Mailman 3 September 2015 - 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] revisiting onboarding
by Glyph Lefkowitz Oct. 26, 2015

Oct. 26, 2015

A few months ago, the question of an official process for obtaining commit access was raised. The discussion lead to this proposal - https://twistedmatrix.com/trac/wiki/Proposal/ContributorAdvancementPath <https://twistedmatrix.com/trac/wiki/Proposal/ContributorAdvancementPath>. I like that proposal, but it is still incomplete: to wit, it defines a template for how roles might be defined but does not actually define any roles. It also seems to be a bit overly ambitious, just from the … [View More]

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[Twisted-Python] txtorcon 0.14.0
by meejah Oct. 25, 2015

Oct. 25, 2015

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm happy to announce txtorcon 0.14.0. Changes: * IStreamAttacher handling was missing None and DO_NOT_ATTACH cases if a Deferred was returned. * add .is_built Deferred to txtorcon.Circuit that gets callback()'d when the circuit becomes BUILT * David Stainton ported his "tor:" endpoint parser so now both client and server endpoints are supported. This means **any** Twisted program using endpoints can use Tor as a client. For example, to … [View More]

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[Twisted-Python] txmongo vs. pymongo + callInThread
by Clayton Daley Oct. 12, 2015

Oct. 12, 2015

Are there any major disadvantages of using pymongo with callInThread instead of txmongo? I'd like to take advantage of some newer features in pymongo (unfortunately not available in txmongo) and it's certainly easier to maintain feature parity using callInThread. Clayton Daley

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[Twisted-Python] twisted.mail.imap4.IMAP4Client.fetchMessage always throws exception
by Wang Yan Oct. 5, 2015

Oct. 5, 2015

Hi, I've installed Twisted 15.3.0 on Ubuntu 14.04LTS. Excellent work but there's one problem bothering me for a long time: twisted.mail.imap4.IMAP4Client.fetchMessage always throws exception and the exception occured at random, e.g. somtimes the exception occured when the program read the 120th mail, sometimes it occured at the 150th or 200th mail. The traceback of the exception is as follows: Unhandled Error Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/… [View More]Twisted-15.3.0-py2.7-linux-i686.egg/twisted/python/log.py", line 101, in callWithLogger return callWithContext({"system": lp}, func, *args, **kw) File "/usr/local/lib/python2.7/dist-packages/Twisted-15.3.0-py2.7-linux-i686.egg/twisted/python/log.py", line 84, in callWithContext return context.call({ILogContext: newCtx}, func, *args, **kw) File "/usr/local/lib/python2.7/dist-packages/Twisted-15.3.0-py2.7-linux-i686.egg/twisted/python/context.py", line 118, in callWithContext return self.currentContext().callWithContext(ctx, func, *args, **kw) File "/usr/local/lib/python2.7/dist-packages/Twisted-15.3.0-py2.7-linux-i686.egg/twisted/python/context.py", line 81, in callWithContext return func(*args,**kw) --- <exception caught here> --- File "/usr/local/lib/python2.7/dist-packages/Twisted-15.3.0-py2.7-linux-i686.egg/twisted/internet/posixbase.py", line 597, in _doReadOrWrite why = selectable.doRead() File "/usr/local/lib/python2.7/dist-packages/Twisted-15.3.0-py2.7-linux-i686.egg/twisted/internet/tcp.py", line 209, in doRead return self._dataReceived(data) File "/usr/local/lib/python2.7/dist-packages/Twisted-15.3.0-py2.7-linux-i686.egg/twisted/internet/tcp.py", line 215, in _dataReceived rval = self.protocol.dataReceived(data) File "/usr/local/lib/python2.7/dist-packages/Twisted-15.3.0-py2.7-linux-i686.egg/twisted/protocols/basic.py", line 571, in dataReceived why = self.lineReceived(line) File "/usr/local/lib/python2.7/dist-packages/Twisted-15.3.0-py2.7-linux-i686.egg/twisted/mail/imap4.py", line 2356, in lineReceived self._regularDispatch(line) File "/usr/local/lib/python2.7/dist-packages/Twisted-15.3.0-py2.7-linux-i686.egg/twisted/mail/imap4.py", line 2383, in _regularDispatch tag, rest = parts exceptions.ValueError: need more than 1 value to unpack My code is as simple as possible and the exception is thrown by the following codes: dlist = [] for msg in messages: # use message number, not UID d = self.fetchMessage(msg, uid=False) d.addCallback(cbGetAttachment) dlist.append(d) dl = defer.DeferredList(dlist) return dl.addCallback(cbLogout) Is there anybody know about this issue? [View Less]

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[Twisted-Python] twisted compatibility with multiprocessing module in fork+execv mode
by Flavio Grossi Oct. 3, 2015

Oct. 3, 2015

I know the multiprocessing module is not properly supported by twisted apps because of the interactions among duplicated file descriptors and signal handling, as discussed other times. But python 3.4 introduces a new mode to use that module by spawning (i.e. fork() followed by execv()) the new processes instead of simply forking it. So my question is how supported this is by twisted, and in general how safe it is to use subprocesses created by duplicating the parent immediately followed by … [View More]

