Mailman 3 October 2006 - Twisted

Re: [Twisted-Python] Trial __del__ behavior change - intentional?
by glyph＠divmod.com Oct. 10, 2006

Oct. 10, 2006

On 12:58 am, slamb(a)slamb.org wrote: >It appears I can't use reference handling to clean up >resources within a trial - the output code apparently keeps a reference to >the stack trace or something until after it's done. That's too late for me >- this resource is essentially a mutex, so if I have more than one TestCase >in a single trial run, my tests don't work. I can't speak to the intentionality of that particular change, but there are many cases where code (not … [View More]

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Re: [Twisted-Python] Twisted & Qt
by glyph＠divmod.com Oct. 10, 2006

Oct. 10, 2006

On 9 Oct, 04:59 am, foom(a)fuhm.net wrote: >On Oct 5, 2006, at 2:08 PM, Wilfredo S�nchez Vega wrote: >>This is bunk. > >Yes, I agree (again). There's really no reason to keep discussing this unless you get input from a lawyer or a relevant copyright holder. The decision has been made: qtreactor is going to be developed and released outside of Twisted trunk proper, but given the relatively light level of development it generally sees, I don't see this creating a lot of problems.

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[Twisted-Python] Trial __del__ behavior change - intentional?
by Scott Lamb Oct. 10, 2006

Oct. 10, 2006

I'm seeing a weird thing on Twisted 2.2.0. It does not happen with older versions of Twisted (trunk revision 16674, which I had sitting around for some reason). It appears I can't use reference handling to clean up resources within a trial - the output code apparently keeps a reference to the stack trace or something until after it's done. That's too late for me - this resource is essentially a mutex, so if I have more than one TestCase in a single trial run, my tests don't work. … [View More]Is this change intentional? My test code's inline, along with results on both versions. I'm not quite sure how make proper unit tests of trial itself, so unfortunately you must interpret the results manually. $ cat resource_test.py #!/usr/bin/env """A test of using __del__ for cleaning up resources within trial tests. On trunk revision 16674, this works fine. On Twisted 2.2.0, something holds an extra reference to my resource object. Python actually exits without ever calling my __del__. """ from twisted.trial import unittest class MyResource: def __init__(self, cleaned_up): print '<<<INIT CALLED>>>' self.cleaned_up = cleaned_up def __del__(self): print '<<<DEL CALLED>>>' self.cleaned_up[0] = True def raiseerror(self): raise Exception('foo') class ReferenceTest(unittest.TestCase): def setUp(self): # This is an array so that the callee can make changes that alter # our copy. self.cleaned_up = [False] self.my_resource = MyResource(self.cleaned_up) def tearDown(self): self.my_resource = None self.assertEquals(self.cleaned_up[0], True) def testError(self): self.my_resource.raiseerror() def testPass(self): pass [machine-a ~]$ svnversion svn/Twisted 16674 [machine-a ~]$ trial resource_test resource_test ReferenceTest <<<INIT CALLED>>> testError ... <<<DEL CALLED>>> [ERROR] <<<INIT CALLED>>> testPass ... <<<DEL CALLED>>> [OK] ======================================================================== ======= [ERROR]: resource_test.ReferenceTest.testError File "twisted/internet/defer.py", line 109, in maybeDeferred File "/Users/slamb/resource_test.py", line 35, in testError self.my_resource.raiseerror() File "/Users/slamb/resource_test.py", line 21, in raiseerror raise Exception('foo') exceptions.Exception: foo ------------------------------------------------------------------------ ------- Ran 2 tests in 0.030s FAILED (errors=1, successes=1) [machine-b ~]$ rpm -q python-twisted python-twisted-2.2.0-1 [machine-b ~]$ trial resource_test Running 2 tests. resource_test ReferenceTest testError ... <<<INIT CALLED>>> [ERROR] [ERROR] tearDown ['ERROR'] testPass ... <<<INIT CALLED>>> <<<DEL CALLED>>> [OK] ======================================================================== ======= [ERROR]: resource_test.ReferenceTest.testError File "/home/slamb/resource_test.py", line 35, in testError self.my_resource.raiseerror() File "/home/slamb/resource_test.py", line 21, in raiseerror raise Exception('foo') exceptions.Exception: foo ======================================================================== ======= [ERROR]: resource_test.ReferenceTest.testError File "/home/slamb/resource_test.py", line 32, in tearDown self.assertEquals(self.cleaned_up[0], True) twisted.trial.unittest.FailTest: False != True ------------------------------------------------------------------------ ------- Ran 2 tests in 0.055s FAILED (errors=2, successes=1) <<<DEL CALLED>>> -- Scott Lamb <http://www.slamb.org/> [View Less]

