/Releases/pre/14.0.0pre1/NEWS.txt>. Highlights include: -Twisted Positioning (`twisted.positioning`) makes its entry into Twisted! It comes ready to talk with common GPS devices, and will supersede `twisted.protocols.gps`. - A … [View More]

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[Twisted-Python] Getting the options object from the service
by Jonas Brunsgaard March 18, 2014

March 18, 2014

Hello Everybody What is the prefered way to get the options object from the servicemaker when using twistd plugins. I guess i could access the object via from twisted.plugins.my_plugin import myServiceMaker options = myServicemMaker.options But is there a better way to do it? Somthing like from somwhere import get_service_config() options = get_service_config() All the best -- Brunsgaard

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[Twisted-Python] object identify and lifecycle in pb
by Daniel Sank March 18, 2014

March 18, 2014

Dear Twisted users, I have been writing a developer library under pb and I've come to a problem that I don't know how to solve. I suspect folks here will have dealt with similar problems so I want to get your advice. This is a long post so I've put specific questions on their own lines. Suppose we're part of a society of spies. We desire to possess top secret Widgets. Widgets can be purchased from a black market, or obtained from other spies. Suppose we implement this by having Widget inheret … [View More]from pb.Cacheable. When I buy a Widget from the black market I am passed a pb.RemoteCache of that Widget. We use Cacheable so that when the Widget receives a top secret message, my RemoteCache is notified of the message. Now suppose I give my Widget to my trusted co-spy Glyph. On the network this is implemented by passing Glyph a RemoteCache of that Widget and by remembering to stop updating my RemoteCache, since I'm no longer in posession of the Widget. This could be done simply by keeping a .owner attribute on the Widget so that it knows whos RemoteCache to update when secret messages come in. Now suppose it turns out Glyph is a traitor and secretly gives the Widget to Mr. Evil. Again, the Widget's .owner attribute changes and everything seems hunky dory. The problem comes in when I infiltrate Mr. Evil's castle and steal the Widget. The server passes me a reference to the Widget which, because of the way pb works, I can immediately identify as the same widget I originally gave Glyph, allowing me to identify him as a traitor. This is bad because my ability to trace the Widget comes from pb, not from my own decision to give (or not give) the Widgets distinguishing characteristics. Q1: Is there a simple solution to this problem? My idea is to have each Widget implemented as a vanilla object that knows nothing about pb or the network, but which can (through extension in a subclass) create pb objects as users need them. The problem I'm having with that idea is that I haven't figured out a reasonable to distribute the network layer objects, particularly in cases in which objects "contain" one another. Let's try an example. First we have a vanilla Widget class Widget(object): def __init__(self): owner = None def receiveMessage(self, msg): print("Widget received message: %s"%(msg,)) Next we need to extend this object so that it can spawn and interact with network-layer objects. To do this we add two features 1) We use a decorator that allows methods to notify other observing methods when they are run. For a possible implementation see the "obsub" module on PyPI. I have my own implementation for reasons. 2) We add a method that spawns network layer objects. class FeaturefulWidget(Widget): networkClass = WidgetNetwork @event #Allows other bound methods to observe this method def receiveMessage(self, msg): return Widget.receiveMessage(self, msg) def makeNetworkModel(self): return self.networkClass(self) def addCallback(self, methodName, callback): """ Sign up a callback to be invoked when a method decorated by @event is called methodName: the name of the method to be observed on the present object. callback: The thing to call when methodName is invoked. """ <just trust me that this works> Now we can make the actual cacheable object, class WidgetNetworkModel(pb.Cacheable): def __init__(self, obj): self.obj = weakref.proxy(obj) # Sign up our receiveMessage method to be called whenever # obj.receiveMessage is called. obj.addCallback("receiveMessage", self.receiveMessage) # The usual set of observers needed by a pb.Cacheable self.observers = weakref.WeakKeyDictionary{} #perspective -> observer def getStateToCacheAndObserveFor(self, perspective, observer): self.observers[p] = observer # Get state data from the actual object return {'some key': self.obj.someData, etc.} def receiveMessage(self, msg): for p in self.observers: <possibly decide whether p should know about this message> self.observers[p].callRemote("receiveMessage", msg) and its remote cache, class WidgetRemoteCache(pb.RemoteCache): def setCopyableState(self, state): for k, v in state.items(): setattr(self, k, v) def observe_receiveMessage(self, msg): print("Top secret message received: %s"%(msg,)) In an application we would work most directly with FeaturefulWidget. When a user gets its hands on a particular instance of FeaturefulWidget called myWidget, we would either pass or return myWidget.makeNetworkModel(). Q2: Is there a good mental framework we can use to decide when to make new network models and when to pass multiple remote references to the same one? Q3: We had a line in getStateToCacheAndObserveFor where we put self.obj.someData in a dict to pass over the wire. In many cases objects will contain other objects that should be networkified before they can be passed over the wire. Certainly we can manually put self.obj.someData.makeNetworkModel() into the dict as necessary, but I wonder if there's a nice way to handle this sort of thing. Thanks! Daniel [View Less]