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[Twisted-Python] Usage and testing of the new logging system
by Adi Roiban Sept. 30, 2015

Sept. 30, 2015

Hi, I feel that the current documentation for the new logging system lacks information about how to use it in new Twisted code, how to refactor/migrate existing code and how to test the usage of the new logging system. I have created a dedicated ticket https://twistedmatrix.com/trac/ticket/8036 which should focus on updating the current documentation to include some examples and best practices. This email is just to let you know about the new ticket and that it requires your feedback. … [View More]

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[Twisted-Python] inlineCallbacks eating unhandled exceptions?
by Timothy Allen Sept. 29, 2015

Sept. 29, 2015

The other day I was experimenting with the inlineCallbacks decorator in Twisted 15.4, and occasionally when I'd typo a variable name or similar, I'd get an "unhandled error" in the log without a traceback, which was rather unhelpful. Eventually, I managed to produce the following test-case: https://gist.github.com/OptiverTimAll/43263a7a4cf5a298e8f5 If I run it as-is, I get the following unhelpful output: CRITICAL:twisted:Unhandled error in Deferred: CRITICAL:twisted: If I … [View More]comment out the line that redirects Twisted's logging to the standard library's logging system, I get much more helpful output: Unhandled error in Deferred: Traceback (most recent call last): File "./ic-test.py", line 20, in <module> bogus_callback() File "/home/timall/.virtualenvs/txfuse/lib/python2.7/site-packages/twisted/internet/defer.py", line 1274, in unwindGenerator return _inlineCallbacks(None, gen, Deferred()) --- <exception caught here> --- File "/home/timall/.virtualenvs/txfuse/lib/python2.7/site-packages/twisted/internet/defer.py", line 1128, in _inlineCallbacks result = g.send(result) File "./ic-test.py", line 17, in bogus_callback yield does_not_exist() exceptions.NameError: global name 'does_not_exist' is not defined I expected that changing the destination of log messages wouldn't change their content, but apparently I was wrong. I got the incantation for re-routing Twisted's logging system into the Python one by stitching together code-snippets from http://twistedmatrix.com/documents/current/core/howto/logger.html#starting-… Is there some better way, or some other thing I should be doing? -- Timothy Allen Tools Developer 39 Hunter Street, Sydney NSW 2000 T: +61 2 9275 6000 │ F: +61 2 9275 6150 W: http://www.optiver.com/sydney We're hiring (lots)! Information contained in this communication (including any attachments) is confidential and may be privileged or subject to copyright. If you have received this communication in error you are not authorised to use the information in any way and Optiver requests that you notify the sender by return email, destroy all copies and delete the information from your system. Optiver does not represent, warrant or guarantee that this communication is free from computer viruses or other defects or that the integrity of this communication has been maintained. Any views expressed in this communication are those of the individual sender. Optiver does not accept liability for any loss or damage caused directly or indirectly by this communication or its use. Please consider the environment before printing this email. [View Less]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com Sept. 20, 2015

Sept. 20, 2015

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[Twisted-Python] Paid summer work for the Twisted Software Foundation
by Eeshan Garg Sept. 18, 2015

Sept. 18, 2015

Hello! I recently moved to St. John's, NL, Canada to study at the Memorial University of Newfoundland. And I was wondering if I can do some paid summer work for Twisted next summer? It would be a great learning experience for me, and not to mention that it would also help me pay my tuition. The reason I am asking this question now is because I think it will give me some time to prepare and get some guidance from Twisted developers regarding potential project ideas and what to work on, should … [View More]

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[Twisted-Python] Fwd: Re: npyscreen Twisted Reactor
by Mark Tearle Sept. 16, 2015

Sept. 16, 2015

Hi folks A quick email to alert folks to an updated version of the Twisted Reactor that I wrote for use with npyscreen. Npyscreen is a python widget library and application framework for programming terminal or console applications. It is built on top of ncurses, which is part of the standard library. It is written by Nicholas Cole. (See https://bitbucket.org/npcole/npyscreen) Updates include: * Addition of setuptools config * Registered on PyPI * Change of repository name It can now be … [View More]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com Sept. 13, 2015

Sept. 13, 2015

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[Twisted-Python] call for volunteers: fundraising
by Glyph Lefkowitz Sept. 11, 2015

Sept. 11, 2015

Hi all, The Twisted project needs volunteers to help us with fundraising. Although we have several sponsor logos on the front page of our website, all but only one of them, Variomedia (thanks Variomedia!) is actually current; every other sponsor has expired, and we just haven't gotten around to removing them yet. (So if you work at Dyn, Olark, or CritSend please remind your employer to renew!) As you may know, Twisted is a member project of the Software Freedom Conservancy https://… [View More]

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[Twisted-Python] understanding IConsumer
by Roshan Cherian Sept. 10, 2015

Sept. 10, 2015

Hi Team, I am sorry if this is coming off as a newbie question. Its probably because I don't understand it enough. I would like to: 1. connectTCP to a host, port 2. use the transport to write 3. Use consumer to read from the transport what the tcp server has written to I wasn't able to find information on consumer and how it gets triggered when data is available especially in the case I have Thanks, -Roshan