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[Twisted-Python] Mailing List Hiccup
by Jean-Paul Calderone Oct. 9, 2006

Oct. 9, 2006

Mailman was out to lunch for a few days last week and over the weekend. Things should be sorted out now, and I don't think any messages _to_ the list got lost, however I do think delivery of those messages to some subscribers got messed up. I don't know of any way to rectify this, so if you want to be sure you didn't miss any messages, you may want to go take a look at the mailman archives (linked from the bottom of this message). Jean-Paul

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[Twisted-Python] Twisted & Qt
by Ed Suominen Oct. 9, 2006

Oct. 9, 2006

I'm using the qtreactor in a GPL-but-unreleased PyQt 4.1 application of my own, and have not found any problems whatsoever with the integration of the Qt Twisted event loops. It's really a pretty slick combination. As an example and a contribution, I offer the following (GPL'd) module: http://deadbeefbabe.org/paste/1996 (syntax-highlighted version), http://foss.eepatents.com/misc/qt-twisted-dialog.py (source). It allows you to construct a non-blocking modal dialog, immediately obtaining a … [View More]

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Re: [Twisted-Python] Windows Buildbot for DDR Ram
by Timothy Fitz Oct. 8, 2006

Oct. 8, 2006

On 10/8/06, Eric Mangold <teratorn(a)twistedmatrix.com> wrote: > I have some $$ sitting here from a previous donation that ought to be put > to good use. Thanks for the support but the iocp-buildslave is already paid for and built, details and pictures can be found at http://www.timothyfitz.com/blog/?p=5 . Of course, we can always use *more* buildslaves, so if you happen to have $300 or so laying around, we need a threadedselectreactor buildslave and a wxReactor buildslave. Timothy Fitz

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com Oct. 8, 2006

Oct. 8, 2006

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[Twisted-Python] _dumbwin32proc and PIPE_NOWAIT
by Manlio Perillo Oct. 7, 2006

Oct. 7, 2006

From the msdn: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ipc/base/s… """PIPE_NOWAIT 0x00000001 Nonblocking mode is enabled. In this mode, ReadFile, WriteFile, and ConnectNamedPipe always return immediately. Note that nonblocking mode is supported for compatibility with Microsoft® LAN Manager version 2.0 and should not be used to achieve asynchronous input and output (I/O) with named pipes. """ P.S. I really can't believe that win32 support for asynchronous I/O works … [View More]

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[Twisted-Python] A New Web Presence for Twisted
by Duncan McGreggor Oct. 7, 2006

Oct. 7, 2006

Huw Wilkins has done a fabulous job creating and donating a new look and feel to the Twisted community. He is continuing in the effort while we convert a testing/dev trac instance to his vision. We are all getting excited about having the new site go live, and could use a little help from the community. For those willing to put some time into testing the development version of the site, there is a trac item for logging issues encountered: http://twistedmatrix.com/trac/ticket/2156 Note … [View More]

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[Twisted-Python] Is there any way to run twisted ( via twistd ) in a real profiler?
by jarrod roberson Oct. 4, 2006

Oct. 4, 2006

we are trying to find where Twisted is spending all its time in a server we are working on? -- If you don't know what you want, you probably need a nap.

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Re: [Twisted-Python] twistd save state does not work
by glyph＠divmod.com Oct. 4, 2006

Oct. 4, 2006

On 2 Oct, 06:23 am, mailinglists(a)smartology.nl wrote: >Why not incorporate python logging into twisted? That way is easyer to >incorporate modules without having to 'bother' with twisted. Or use modules >which are not especially written for twisted. Exarkun already mentioned that this doesn't solve the problem doesn't being discussed, but there is an open issue for discussion of logging.py if you have other reasons you'd like to suggest. http://twistedmatrix.com/trac/ticket/307

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[Twisted-Python] (no subject)
by exarkun＠divmod.com Oct. 3, 2006

Oct. 3, 2006

On 01:32 am, timothyfitz(a)gmail.com wrote: >Recently there have been some changes to ThreadedSelectReactor, >specifically that it is no longer being considered as a stand alone >reactor choice (for example, you will no longer be able to twistd >--reactor=threadedselect). This action is desirable since there's no >reason for it. As I understand TSR it's broken for that usage anyway; >however, I have been warned that TSR is completely broken and >shouldn't be used at all. … [View More]

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[Twisted-Python] ThreadedSelectReactor
by Timothy Fitz Oct. 3, 2006

Oct. 3, 2006

Recently there have been some changes to ThreadedSelectReactor, specifically that it is no longer being considered as a stand alone reactor choice (for example, you will no longer be able to twistd --reactor=threadedselect). This action is desirable since there's no reason for it. As I understand TSR it's broken for that usage anyway; however, I have been warned that TSR is completely broken and shouldn't be used at all. What exactly and specifically are the current problems or at least … [View More]

