Mailman 3 March 2007 - Twisted

[Twisted-Python] memcached client for Twisted
by Manlio Perillo 06 Mar '07

06 Mar '07

Hi. I'm searching for a memcached client for Twisted. I have searched with Google, but without success. Thanks Manlio Perillo

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com 04 Mar '07

04 Mar '07

Bug summary ______________________ Summary for 2007-02-25 through 2007-03-04 Bugs opened: 25 Bugs closed: 1 Total open bugs: 877 (+24) |== Type Changes |== Priority Changes |== Component Changes |Defect: +16 |Highest: +2 |Core: +12 |Enhancement: +6 |High: +4 |Names: +2 |Task: +3 |Normal: +19 |Trial: +4 |Web2: +1 |Words: +6 New / Reopened Bugs ______________________ ===== Highest ===== [#2495] Trial never passes a traceback to pyunit-API TestResult objects (opened by jml) defect trial http://twistedmatrix.com/trac/ticket/2495 [#1652] xish' EventDispatcher grinds to a halt when using many different one-time observers (opened by ralphm) defect words http://twistedmatrix.com/trac/ticket/1652 ===== High ===== [#2486] Change coding standard to require all new classes to be new style (opened by itamarst) enhancement core http://twistedmatrix.com/trac/ticket/2486 [#2490] xpath.queryForString fails on unicode XML (opened by akrherz) defect words http://twistedmatrix.com/trac/ticket/2490 [#2496] Failure constructor API doesn't specify valid values of exc_tb (opened by jml) defect core http://twistedmatrix.com/trac/ticket/2496 [#2497] FastCGI: infinite loop for packets bigger than 65k (opened by j2a) defect web2 http://twistedmatrix.com/trac/ticket/2497 ===== Normal ===== [#2480] twisted.test.test_application.TestInternet2.testConnectionGettingRefused is racey (opened by exarkun) defect core http://twistedmatrix.com/trac/ticket/2480 [#2481] Several trial tests fail when run multiple times in a single process (opened by exarkun) defect trial http://twistedmatrix.com/trac/ticket/2481 [#2482] TrialRunners need separate workingDirectory under Windows (opened by therve) defect trial http://twistedmatrix.com/trac/ticket/2482 [#2483] Undesirable garbage collector/spawnProcess interaction (opened by exarkun) defect core http://twistedmatrix.com/trac/ticket/2483 [#2484] Support 2.6 and 3.0 with same code base (opened by itamarst) task core http://twistedmatrix.com/trac/ticket/2484 [#2485] 2to3 cross-compilation tools (opened by itamarst) task core http://twistedmatrix.com/trac/ticket/2485 [#2487] Switch all classes in Twisted to be new style (opened by itamarst) enhancement core http://twistedmatrix.com/trac/ticket/2487 [#2488] more efficient adbapi (opened by jack) enhancement core http://twistedmatrix.com/trac/ticket/2488 [#2489] trial.py script fails on Windows with Python 2.5 (opened by arkanes) defect trial http://twistedmatrix.com/trac/ticket/2489 [#2491] Deprecate and remove special case behavior for non-None IProtocol.dataRecived return value handling (opened by exarkun) task core http://twistedmatrix.com/trac/ticket/2491 [#2492] Unhandled socket error when making DNS query (opened by p1mrx) defect names http://twistedmatrix.com/trac/ticket/2492 [#2493] Incomplete documentation for exceptions which can be raised by IUDPTransport.write (opened by exarkun) defect core http://twistedmatrix.com/trac/ticket/2493 [#2494] twisted.words.protocols.msn lineReceived bug (opened by qyb) defect words http://twistedmatrix.com/trac/ticket/2494 [#2498] trial hangs with threadpool (opened by jack) defect trial http://twistedmatrix.com/trac/ticket/2498 [#2499] Support DNS UPDATE messages (client and server) in Twisted Names (opened by exarkun) enhancement names http://twistedmatrix.com/trac/ticket/2499 [#2500] Add @since to the coding standard (opened by exarkun) enhancement core http://twistedmatrix.com/trac/ticket/2500 [#2501] defer.inlineCallbacks can't decorate an empty function (opened by jack) defect core http://twistedmatrix.com/trac/ticket/2501 [#2502] 'and' and 'or' operator suport for xpath (opened by jack) enhancement words http://twistedmatrix.com/trac/ticket/2502 [#2503] Random garbage/debug prints in t-im irc support signon codepath (opened by exarkun) defect words http://twistedmatrix.com/trac/ticket/2503 Closed Bugs ______________________ ===== Highest ===== [#1901] misdefined test method kills trial with an unhandled exception (opened by exarkun, closed by therve, fixed) defect trial http://twistedmatrix.com/trac/ticket/1901

