Mailman 3 February 2004 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz 05 Aug '21

05 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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[Twisted-Python] Any one available for contract work?
by Itamar Shtull-Trauring 28 Feb '04

28 Feb '04

Knowledge of web services and ebXML would be useful.

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[Twisted-Python] Typo in /twisted/test/test_enterprise.py - Twisted 1.2 RC2
by Paul Reznicek 28 Feb '04

28 Feb '04

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RE: [Twisted-Python] SSH connection
by Schollnick, Benjamin 28 Feb '04

28 Feb '04

> Summary - you need to install PyCrypto, and if you do it from source > that means you need to do it with a compiler installed. You can use > mingw compiler with a bit of work (there's a howto somewhere), or you > can find a pre-compiled version. I have looked and have not yet found a pre-compiled version.... Do you have any suggestions on where to find a pre-compiled version of PyCrypto. > http://webcleaner.sourceforge.net/ has instructions on compiling > pycrypto on windows. Compiling it, at least in the complicated version of the MingW instructions, makes me nervous... For now, I'll be forced to hold off, or come up with a alternative.... - Benjamin

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[Twisted-Python] Components
by James Y Knight 28 Feb '04

28 Feb '04

So I want to merge the changes from Nevow that allow lazy adapter registration via string arguments to registerAdapter: registerAdapter("nevow.freeform.StringRenderer","nevow.formless.String", "nevow.freeform.ITypedRenderer") However, doing this necessarily means the removal of the implicit super-interface feature, where twisted automatically registers StringRenderer for all super-interfaces of ITypedRenderer. As there is no way to look up the super-interfaces of a string at registerAdapter time (without loading up the module), this feature cannot stay. I also doubt that's actually used by anyone. I can't think of a reason why I'd want to do that. The test suite doesn't even test it: all tests pass after removing it. There is a test for the behavior of the components.superInterfaces function, but not for actually registering adapters. Also, the current behavior is pretty much arbitrary and wrong: >>>> from twisted.python.components import * class IFoo(Interface): pass class IBaz(IFoo): pass class MyIFooAdapter(Adapter): pass class MyIBazAdapter(Adapter): pass registerAdapter(MyIBazAdapter, str, IBaz) registerAdapter(MyIFooAdapter, str, IFoo) <<<< Results in: >>>> Traceback (most recent call last): File "<stdin>", line 1, in ? File "twisted/python/components.py", line 214, in registerAdapter raise ValueError( ValueError: an adapter (__main__.MyIBazAdapter) was already registered. <<<< However, registerAdapter(MyIFooAdapter, str, IFoo) registerAdapter(MyIBazAdapter, str, IBaz) works fine. Depending on the order of adapter registration seems quite fragile to me. The only proper way to handle this would be to have a concept of 'depth' ala PyProtocols. James

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[Twisted-Python] Distutils dependencies sprint at PyCon?
by Phillip J. Eby 27 Feb '04

27 Feb '04

Bob Ippolito and I have been talking about working on distutils dependency support while at PyCon. The subject has recently come up on both the Zope3-Dev and Twisted mailing lists, with respect to being able to: 1) break up monolithic systems (PEAK, Zope, Twisted) into smaller package sets with dependencies 2) allow dependencies on other systems (e.g. Twisted using PyProtocols, PEAK using zope.publisher, etc.) 3) support painless install for end users (single command to download and install "everything needed") even at the cost of a little pain for the packager(s). 4) allow dependencies on packages that were packaged with the distutils, but *not* specifically designed to work with the dependency system. In other words, if I want to depend on package X, I should not need to bug package X's author, I should be able to "just do it". 5) Support Python 2.2, while not requiring changes to the distutils, but being a possible candidate for upgrades to the distutils in 2.4. If there's a group that would like to sprint to produce working deliverables for one or more aspects of this problem area (and I think PIMP/PackMan shows that solutions are within reach), I'd like to get some schedule commitments so I can plan a trip. I wasn't originally planning to go to PyCon this year, but I *will* come if it means we can get this thing implemented. If there is sufficient interest, let's take this to an appropriate mailing list (perhaps distutils-sig?) and Wiki to put together a detailed set of stories, as long as we can prioritize the list according to the needs of the folks who will be doing the development. If you're interested in participating in such a sprint, please let me know ASAP, so I can make travel arrangements. Thanks. (Please reply to me personally rather than to the list(s); I will summarize and post an announcement of where to direct further discussion, if there's enough interest to get this off the ground. Thanks!)

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[Twisted-Python] PB over SSH
by John Landahl 27 Feb '04

27 Feb '04

I've hacked up a working implementation of PB over SSH (Conch) if anyone is interested. It's a convienient way to have both transport security and authentication for PB sessions. I've implemented a version in plain Twisted and one using PEAK+Twisted. The code is a little rough, but if there's any interest I can clean it up for general consumption.