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[Twisted-Python] twistd save state does not work
by Remi Cool Oct. 2, 2006

Oct. 2, 2006

Hello, I've readied my app for use with twistd, the daemonizing works, but a tap file is not saved upon exit (kill 'cat twisted.pid'). How can I enable the save state option? BTW I'm not using the -o option with twistd ;) Second ... is it possible to disable the twisted logging if you use twistd to start the app? Or is it possible to set a log level so that only warnings and errors are shown and my log is not flooded with (TCPServer) connection messages. - Remi -

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[Twisted-Python] _pollingfile._PollingTimer
by Manlio Perillo Oct. 1, 2006

Oct. 1, 2006

Since the _PollingTimer can be reused for a possible console support, why not to make it a public "simil reactor"? As an example: class UPollReactor(object): """User mode polling reactor, for Windows. Note that this is not a real reactor. """ def addResource(self, resource, action): ... def run(): # add a fake resource, just to do the job done by twistd with the # TimeService ... twistd can, as an example, always "run" the UPollReactor when on a … [View More]

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[Twisted-Python] Removing _wait from Trial
by Jonathan Lange Oct. 1, 2006

Oct. 1, 2006

So, I would like to remove _wait() from Trial and make it work like a regular Twisted application. I've had all this stuff on my brain, and have decided to dump it here for feedback. Here's how the plan looks at the moment[1]: 1. Deprecate the use of reactor-spinning things within tests. (Twisted 2.5) We've already done a great deal of work on this. spinWhile, spinUntil and util.wait have alll been deprecated and removed. #2090 (ready for review) actually issues deprecation warnings when … [View More]the reactor is iterated, crashed or stopped within a test. Unfortunately, some of Trial's cleanup code spins the reactor (see t.trial.util._Janitor.do_cleanPending). This has to go. 2. Tighten test cleanup errors. (Twisted 2.5) #2091 (ready for review) fulfils a long-standing promise. The "reactor unclean" warnings have been turned into errors. It doesn't help us remove _wait, but To remove _wait, we'll also have to remove the two calls to reactor.iterate() from _Janitor (see #2092). That means that many tests that *thought* they were cleaning up the reactor properly will find out that they weren't. We can reduce the number of errors by simulating reactor.iterate() using callLater. However, experiments show that even with this bandaid, there will still be new errors in the Twisted suite. That means we will have to either: a) surprise our users with new errors in their tests b) find some way to introduce this gradually. Obviously everyone[2] would prefer b). I've filed #2124 explaining how that might work. 3. Introduce asynchronous APIs to Trial (Twisted 2.6) Currently TestCase.run() is a blocking call. I wish it could remain a blocking call, but it can't. The branch for #1781 makes a SyncTestCase and an AsyncTestCase. run() works in SyncTestCase and doesn't work in AsyncTestCase. For AsyncTestCase, one uses runDeferred(). Although the branch for #1781 will need to be abandoned, these new classes should be brought in for Twisted 2.6 (without breaking run()). Naturally, this affects many, many tests in Trial. We might even add runDeferred to TestSuite at this point. 4. Deprecate TestSuite.run and TestCase.run. (Twisted 2.6) Neither of these will work without wait[3] and they are both public APIs. Also remove the calls to iterate() from _Janitor at this point. 5. Actually remove _wait. (Twisted 2.7) Add runDeferred() to TestSuite, make run() raise NotImplementedErrors for TestCase and TestSuite. Alter TrialSuite to start and stop the reactor. I can't find a theory to explain why this change will break unexpected tests in the Twisted suite. However, it will certainly happen. That means that some tests in user code will probably break as well. I don't know how we could make this any smoother. Questions: - What should I do with the ticket #1781? - What should I do with the branch for #1781? - What more can we do to reduce the number of tests that will break when _wait is removed? - Thoughts? thanks for getting this far :), jml [1] Incidentally, all of this would be superfluous if reactors were restartable. [2] Well, almost everyone [3] ... or restartable reactors. [View Less]

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[Twisted-Python] how can I invoke an httpFactory method in http.request?
by wang wei Oct. 1, 2006

Oct. 1, 2006

hi, is that a way to invoke a function in httpFactory from a http.request? code here: from twisted.web import http class anotherRequestHandler(http.Request): def process(self): ''' how to invoke a method in anotherHttpFactory such as judge? ''' class anotherHttp(http.HTTPChannel): requestFactory = anotherRequestHandler class resolve: def show(self): return 'ok' class anotherHttpFactory(http.HTTPFactory): … [View More]

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com Oct. 1, 2006

Oct. 1, 2006

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