Twisted December 2004

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55 participants
44 discussions

[Twisted-Python] errorhandler example in docs needs work
by Alan Ezust 26 Dec '04

26 Dec '04

Reading this in the manual: http://twistedmatrix.com/documents/current/howto/defer Example of how to write error handlers for exceptions: def errorHandler(failure): failure.trap(SpamException, EggException) # Handle SpamExceptions and EggExceptions d.addCallback(cookSpamAndEggs) d.addErrback(errorHandler) This example is missing something. The #handle SpamExceptions should have at least one statement after the # like print "I am handling the exception" I look at this example above and I still don't know how to write an error handler. I shall read further, but I wanted to share my feedback.

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[Twisted-Python] Re: [Twisted-commits] r12768 - Make SVN ignore files generated by unit tests.
by Itamar Shtull-Trauring 26 Dec '04

26 Dec '04

On Thu, 2004-12-23 at 03:07 -0700, Tommi Virtanen wrote: > Modified: > trunk/twisted/lore/test/ (props changed) > trunk/twisted/test/ (props changed) > Log: > Make SVN ignore files generated by unit tests. Really we should fix the tests so that the files are not created under the twisted/ tree.

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[Twisted-Python] Weekly Bug Summary
by James Y Knight 26 Dec '04

26 Dec '04

Bug summary ______________________ Since 2004-12-19 04:24:41.480000: Bugs opened: 8 Bugs closed: 2 Total open bugs: 319 (+6) Urgent: 13 (-1) Bug: 123 (+4) Feature: 121 (+3) Wish: 62 (+0) New / Reopened Bugs ______________________ ==== Bug ==== win32: reactor.spawnProcess does not grant permission to open sockets (2 days ago) http://twistedmatrix.com/bugs/issue837 opened by stefanomasini [CONCH, WIN32] Test suite import error on win32 (twisted.conch.test.test_cftp) (2 days ago) http://twistedmatrix.com/bugs/issue836 opened by spiv [TRIAL] "trial --until-failure --debug" totally broken (4 days ago) http://twistedmatrix.com/bugs/issue834 opened by exarkun roundup shouldn't set status to chatting unless status is new or resolved (5 days ago) http://twistedmatrix.com/bugs/issue833 opened by jknight Roundup doesn't auto-add commentators to nosy list (2 weeks ago) CLOSED http://twistedmatrix.com/bugs/issue824 opened by jknight ==== Feature ==== [PATCH] Interface support for adbapi.ConnectionPool (10 hours ago) http://twistedmatrix.com/bugs/issue839 opened by ww [PATCH] Unregister handlers for EventDispatcher (10 hours ago) http://twistedmatrix.com/bugs/issue838 opened by ww [TRIAL] Trial dry-run (3 days ago) http://twistedmatrix.com/bugs/issue835 opened by jml Bugs Closed ______________________ ==== Urgent ==== [TRIAL] Intermittent twisted.trial.test.test_adapters.TestFailureFormatting failure (3 weeks ago) http://twistedmatrix.com/bugs/issue798 opened by exarkun, closed by spiv ==== Bug ==== Roundup doesn't auto-add commentators to nosy list (2 weeks ago) http://twistedmatrix.com/bugs/issue824 opened by jknight, closed by radix

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[Twisted-Python] Page.renderString returns Deferred at <addr> current result: 'blah'
by Alan Ezust 25 Dec '04

25 Dec '04

I'm playing around with Twisted for my first time, and I noticed that page.renderString() returns a string like this: <Deferred at 0x4054616c current result: '<html>\n <head>\n <title>Greetings!</title>\n </head>\n <body>\n <h1 style="font-size: large">Now I will greet you:</h1>\n Hi My name is\n </body>\n</html>'> First, why the Deferred result? Second, what if I just want the actual string? What method should I call? Or am I supposed to do something else to this before getting the renderString?

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[Twisted-Python] nuvow webform example?
by Alan Ezust 25 Dec '04

25 Dec '04

I have another question about the docs in nuvow webform. I'm following the tutorial for nevow and I want to create a dynamic form with model. http://www.divmod.org/Home/Projects/Nevow/index.html I see an example of the webform, but it doesn't quite work: class WebForm(rend.Page): # document = rend.stan( # this should be changed to: docFactory = loaders.stan( tags.html[ tags.body[ h1["Here is the form:"], webform.renderForms('original') ] ]) resource = WebForm(Implementation()) I'm not sure I quite understand why 'original' goes there, but in any case, I don't get any output from this. Is there something else that needs to be fixed with this example? On Fri, 24 Dec 2004 17:23:15 -0500, William Waites <ww(a)groovy.net> wrote: > On Fri, Dec 24, 2004 at 01:50:46PM -0800, Alan Ezust wrote: > > Ah, thanks... the wait() did the trick. > > > > As it turned out, all I was doing was a little test apparently > > creating and calling renderstring() immediately afterwards is a little > > too soon for python to handle, in this example... > > Careful though -- wait is only appropriate to use in trivial > examples. in fact it is only used in the test suite. It does > some things that are not really allowed. Take a look at the > implementation of wait. > > It is really much better to schedule a callback -- this is the > meaning of "you don't call twisted, twisted calls you". > > Good luck, > -w > > -- > ... a poem about a haircut! But lofty, noble, tragic, timeless, > full of love, treachery, retribution, quiet heroism in the face > of certain doom! Six lines, cleverly rhymed, and every word > beginning with the letter s! >

