Mailman 3 April 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] Log level using Twistd
by Juan Antonio Ibañez Santorum May 4, 2014

May 4, 2014

Hello, I am trying to modify loglevel withou result. I configure my app logging inside the tac file as: logging.basicConfig(level=logging.ERROR, format="%(asctime)s --- %(name)s - %(levelname)s - %(message)s") logfile = DailyLogFile("gdumper.log", "/var/log") application.setComponent(ILogObserver, FileLogObserver(logfile).emit) logging.basicConfig call seems do not apply as I get both log.msg and log.err messages into the log. Is there any other way to set up log level? Regards

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[Twisted-Python] Some comments regarding #5190 - ``RFC 6125 ("Service Identity") implementation´´
by exarkun＠twistedmatrix.com May 3, 2014

May 3, 2014

Hello, I've just noticed that the changeset for #5190 included some untested code. Specifically, there are no tests for the code which detects missing dependencies and emits warnings about them. I'd previously noticed that this code was broken but hadn't realized this was because it was untested. I don't think there's any disagreement whatsoever over Twisted's testing requirements. All code must have full line and branch coverage (as reported by the coverage.py tool). Developers, … [View More]

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[Twisted-Python] adding endpoint plugins
by David Stainton May 2, 2014

May 2, 2014

Greetings, I wrote a simple IStreamClientEndpointStringParser for using the SOCKS5ClientEndpoint with Tor: https://gist.github.com/david415/26a4ed59078d2e27376f I modified a txsocksx code example for testing the new endpoint descriptor: https://gist.github.com/david415/7c6040117319cc3b0230 ...but I am not sure how to "register" it such that calls to clientFromString can return this endpoint when the descriptor prefix matches. This doc: https://twistedmatrix.com/documents/13.2.0/api/twisted.… [View More]

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[Twisted-Python] pb objects unexpectedly change identity
by Daniel Sank May 2, 2014

May 2, 2014

Dear twisted users, I think I have found some surprising behavior in perspective broker. I define a subclass of pb.RemoteCache which has a method managed by a descriptor. The descriptor keeps track of the instances it manages in a set. When the RemoteCache is first received by the client, it accesses the descriptor-ified method inside setCopyableState. At that time the RemoteCache's id is a certain value X. Then later when the RemoteCache is notified of a change by the server side Cacheable, … [View More]

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[Twisted-Python] Twisted 14.0.0pre3 Announcement
by HawkOwl May 1, 2014

May 1, 2014

Hi everyone, here’s a new Twisted 14.0 prerelease for you! Tarballs for this prerelease can be found at <http://twistedmatrix.com/Releases/pre/14.0.0pre3>, with the changelog at <http://twistedmatrix.com/Releases/pre/14.0.0pre3/NEWS.txt>. Changes from the previous prerelease include: - Making Twisted Agent do HTTPS hostname verification. For more information and a full list of changes, check the NEWS.txt file. Please download the tarballs and test them with your applications, … [View More]

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[Twisted-Python] problem with numpy and twisted xmlrpc
by Nicola Cesca April 30, 2014

April 30, 2014

Hi all, I'm newbie. I got a lot of problem using xmlrpc and numpy I'm using numpy to to some staff and then serve the results via a twisted/XMLRPC server. If the result is a numpy float 64, I get an exception cause probably twisted can't handle this type. Infact is I downgrade the result to float32 with x=float(x), everything is ok. This is not so good cause if I forget this workaroud somewhere, it's a pain. Have you any better solution? server: |from twisted.webimport xmlrpc, server … [View More]

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[Twisted-Python] Fwd: Trouble with session id reuse/disabling with twisted TLS
by Henrik Thostrup Jensen April 30, 2014

April 30, 2014

Hi I have a twisted service, which uses TLS and I seeing some odd behaviour. New connections are accepted fine, but if a client tries to re-use a TLS session id with a new connection, the services rejects the connection. Poking at the TLS module I added the following line to help me figure out what was wrong: @@ -363,11 +365,13 @@ except ZeroReturnError: # TLS has shut down and no more TLS data will be received over # this connection. … [View More]

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Re: [Twisted-Python] adding endpoint plugins
by exarkun＠twistedmatrix.com April 30, 2014