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[Twisted-Python] Usage of diffresource in Twisted's Trac
by Adi Roiban Sept. 9, 2015

Sept. 9, 2015

Is there anybody still using the diffresource links in Trac tickets? If you are still using it, do you think you can use the GitHub diff instead? Can we remove it from Trac? I prefer the GitHub diff as I can use side-by-side view and expand the diff or go to full file. Here is the associated ticket https://github.com/twisted-infra/braid/issues/102 Thanks! -- Adi Roiban

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[Twisted-Python] Auto-Re: Usage of diffresource in Twisted's Trac
by wangliyu＠dhcc.com.cn Sept. 9, 2015

Sept. 9, 2015

您的邮件已收到，我会尽快处理，谢谢！ ---- -------------------------- Best Regards, 王立宇 -------------------------- DHC Software Co.,Ltd. 东华软件股份公司 Add：11th floor,DHC Office Building,ZiJin Digital Park ,Zhongguancun,Haidian District, BeiJing ,China 北京市海淀区中关村紫金数码园3号楼东华合创大厦11层邮编 100190 手机：18612695237

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[Twisted-Python] Asynchronously initializing objects in twisted.web?
by Nagy, Attila Sept. 9, 2015

Sept. 9, 2015

Hi, I wonder, if I have this example program: https://twistedmatrix.com/documents/current/web/howto/using-twistedweb.html… how do I initialize an external resource (like a dictionary, which is fetched from a database) with asynchronous twisted tools, but before the HTTP server starts listening on its port? The goal here is that the HTTP server shouldn't start until it can fetch the desired data. Of course I can do this in a synchronous way, but it feels so unnatural and bad practice to … [View More]

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[Twisted-Python] error on log module (twisted python 3)
by Gelin Yan Sept. 8, 2015

Sept. 8, 2015

Hi All I just noticed my app raised an exception such as Traceback (most recent call last): File "/home/m/py343/lib/python3.4/runpy.py", line 170, in _run_module_as_main "__main__", mod_spec) File "/home/m/py343/lib/python3.4/runpy.py", line 85, in _run_code exec(code, run_globals) File "gw_go.zip/__main__.py", line 8, in <module> File "gw_go.zip/gw_server2/gw_go.py", line 87, in main File "/home/m/py343/lib/python3.4/site-packages/twisted/python/logfile.py",… [View More]

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[Twisted-Python] Converting str to bytes in Py3 port
by Adi Roiban Sept. 8, 2015

Sept. 8, 2015

Hi, While reviewing the latest patch related to porting Twisted to py3 I saw that many values which were supposed to hold just text were ported as bytes. The argument for this conversion was that Twisted is a low level framework and that other high level framworks like Treq or Klein should implement the required code so that end user can just use text. For example the HTTP response messages are not bytes, even if the RFC specified that they should only contain text with a single encoding. I … [View More]

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[Twisted-Python] Exception's Implicit Public API, and Python 3
by Amber "Hawkie" Brown Sept. 8, 2015

Sept. 8, 2015

We just ran into an issue in Autobahn|Python where a log message that tried to use the message attribute an Exception subclass (twisted.internet.error.ProcessTerminated). The message attribute was deprecated in Python 2.6, and removed in Python 3 -- but it still "works" in Python 2.7. So, this needs the question: Is this breaking Twisted's backwards compat (that .message isn't there on Python 3)? Should we go through and look at our exception subclasses, and look at what makes sense to have a .… [View More]

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[Twisted-Python] Auto-Re: error on log module (twisted python 3)
by wangliyu＠dhcc.com.cn Sept. 8, 2015

Sept. 8, 2015

您的邮件已收到，我会尽快处理，谢谢！ ---- -------------------------- Best Regards, 王立宇 -------------------------- DHC Software Co.,Ltd. 东华软件股份公司 Add：11th floor,DHC Office Building,ZiJin Digital Park ,Zhongguancun,Haidian District, BeiJing ,China 北京市海淀区中关村紫金数码园3号楼东华合创大厦11层邮编 100190 手机：18612695237

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[Twisted-Python] HAProxy and twisted TCP/IP support
by Zuhaib Siddique Sept. 8, 2015

Sept. 8, 2015

Hey all, I am looking at using HAProxy in front of Twisted for TCP connection and need to pass the source IP along. We are currently looking at hacking tcp.py to add support for this: http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt but wondering if this is something someone is already working on for twisted or maybe I dont need to hack tcp.py. Thanks Zuhaib

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[Twisted-Python] Crossbar.io 0.11.0
by Tobias Oberstein Sept. 7, 2015

Sept. 7, 2015

Hi all, I am pleased to announce Crossbar.io 0.11.0 https://github.com/crossbario/crossbar#crossbario https://pypi.python.org/pypi/crossbar/0.11.0 Crossbar.io is an open-source WAMP application router that allows to build advanced applications from loosely-coupled components that can talk in real-time with each other. This is a big release: - Python 3 support! Yes, that's right. Crossbar.io now runs on Py3. - Node, worker and component start/stop/failure behavior improved a lot - new … [View More]

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