Mailman 3 March 2011 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz 06 Aug '21

06 Aug '21

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. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |_____| |_____ | | | | @ t w i s t e d m a t r i x . c o m http://www.twistedmatrix.com/~glyph/

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01 May '19

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[Twisted-Python] regarding xml elements
by Raj kumar 03 Oct '13

03 Oct '13

Hi, I have an xml file in my application, I have created an element using Example goes like this......... document.createElement("abc") and i appeneded it by using append() method. But how i can reflect this change to my xml file? and one more thing is i want to create element with some other parameters.... like............. <abc m=" " n=" "> </abc> and i have m and n values as strings with me. can anybody help me to create this element and write it to the existing xml file as a child of an existing element? Thanks in advance.. Raj.. Forgot the famous last words? Access your message archive online at http://in.messenger.yahoo.com/webmessengerpromo.php

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[Twisted-Python] Get IP of connecting client in XMLRPC server
by Remy C. Cool 28 Apr '13

28 Apr '13

Hello, On 18 May 2004, the following message was posted to this mailinglist: Jp Calderone exarkun at divmod.com wrote: >Daniel Newton wrote: > > I have a simple XML-PRC server similar to the example below: > > from twisted.web import xmlrpc, server > > class Example(xmlrpc.XMLRPC): > """An example object to be published.""" > > def xmlrpc_add(self, a, b): > """Return sum of arguments.""" > return a + b def xmlrpc_whatIsMyAddress(self): return self.transport.getPeer().host > > if __name__ == '__main__': > from twisted.internet import reactor > r = Example() > reactor.listenTCP(7080, server.Site(r)) > reactor.run() > > I want to be able to get the address of the client that calls the xmlrpc > method can anyone help me with this? This solution didn't work because 'transport' isn't a property of the Example class. I'm currently in the process of changing from a customized SimpleXMLRPCServer to a twisted XMLRPC server solution and I need to insert the client IP into the attributes passed to the called xmlrpc method. Anyone who knows the answer and is willing to share the info? Regards, Remy

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[Twisted-Python] http.Request and JSON
by Vincent Gulinao 26 Jan '12

26 Jan '12

How do you read JSON content from a POST using http.Request. I peeked on args and it's empty. TIA.

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[Twisted-Python] Asynchronous context in Twisted
by Fantix King 07 Apr '11

07 Apr '11

Hi, I tried to make python.context work in asynchronous code between main loops. Anyone has similar experience to share please? Not sure if I am rebuilding a wheel :P http://code.google.com/p/little-site/source/browse/littlesite/custom_reacto… BR, Fantix.

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[Twisted-Python] Announcing Twisted 11.0.0pre2!
by Jessica McKellar 02 Apr '11

02 Apr '11

Having done the builds with two curious guinea pigs by my side, we are triply pleased to announce the second 11.0.0 pre-release. Tarballs for the second pre-release are available at: <http://twistedmatrix.com/~jesstess/11.0.0pre2/> The main differences between this release and the first pre-release are changelog and setup.py tweaks. Please test aggressively! Barring the discovery of regressions, we are going to cut a final release *this weekend (April 2/3)*. Many thanks to thijs and exarkun for feedback and improvements on the first pre-release, and to glyph for overseeing the pre-release process. -Jessica

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[Twisted-Python] running several services from a single app
by Aljoša Mohorović 01 Apr '11

01 Apr '11

is it possible to run several services from a single app? i currently have a few services/apps and would like to put them all into a single app so i can use cx_freeze to create a single exe file for windows to allow easy testing. Aljosa maybe something like this: -------------------------------------------------------- factory1 = protocol.ServerFactory() factory1.protocol = Protocol1 application1 = service.Application("Server1") internet.TCPServer(8000, factory1).setServiceParent(application1) factory2 = protocol.ServerFactory() factory2.protocol = Protocol2 application2 = service.Application("Server2") internet.TCPServer(9000, factory2).setServiceParent(application2) reactor.listenTCP(8000, factory1) reactor.listenTCP(9000, factory2) reactor.run() --------------------------------------------------------

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[Twisted-Python] Failure is O(state) vs Exception
by John Arbash Meinel 31 Mar '11

31 Mar '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm doing some performance testing of one of our Twisted applications. And what I came across was a surprising amount of time being spent in twisted.python.failure.Failure.__getstate__ We're doing a fair amount with exceptions. And under cProfile, I found this: 29 0 0.4081 0.2940 twisted.python.failure:416(__getstate__) +34492 0 0.1141 0.0235 +twisted.python.reflect:557(safe_repr) So under profiling, we spent 408ms in __getstate__. I then changed Failure.cleanFailure to just 'return', and I saw a real-world improvement of ~480ms down to about 240ms. I then restored cleanFailure, but changed Failure.__init__ to always set 'tb=None' before it does anything. And in that case the time went down to 180ms. (And when I dug into it, 150ms of that is time spent waiting for an XMLRPC response.) I'm wondering if there is a tasteful way to disable Traceback processing in a production machine. I realize you never know when you are going to need the state in order to figure out what went wrong. But it is costing 2-5x runtime speed. (The other answer is to write all of our code to avoid Deferred.addErrback...) In our case, there are many exceptions that are used as 'signaling' rather than indicating a real failure. I suppose one option would be a whitelist/blacklist that would indicate whether a given exception class is worthy of a traceback. Thoughts? John =:-> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk2QntIACgkQJdeBCYSNAAPNPACeNtNUb1mifyTTSpAymcktWwQg 3UAAoLcbbADvaj2QYSxkgFnRdmmWjtPm =SLqh -----END PGP SIGNATURE-----

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[Twisted-Python] Deferred documentation.
by Jasper St. Pierre 31 Mar '11

31 Mar '11

On IRC, exarkun, glyph, spiv and idnar encouraged me to do a bit of work on the Defer documentation. I kept get confused between the things like returning a Deferred from a callback and chainDeferred, which I found out wasn't that useful: <idnar> I suppose it's useful for "forking" a deferred <idnar> you have an "existing" deferred <idnar> and you want a "new" deferred that starts with the value from the end of the existing deferred's callback chain <idnar> but you don't want the rest of the existing deferred's callback chain to be affected by the new deferred's callback chain <idnar> that's still not really a use case though, just a description of the situation that must arise in the use case <idnar> I guess I should search for actual uses of chainDeferred Well, I was getting frustrated myself, and I suggested to fix the docs once and for all. People pointed me to three documents, all of which felt way too dense for me: http://twistedmatrix.com/documents/current/core/howto/defer.html http://twistedmatrix.com/documents/current/core/howto/gendefer.html http://twistedmatrix.com/documents/current/core/howto/deferredindepth.html Jessica also pointed me to http://twistedmatrix.com/trac/ticket/3943, which admittedly I haven't read yet. So, I started writing. I opened up a session of emacs, and produced two things: http://magcius.mecheye.net/twisted/DeferHowTo-Rewrite.html http://magcius.mecheye.net/twisted/DeferHowTo-Fixup.html Sources: http://magcius.mecheye.net/twisted/DeferHowTo-Rewrite.rst http://magcius.mecheye.net/twisted/DeferHowTo-Fixup.lore The former is a tutorial that I tried to make informal as possible, and the latter is a fixup and rewrite of defer.xhtml stuff to make it a bit less, uh, dense. My eventual goal is to reduce the number of documentation about defer down to a near-impossible two documents. I'm hoping to merge some of the good stuff of the other thousands of documents. Thoughts so far?

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