April 30, 2014

On 03:50 pm, dstainton415(a)gmail.com wrote: >Hi Jean-Paul, > >Thanks for the suggestions. >OK... here's my SSCCE: It looks like you need to make an instance of `TorClientEndpointStringParser`. If a class `implements´ an interface then instances of that class `provide´ the interface. The plugin system searches for objects that `project´ the requested interface. Jean-Paul >cd projects/virtualenv-1.11.1/ >./virtualenv.py ~/virtenv-endpoints-test >. ~/virtenv-endpoints-… [View More]test/bin/activate >usewithtor pip install twisted >cd ~/projects >git clone https://github.com/david415/txsocksx.git >cd txsocksx >git checkout endpoint_parsers >usewithtor python setup.py install >cd examples # CWD is now /home/human/projects/txsocksx/examples >cp tor_client_endpoint_parser.py >/home/human/virtenv-endpoints-test/lib/python2.7/site- >packages/twisted/plugins >find /home/human/virtenv-endpoints-test/ -name "*.pyc" | xargs rm >find /home/human/virtenv-endpoints-test/ -name "dropin.cache" | xargs >rm >python tor-http.py >Traceback (most recent call last): > File "tor-http.py", line 32, in <module> > torEndpoint = clientFromString(reactor, >"tor:host=timaq4ygg2iegci7.onion:port=80") > File "/home/human/virtenv-endpoints-test/local/lib/python2.7/site- >packages/twisted/internet/endpoints.py", >line 1737, in clientFromString > raise ValueError("Unknown endpoint type: %r" % (aname,)) >ValueError: Unknown endpoint type: 'tor' > > >I also tried the PYTHONPATH trick: > >mkdir -p fu/twisted/plugins >cp tor_client_endpoint_parser.py fu/twisted/plugins >PYTHONPATH=/home/projects/txsocks/examples/fu python tor-http.py >Traceback (most recent call last): > File "tor-http.py", line 32, in <module> > torEndpoint = clientFromString(reactor, >"tor:host=timaq4ygg2iegci7.onion:port=80") > File "/home/human/virtenv-endpoints-test/local/lib/python2.7/site- >packages/twisted/internet/endpoints.py", >line 1737, in clientFromString > raise ValueError("Unknown endpoint type: %r" % (aname,)) >ValueError: Unknown endpoint type: 'tor' > > >I wonder if I am having a deployment problem here or if my code has >got problems. >https://github.com/david415/txsocksx/blob/endpoint_parsers/examples/tor_cli… >https://github.com/david415/txsocksx/blob/endpoint_parsers/examples >/tor-http.py > > >Cheers! > >David > >On Wed, Apr 30, 2014 at 2:14 PM, <exarkun(a)twistedmatrix.com> wrote: >>On 01:42 pm, dstainton415(a)gmail.com wrote: >>> >>>Greetings, >>> >>> >>>http://twistedsphinx.funsize.net/projects/core/howto/plugin.html >> >> >>Note that's a random version of the documentation from who knows how >>long >>ago. If you want a random version of the documentation then I suggest >>using >>http://twisted.readthedocs.org/en/latest/ instead. >>> >>>suggests that I can also set the PYTHONPATH to a directory: >> >> >>Sure. As a development environment trick. Putting the module >>defining your >>plugin into *the* twisted/plugins/ directory will reduce your runtime >>cost. >>This is purely a deployment decision, though, so if you'd rather >>expand >>PYTHONPATH then you can. >>> >>>"""if a directory which has been added to sys.path (typically by >>>adding it to the PYTHONPATH environment variable) contains a >>>directory >>>named twisted/plugins/ , each .py file in that directory will be >>>loaded as a source of plugins.""" >>> >>>I'm using twisted 13.2.0 in a virtualenv... and I've tried setting >>>PYTHONPATH to a "twisted/plugins" directory no avail. I must be doing >>>something wrong here but after scouring the docs and twisted source >>>code... I'm just not sure. >> >> >>I don't think there's enough information here to debug your problem. >>Try >>coming up with an http://sscce.org/ or at least providing all of the >>details >>about your setup - the exact value of PYTHONPATH, the command you use >>to >>launch the program, the working directory you use, the complete, exact >>filesystem hierarchy starting at the top-most directory containing any >>code >>you wrote or expect to be in use, etc. >> >>Some random suggestions that have helped other people and might help >>you but >>who knows: >> >> * delete all the dropin.cache files you can find and try again >> * delete all the .pyc files you can find and try again >> * put absolute paths into PYTHONPATH, not relative paths >> * don't put "/foo/bar/twisted/plugins" into PYTHONPATH, put >>"/foo/bar" >> * Make sure your plugin *provides* the plugin interface and IPlugin. >>This >>is not the same *implementing* those interfaces. >> >>Good luck, >>Jean-Paul >> >>_______________________________________________ >>Twisted-Python mailing list >>Twisted-Python(a)twistedmatrix.com >>http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python > >_______________________________________________ >Twisted-Python mailing list >Twisted-Python(a)twistedmatrix.com >http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python [View Less]