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[Twisted-Python] Help -- can't install Twisted/Zope on x86_64 (RHEL5-beta)
by Margaret Lum 04 Mar '07

04 Mar '07

Hi folks, I'm trying to install Twisted/Zope on a 64-bit RHEL5 (beta) system with the following packages installed: mod_python-3.2.8-3.1 postgresql-python-8.1.4-1.1 python-2.4.3-18.fc6 python-2.4.3-19.el5 python-elementtree-1.2.6-5 python-krbV-1.0.13-4.el5 python-ldap-2.2.0-2.1 python-numeric-23.7-2.2.2 python-sqlite-1.1.7-1.2.1 python-urlgrabber-3.1.0-1 python-urlgrabber-3.1.0-2 This is the error I get when attempting to install both TwistedCore-2.5.0: python setup.py install Traceback (most recent call last): File "setup.py", line 20, in ? from twisted import copyright File "./twisted/__init__.py", line 22, in ? raise ImportError("you need zope.interface installed " ImportError: you need zope.interface installed (http://zope.org/Products/ZopeInterface/) And subsequently ../zope.interface-3.3.0: running install running build running build_py running build_ext building '_zope_interface_coptimizations' extension gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fPIC -I/usr/include/python2.4 -c src/zope/interface/_zope_interface_coptimizations.c -o build/temp.linux-x86_64-2.4/src/zope/interface/_zope_interface_coptimizations.o src/zope/interface/_zope_interface_coptimizations.c:15:20: error: Python.h: No such file or directory src/zope/interface/_zope_interface_coptimizations.c:16:26: error: structmember.h: No such file or directory Any quick tips would be appreciated. Thanks for your time. -- -Margaret

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[Twisted-Python] using a reactor in a loop
by Tom Brown 01 Mar '07

01 Mar '07

Hello, I am trying to use a reactor in a loop. The application will go through the loop twice then hang when trying to stop the protocol. Here's my loop: def main(): factory = Factory() factory.numProtocols = 0 factory.protocol = AqapProtocol while True: print 'running server' # do other work ... reactor.listenTCP(48555, factory) reactor.run() # stopped by protocol Here's how the protocol stops the reactor: def connectionLost(self, reason): self.factory.numProtocols -= 1 if not self.factory.numProtocols: print 'stopping reactor' reactor.stop() print 'reactor stopped' I see the 'reactor stopped' get printed out twice through the loop but I don't see 'running server' get printed out a third time. So, reactor.run() is not returning. I must be missing something or going at this completely wrong. Any suggestions? Thanks, Tom

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[Twisted-Python] factory class has no __class__ attribute!
by John Pote 01 Mar '07