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[Twisted-Python] Contributing documentation inside CONTRIBUTING repo file
by Adi Roiban March 17, 2014

March 17, 2014

Hi. Right now CONTRIBUTING file from twisted repo sends developers to: https://twistedmatrix.com/trac/wiki/ContributingToTwistedLabs What do you think about having basic contributing documentation inside the repo? I am talking about these 2 pages: https://twistedmatrix.com/trac/wiki/BasicGuideToContributingCode https://twistedmatrix.com/trac/wiki/TwistedDevelopment Commiters Check list can be left on the wiki page: https://twistedmatrix.com/trac/wiki/CommitterCheckList -------- I think … [View More]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com March 16, 2014

March 16, 2014

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[Twisted-Python] ANN: Crochet 1.1.0
by Itamar Turner-Trauring March 14, 2014

March 14, 2014

Crochet is an MIT-licensed library that makes it easier for blocking or threaded applications like Flask or Django to use the Twisted networking framework. Crochet provides the following features: * Runs Twisted's reactor in a thread it manages. * The reactor shuts down automatically when the process' main thread finishes. * Hooks up Twisted's log system to the Python standard library logging framework. Unlike Twisted's built-in logging bridge, this includes support for … [View More]

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[Twisted-Python] Freezing Ampoule or the Invasion of Infinite Zombie Processes
by Burak Nehbit March 14, 2014

March 14, 2014

Hi everyone, It seems that I ran into a rather inextricable problem, would love to see what you think. As you might remember, I have been working on a distributed, anonymous community platform(s) called Aether ( www.getaether.net ) which is largely a Twisted codebase in its networking system. After releasing the app, I ended up with performance problems, in some part due to my programming incompetence, and some part because I was also using it to drive a GUI with qtreactor, which ran … [View More]its own Javascript interpreter. The codebase is largely cleaned up now and the current architecture of the program involves two processes that talk to each other via Ampoule: a default reactor core, which handles network events, and a qtreactor which is solely concerned with the user interface. It works very well. Stress induced by networking does not slow down the UI and vice versa. The problem here is that I can’t freeze and package the app via PyInstaller to release it. What happens is that when I run the packaged application, the application starts to spawn an infinite amount of copies of itself. This seems to be the default behaviour of Ampoule, in when a worker process (my GUI) fails, it spawns a new one. 1) How can I disable this feature? I want ampoule to not restart a failed worker process. 2) How can I get information about what’s going wrong in the worker process? I am using a custom bootstrap code, and it seems that even if I deliver an empty bootstrap code to make it a noop, the process still fails and a new one is spawned. Or to be more accurate, just a new process is spawned, I don’t know whether if it is failing, but nothing happens on spawned processes, none of them start to show GUI or any other signs of life. If I don’t force quit my frozen app, it will create an increasing number of zombie processes. I have Twisted logging set up in the GUI process, but it doesn’t even hit that line, so I get no exceptions or any message of any kind. It fails even with empty bootstrap code. Any idea on how to approach this problem? I have nothing to start with , so anything would be appreciated. I’m reading the source code of Ampoule but found nothing useful so far. The non-frozen version of the app works fine. I also have a prior version of the app that can be packaged, so there’s nothing wrong with my Twisted code that can’t be packaged. It’s Ampoule that is newly added, and so far resisting the refrigerator. Best regards, Burak [View Less]

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[Twisted-Python] Simple way to halt all timers?
by Russell E. Owen March 13, 2014

March 13, 2014

Is there a simple way to cancel all Twisted timers (pending reactor.callLater calls)? The reason I want to do this is to clean up a unit test without getting "dirty reactor" complaints. The system is a server that will rarely be shut down and does not have to shut down gracefully (i.e. I don't care if the reactor is dirty). But I want the unit tests to run cleanly, so for now I've been keeping a reference to each timer that I start, so my test cleanup code can manually cancel it. It's … [View More]

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[Twisted-Python] Tor Project has GSoC projects which need Twisted developers!
by isis March 13, 2014