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[Twisted-Python] What happens in Montréal… PyCon 2014 Sprint Report
by Kevin Turner April 30, 2014

April 30, 2014

Hi folks, I didn't attend PyCon or the accompanying sprints this year, but judging from the commit traffic, many of you did. And I want to know what you worked on! Partly so I can live vicariously through your experiences, but I know a lot of other people are curious too. Events like this are a great way to show our followers and sponsors what happens when a bunch of people have a chance to get together and focus on the project. I've started a sprint report page on the wiki: https://… [View More]twistedmatrix.com/trac/wiki/PyconSprint2014 Feel free to contribute directly to that page, or reply to this email (either on or off-list) and I'll see if I can summarize the responses. For those of you who were at the sprints this year: * Was this your first time at a development sprint? * Was it your first time contributing to Twisted? * What did you work on? * Did you work on something outside Twisted core? I especially want to hear about these! For Twisted I can look at the commit logs, but if there was activity on related projects, I might not know where to look unless you tell me about it. * Any other lasting impressions? Is there something you'll do differently now as a result of some conversation or experience you had at PyCon? I know now that you're starting to get caught up on sleep and the poutine is leaving your system, you may have reservations about sharing certain things you worked on. Maybe you feel like it's not "ready" yet, or it feels out-of-place next to that ticket Glyph worked on where there were eight or nine thousand words in the ticket comments alone. Maybe some things that happen in Montréal really should stay in Montréal. But if you had a good experience at the sprints, and it's something you'd encourage others to join next time they have the opportunity, please share! If you didn't have the experience you were hoping for, but you learned something that will make it better for next time, share that too. Whether it's something for the sprint organizers or something you wish you could tell your earlier self, help us make next time better. Think nobody else wants to hear about the weird thing you were working on? Might there be a *small* chance? Like one-in-a-million? Then share that too. There are at least a million Python programmers out there. Even if your thing isn't "done," sometimes just knowing someone has _made an attempt_ is important. Lastly, if you have any photos, vines, blender models, artist's renditions of the porting process, or any other media from the sprint, please do email me. From time to time the Software Freedom Conservancy (which supports the Twisted Software Foundation) asks us if we have anything to share that isn't a wall of text, and I'd love to have more things to *show* people. Thanks, - Kevin [View Less]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com April 27, 2014

April 27, 2014

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Re: [Twisted-Python] Synchronous @inlineCallback interpreter
by Clayton Daley April 25, 2014