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[Twisted-Python] a couple of patches
by William Waites 24 Dec '04

24 Dec '04

greetings, sent this directly to glyph a little while ago, to deafening silence... perhaps i said the wrong thing ;) here are a couple of patches: the first one adds interface support to enterprise.adbapi.ConnectionPool to make things like IFooBarObject(dbpool) where dbpool is a ConnectionPool instance work as expected. the second adds unregistration methods to the python.dispatch.EventDispatcher cheers, -w

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[Twisted-Python] ANN: Fusion v0.2, C++ integration for Twisted
by Itamar Shtull-Trauring 24 Dec '04

24 Dec '04

Fusion is a library that supports implementing protocols in C++ for use with Twisted, allowing control over memory allocation strategies, fast method calls internally, etc.. Fusion supports TCP, UDP and multicast, and is implemented using the Boost.Python python bindings. Fusion has only been tested on Linux - Debian GNU/Linux with gcc 3.3 on PowerPC and Redhat 7.3 with gcc 2.96 on x86. Fusion is licensed under the MIT license, and available for download from http://itamarst.org/software/fusion-0.2.tar.gz Features supported in v0.2: 1. Scheduling functions with the twisted event loop from C++ (callLater and LoopingCall). 2. Support for implementing C++ UDP and multicast protocols. 3. Support for implementing C++ TCP protocols (client and server), with a zero-copy buffering layer written in C++. Protocols implemented in Python can also use this custom buffering layer. There are two write APIs, one accepting a functor/function that writes to a buffer allocated by Fusion, and the other accepting a shared_ptr that points at an instance that owns a buffer. ** WARNING ** Writing networking code in C++ can lead to buffer overflows and other unpleasant security problems. Stick to pure Python unless you have no other choice and know what you're doing. Don't assume I know what I'm doing, either - bug reports are more than welcome :)

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[Twisted-Python] How to use Application with wxpython and tcp client
by lijie 23 Dec '04

23 Dec '04

I have a gui using wxpython, and I want to connect a server use twisted. How to implement it using application or service?

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[Twisted-Python] Re: [Twisted-web] Installing on Fedora
by Andrew Bennetts 23 Dec '04

23 Dec '04

[Moving to twisted-python(a)twistedmatrix.com -- I don't see anything web-specific here] On Wed, Dec 22, 2004 at 05:58:01PM -0800, Robert Ide wrote: > Here is the error from running python setup.py install > > running install > Traceback (most recent call last): > File "setup.py", line 358, in ? > setup(**setup_args) [...] > File "/usr/lib/python2.2/distutils/sysconfig.py", line 322, in _init_posix > raise DistutilsPlatformError(my_msg) > distutils.errors.DistutilsPlatformError: invalid Python installation: unable > to open /usr/lib/python2.2/config/Makefile (No such file or directory) To be clear: what exactly are you trying to install? The Twisted 1.3 tarball? I don't know Fedora, but I'd check to see if you have the python-devel package installed, and if not see if it makes a difference. Also, a bit of googling shows there's already an RPM of Twisted for Fedora: http://download.fedora.redhat.com/pub/fedora/linux/core/development/i386/Fe… Any particular reason you aren't using that? Let us know how you're going. -Andrew.

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[Twisted-Python] Re: [Twisted-web] Installing on Fedora
by Mary Gardiner 23 Dec '04

23 Dec '04

OK, when you say "I got errors", can you tell us what the errors were? The last 15 lines of the install output would be a good start. -Mary On Wed, Dec 22, 2004, Robert Ide wrote: > I am trying to install Twisted > > I downloaded from the twisted site > > I got errors and when I try to run twistd --version I get "not found" > > Rob > > > > -----Original Message----- > From: twisted-web-bounces(a)twistedmatrix.com > [mailto:twisted-web-bounces@twistedmatrix.com] On Behalf Of Mary Gardiner > Sent: Wednesday, December 22, 2004 7:42 PM > To: twisted-web(a)twistedmatrix.com > Subject: Re: [Twisted-web] Installing on Fedora > > On Wed, Dec 22, 2004, Robert Ide wrote: > > This may be a rooky question but I'm having some trouble installing on > > Fedora. I ran python setup.py install but that didn't seem to work and when > I > > look at admin/twisted.spec I'm not sure what to do with it. Should I be > using > > rpm with this? > > A few questions: > > 1. What are you trying to install exactly (twisted, Nevow...)? > 2. Where did you download it from? > 3. What tells you that "python setup.py install" didn't work (error > messages, failure of the program to show up in the right place)? > > If it's twisted you're trying to install, > twisted-python(a)twistedmatrix.com might be of some help... > > -Mary

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Twisted December 2004