March 13, 2014

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Heyo Twisted Python peoples! Google recently accepted The Tor Project into their 2014 Google Summer of Code program. [0][1] We have several GSoC project ideas which include development tasks using Twisted, for example: * Design and develop better Pluggable Transports [2] * Contribute to better parsing integration between Stem and Txtorcon [3] * Design and develop a new Tor bridge distributor for BridgeDB [4] * Develop a censorship … [View More]analyzer [5] Or feel free to submit a GSoC application for another idea, and we'll try to find a mentor for you. GSoC is a great way to not only get paid for contributing to FLOSS projects, but also to get involved and familiar with the Tor Project. Several current Tor developers were once-upon-a-time GSoC students. Hope to see your applications soon! :) [0]: https://blog.torproject.org/blog/tor-google-summer-code-2014 [1]: https://www.google-melange.com/gsoc/homepage/google/gsoc2014?ModPagespeed=n… [2]: https://www.torproject.org/getinvolved/volunteer.html.en#betterPluggableTra… [3]: https://www.torproject.org/getinvolved/volunteer.html.en#txtorcon-stemInteg… [4]: https://www.torproject.org/getinvolved/volunteer.html.en#newBridgeDBDistrib… [5]: https://www.torproject.org/getinvolved/volunteer.html.en#censorshipAnalyzer - -- ♥Ⓐ isis agora lovecruft _________________________________________________________ GPG: 4096R/A3ADB67A2CDB8B35 Current Keys: https://blog.patternsinthevoid.net/isis.txt -----BEGIN PGP SIGNATURE----- iQMhBAEBCgELBQJTIfqxBYMB4TOAVhSAAAAAACUAKGlzaXMrc2lnbnN1YmtleUBw YXR0ZXJuc2ludGhldm9pZC5uZXRGQzYzQUE1Q0QxOTM4NjlDMzIzNzE0NUE1QzE3 Nzc2RTI3RjdFODRESxSAAAAAABoAKGlzaXNAcGF0dGVybnNpbnRoZXZvaWQubmV0 MEE2QTU4QTE0QjU5NDZBQkRFMThFMjA3QTNBREI2N0EyQ0RCOEIzNS4aaHR0cHM6 Ly9ibG9nLnBhdHRlcm5zaW50aGV2b2lkLm5ldC9wb2xpY3kudHh0LJhodHRwczov L2Jsb2cucGF0dGVybnNpbnRoZXZvaWQubmV0L2lzaXMudHh0AAoJEFwXd24n9+hN 028P/0TNIvBVus2nI+KBTUh5JLyDrG3+C3Unf+MS4N6IkJmL0x1+oGw0R4WgqhCv lJPYvkdr06qcCAsDaOsv/n5v6yyvSxFbVVGftPffqmhe6u952mvDSaYHx05v5f4M pc8+Wss4gyA5KtVuttWqr2QfdNEpoUXtGUHJCREQHU/PiuUEn6sNPx88by3WBKjB jqhX7oEMBrB3cakYXYnZZO0VjoqRHf0PafJrpLaBdkOSezbPqKm40dIZ8v8axXzi /e2d6FLT0D3wDzj1c/4kfRDZIogL83Q4VaIZvT+YpADeEGonzB2uQGqB75OWWkVk +lwJW2saKzQEc0E+iBa2fLDiYLHiauVN1epRrj9EPuXfbte4fn2ntQf6Cr+dVuAM RKfN6HquKCDaW2mY50xOEzawYfPYWJJxDnjG5i2+Wy4N479b9DxmqxpsIBmlElpa 9qPnY9M33doAARx1FDJn39OyynHMMvoD65hBa4ZMzSFTyu8xEhTO9s/NXiRKr8K2 SqZjh9xywNeOiFrPaFB3G+/T8JZGyjsURPIWs9WuGFtOI5SLob7B6K7IpVJG2XGB eeJCrk2KtvpwhPdw561cZHT8V8tHlcBzhV/hsbfbtXlFFFlfkWsdf/BI76AIEKXc 4yjlmAPg9Tlul+AYle3byBTDYDwjN+vgIpn9vKbvGvNnMCtY =S2Nq -----END PGP SIGNATURE----- [View Less]

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[Twisted-Python] building offline docs
by Chris Withers March 12, 2014

March 12, 2014

Sorry, more questions... Unfortunately, most of the time I have for learning and research is offline. How can I build the docs for browsing (html) from a subversion checkout? Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk

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[Twisted-Python] ping?
by Chris Withers March 12, 2014

March 12, 2014

Sorry, not sure mail is getting through from the list... -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk

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[Twisted-Python] Work around pyflakes errors
by Adi Roiban March 10, 2014

March 10, 2014

I would like to see twisted code base free of pyflakes errors. In this way, when someone sees pyflakes errors in his/her branch will know for sure that those errors are generated by changes in that branch. Also developers could run pyflakes on local computers, before sending a patch and have instance feedback for pyflakes errors. One problem is that pyflakes will complain about unused imports. JP suggested a fix for that and I have created a ticket: https://twistedmatrix.com/trac/ticket/7014… [View More]

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