April 25, 2014

[apologize in advance if this creates threading issues as I picked digests when I signed up not realizing it would make it difficult to reply to threads] Sorry I wasn't more clear. My thought is to write a version that uses the same @inlineCallback name and supports the same syntax (to eliminate the need to rewrite code). However, I don't mean the synchronous version to actually use deferreds at all. All I want the synchronous version to do is "ignore" the yields (likely by sending the … [View More]output right back in after the block clears)... and treat the returnValue() as a return. That way code written in the @inlineCallback syntax can be used by a synchronous or asynchronous consumer. Clayton Daley On Thu, Apr 24, 2014 at 8:14 PM, pierre at jaury.eu wrote: > Le 2014-04-25 01:45, Clayton Daley a écrit : >* I imagine rewriting this to the following: *> >* @classmethod *>* @inlineCallbacks *>* def from_id(cls, id): *>* doc = yield db.get_document(id) # blocking/async db call *> >* self = cls._new_document(doc) # always synchronous *>* yield self.__init__() # blocking/async call *>* returnValue(self) *> >* places. I've read that the @inlineCallback code is complicated so I *>* figured I'd run the idea by the experts before diving down that rabbit *>* hole. * I am no expert, but the code for inlineCallbacks looks pretty straightforward, except some special cases handled down the way. >* Does anyone see any obvious pitfall? I'm happy to do the legwork *>* to try and build it, but I'd also welcome any pointers from your (no *>* doubt extensive) experience writing the twisted version. * I would mostly argue about a semantic problem. inlineCallbacks help asynchronous code *look* like synchronous code thanks to the sequential writing. It is however essentially asynchronous and does return a Deferred. I do not see any immediate technical pitfall here. I would however be very careful and double think my design if I were to use Deferred objects as part of a blocking process. kaiyou. On Thu, Apr 24, 2014 at 7:45 PM, Clayton Daley <clayton.daley(a)gmail.com>wrote: > I have a modular application that communicates over RPC connections (with > both sync and async server/clients available). I want to migrate some of > the modules over to Twisted. Currently, all modules inherit important > utility functions from a parent class. On paper, I now need two versions > of this parent class (synchronous & asynchronous) to be inherited by > modules of the respective types. > > I'm looking for ways to maximize the common code between the two versions > of the parent object. One that comes to mind (motivating the subject of > this post) would be to write a synchronous interpreter for @inlineCallback > calls. For example, here's a synchronous factory function from the parent > class (already partly reconfigured to be friendly to my idea): > > @classmethod > def from_id(cls, id): > doc = db.get_document(id) # blocking db call > self = cls._new_document(doc) # synchronous initialization stuff > self.__init__() # module init code is custom and may block > return self > > I imagine rewriting this to the following: > > @classmethod > @inlineCallbacks > def from_id(cls, id): > doc = yield db.get_document(id) # blocking/async db call > self = cls._new_document(doc) # always synchronous > yield self.__init__() # blocking/async call > returnValue(self) > > Assuming the db connector and init function are appropriate to the > environment, my gut reaction is that this could (when combined with a > synchronous implementation of the decorator) run correctly in both places. > I've read that the @inlineCallback code is complicated so I figured I'd run > the idea by the experts before diving down that rabbit hole. Does anyone > see any obvious pitfall? I'm happy to do the legwork to try and build it, > but I'd also welcome any pointers from your (no doubt extensive) experience > writing the twisted version. > > Thanks in advance! > > Clayton Daley > [View Less]

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[Twisted-Python] Synchronous @inlineCallback interpreter
by Clayton Daley April 25, 2014

April 25, 2014

I have a modular application that communicates over RPC connections (with both sync and async server/clients available). I want to migrate some of the modules over to Twisted. Currently, all modules inherit important utility functions from a parent class. On paper, I now need two versions of this parent class (synchronous & asynchronous) to be inherited by modules of the respective types. I'm looking for ways to maximize the common code between the two versions of the parent object. One … [View More]

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[Twisted-Python] txtorcon v0.9.2
by meejah April 24, 2014

April 24, 2014

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I am happy to announce that txtorcon v0.9.2 is now available. This release adds a few minor bug-fixes and a few API enhancements. Full details: * add on_disconnect callback for TorControlProtocol (no more monkey-patching Protocol API) * add age() method to Circuit * add time_created property to Circuit * don't incorrectly listen for NEWDESC events in TorState * add .flags dict to track flags in Circuit, Stream * build_circuit() can now take … [View More]

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[Twisted-Python] What's the difference between Port and Interface
by Shiyao Ma April 20, 2014

April 20, 2014

Hi. It seems a port can contain multiple interface. In real network, is there a Port? What is port for and what's the corresponding object in real switch? Thanks. -- 吾輩は猫である。ホームーページはhttp://introo.me。

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com April 20, 2014

April 20, 2014

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[Twisted-Python] Create a NAT rule from twsited
by Grigorescu Ciprian April 16, 2014

April 16, 2014

Hello, Is there a way to create a NAT rule from twisted? I need to route a private ip to a public ip from a twisted script. Thank You, Ciprian

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[Twisted-Python] Manhole but no SSH
by Nicholas April 15, 2014

April 15, 2014

Hello, everyone. Is it possible to implement the Manhole but without using SSH (or telnet, for that matter) ? Say I start a service and I want to be thrown straight in a console, much like Manhole does with SSH, but without having to actually listen on a port and having to connect to it with an user and password. Thanks.

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[Twisted-Python] ANN: Crochet 1.2.0 - Use Twisted Anywhere!
by Itamar Turner-Trauring April 14, 2014

April 14, 2014

Crochet is an MIT-licensed library that makes it easier to use Twisted from regular blocking code. Some use cases include: * Easily use Twisted from a blocking framework like Django or Flask. * Write a library that provides a blocking API, but uses Twisted for its implementation. * Port blocking code to Twisted more easily, by keeping a backwards compatibility layer. * Allow normal Twisted programs that use threads to interact with Twisted more cleanly from their threaded parts. For … [View More]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com April 13, 2014

April 13, 2014

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