01 Mar '07

Hi everyone, Justed started out to get a twisted http server going. typed in example 4.2 from Fettig's book but when I run it this strange error is reported: twisted ver:2.5.0 python ver:2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)] Traceback (most recent call last): File "dataServe.py", line 31, in ? reactor.listenTCP(8000, myhttpFactory) File "c:\apps\python\244\lib\site-packages\twisted\internet\posixbase.py", line 467, in listenTCP p.startListening() File "c:\apps\python\244\lib\site-packages\twisted\internet\tcp.py", line 739, in startListening log.msg("%s starting on %s" % (self.factory.__class__, self._realPortNumber)) AttributeError: class myhttpFactory has no attribute '__class__' anyone shed any light on this? Also, for your information, I tried Fettig's example 2.6 'dataforward.py'. This works fine on my Linux box but just hangs on my win XP box. using Py 2.4.4 and Twisted 2.5.0 on winXP and Centos4.4 Linux. Regards, John Pote source code import sys from twisted.web import http class httpRequests(http.Request): pages = { '/': '<h1>Home</h1>Home page', '/test':'<h1>Test</h1>Test page', } def process(s): if s.pages.has_key(s.path): s.write(s.pages[s.path]) else: s.setResponseCode(http.NOT_FOUND) s.write("<h1>Not Found!</h1>Sorry, no such page.") s.finish() class httpProtocol(http.HTTPChannel): requestFactory = httpRequests class myhttpFactory(http.HTTPFactory): protocol = httpProtocol if __name__ == "__main__": from twisted.internet import reactor from twisted._version import version print "twisted ver:"+version.short() print "python ver:"+sys.version reactor.listenTCP(8000, myhttpFactory) reactor.run()

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[Twisted-Python] Foolscap: CopyableSlicer has no streamable attribute?
by kgi 01 Mar '07

01 Mar '07

Hi all. I'm using Foolscap in a project with many disparate types and am gradually learning all the ins and outs of sending these all over the place. I've got an exception occurring that is stumping me. I think it may be a bug in Foolscap, but I don't know enough about the inner workings to be sure. The error is: 'CopyableSlicer' object has no attribute 'streamable' Which occurs here (I'm using SVN Foolscap, BTW): > /usr/lib/python2.4/site-packages/foolscap/banana.py(312)pushSlicer() (Pdb) l 312 -> itr = slicer.slice(topSlicer.streamable, self) 313 next = iter(itr).next (Pdb) whatis topSlicer <class 'foolscap.copyable.CopyableSlicer'> (Pdb) dir(topSlicer) ['__class__', '__delattr__', '__dict__', '__doc__', '__getattribute__', '__hash__', '__implemented__', '__init__', '__module__', '__new__', '__providedBy__', '__provides__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', '__weakref__', 'childAborted', 'describe', 'obj', 'opentype', 'parent', 'registerReference', 'sendOpen', 'slice', 'sliceBody', 'slicerForObject', 'slices', 'trackReferences'] So the error happened when trying to access topSlicer.streamable, and indeed, dir() shows there is no such attribute on the object, which is of type CopyableSlicer. Now, CopyableSlicer is defined like this: class CopyableSlicer(slicer.BaseSlicer): """I handle ICopyable objects (things which are copied by value).""" def slice(self, streamable, banana): yield 'copyable' copytype = self.obj.getTypeToCopy() assert isinstance(copytype, str) yield copytype state = self.obj.getStateToCopy() for k,v in state.iteritems(): yield k yield v def describe(self): return "<%s>" % self.obj.getTypeToCopy() registerAdapter(CopyableSlicer, ICopyable, tokens.ISlicer) So it overrides slicer.BaseSlicer.slice(). Now, in slicer.BaseSlicer, we see: class BaseSlicer: __metaclass__ = SlicerClass implements(tokens.ISlicer) .... def slice(self, streamable, banana): # this is what makes us ISlicer self.streamable = streamable assert self.opentype for o in self.opentype: yield o for t in self.sliceBody(streamable, banana): yield t Note the line following the comment, "# this is what makes us ISlicer" sets a 'streamable' attribute on the object in the base class, but the subclass doesn't preserve this behaviour. Is this a bug, or is my exception being caused by something else? Regards, Ricky

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[Twisted-Python] Making a duck-typed traceback from a Failure
by Jonathan Lange 01 Mar '07

01 Mar '07

Hello, I've recently been doing work with Twisted tests from within the Zope testrunner. It's a real pain because if the tests or their callbacks raise exceptions, no traceback gets given to the result object. See #2495. The fix I've uploaded doesn't actually help me. By the time the result object gets the failures, they've been cleaned with cleanFailure -- Failure.tb is None and everything is a string. Is it possible to make a duck-typed traceback from a cleaned Failure? I haven't really looked into it, but I can't think of why not off the top of my head. Granted I ran out of thought gluons a couple of hours ago. cheers, jml

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