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Re: [Twisted-Python] Second try at reporting gtk reactor problem
by exarkun＠divmod.com 27 Feb '04

27 Feb '04

On Fri, 27 Feb 2004 08:17:31 -0800, "David E. Konerding" <dekonerding(a)lbl.gov> wrote: >Hello, since nobody actually responding with a useful message regarding > my report, I'm > reposting an extremely simple (1 page) example which exhibits the behavior. > My example creates a gtkreactor and runs it. A small reporter class is > run from a second thread. > Under the gtk reactor, the log messages from the second thread are not > reported in a timely > fashion (only once per second or so). From my understanding the > messages should be printed more frequently (about once every 1/10th > second). This does work under the wx and plain reactors, so I suspect > there is a defect in the gtk reactor. > I would simply like to get a confirmation that my example is a valid > one, that the results I expect are valid, and that other > people can reproduce my experience. If that is the case then I will > submit a formal bug report. All of this should be reproducible using > Twisted 1.2.0. Things get even weirder if you remove the logging > support and replace it with all print statements. When I run this program, here is the output: exarkun@boson:~$ python p.py 2004/02/27 12:36 EST [-] Log opened. 2004/02/27 12:36 EST [-] 'ticker: 1077903388' 2004/02/27 12:36 EST [-] 'ticker: 1077903389' 2004/02/27 12:36 EST [-] 'ticker: 1077903390' 2004/02/27 12:36 EST [-] 'ThingyManager submitting' 2004/02/27 12:36 EST [-] TestThingy created 2004/02/27 12:36 EST [-] 'ThingyManager created' 2004/02/27 12:36 EST [-] 'ThingyManager calledInThread' 2004/02/27 12:36 EST [-] 'ticker: 1077903391' 2004/02/27 12:36 EST [-] 'ticker: 1077903392' 2004/02/27 12:36 EST [-] 'ticker: 1077903393' 2004/02/27 12:36 EST [-] 'ticker: 1077903394' 2004/02/27 12:36 EST [-] TestThingy run 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] 'ticker: 1077903395' 2004/02/27 12:36 EST [-] 'ticker: 1077903396' 2004/02/27 12:36 EST [-] 'ticker: 1077903397' 2004/02/27 12:36 EST [-] 'ticker: 1077903398' 2004/02/27 12:36 EST [-] 'ticker: 1077903399' 2004/02/27 12:36 EST [-] 'ticker: 1077903400' 2004/02/27 12:36 EST [-] 'ticker: 1077903401' 2004/02/27 12:36 EST [-] 'ticker: 1077903402' <- I hit ^C here 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] TestThingy message 2004/02/27 12:36 EST [-] TestThingy done 2004/02/27 12:36 EST [-] 'Reactor done' Jp

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RE: [Twisted-Python] SSH connection
by Phillip J. Eby 27 Feb '04

27 Feb '04

At 11:57 AM 2/27/04 -0500, Schollnick, Benjamin wrote: > > Summary - you need to install PyCrypto, and if you do it from source > > that means you need to do it with a compiler installed. You can use > > mingw compiler with a bit of work (there's a howto somewhere), or you > > can find a pre-compiled version. > >I have looked and have not yet found a pre-compiled version.... > >Do you have any suggestions on where to find a pre-compiled version of >PyCrypto. > > > http://webcleaner.sourceforge.net/ has instructions on compiling > > pycrypto on windows. > >Compiling it, at least in the complicated version of the MingW instructions, > >makes me nervous... Here's a simpler version of the instructions: 1) Get your machine set up to build extensions using the distutils 2) Download PyCrypto and run 'setup.py install' Step 1 is a bit more complex than step 2, but is worth the trouble because it means you can build any Python extension for Windows without the author needing to produce a binary package for you. It amounts to: a) Install MinGW or Cygwin. I personally prefer Cygwin because there aren't so many things to install. Just pop over to cygwin.com, click "install now", and be sure to include the GCC compiler when you're asked what packages you want. (DON'T install the Cygwin Python, btw, unless you have a good reason. You don't need it if you're building extensions for Windows Python.) Anyway, when you're done with the Cygwin install, you'll have a nice icon that opens up a Cygwin shell, which is a convenient prompt to run things from. b) ensure that the MinGW or Cygwin tools are on your system path. E.g. add 'C:\cygwin\bin' to your PATH. c) Do the steps to build a 'libpython2x.a' library. (Step 2 of "Setup for Windows" on the page shown.) d) add a distutils.cfg file to your C:\Python2x\Lib\distutils directory, containing the lines: [build] compiler=mingw32 this will make GCC your default compiler for any C extensions you build in future, so you won't need to do any of that '-c mingw32' junk. Once you've done this, you can happily run 'python setup.py install' to install C extensions.

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[Twisted-Python] SSH connection
by Schollnick, Benjamin 27 Feb '04

27 Feb '04

Paul, I am attempting to use Twisted, for a simple SSH connection... As a example, I am using "The Transport" example from the how to's... from twisted.conch import error from twisted.conch.ssh import transport from twisted.internet import defer class ClientTransport(transport.SSHClientTransport): def verifyHostKey(self, pubKey, fingerprint): if fingerprint != 'b1:94:6a:c9:24:92:d2:34:7c:62:35:b4:d2:61:11:84': return defer.fail(error.ConchError('bad key')) else: return defer.succeed(1) def connectionSecure(self): self.requestService(ClientUserAuth('user', ClientConnection())) But.... It appears that something was not installed with the installer? C:\develope\versions\test_code>ssh_test.py Traceback (most recent call last): File "C:\develope\versions\test_code\ssh_test.py", line 2, in ? from twisted.conch.ssh import transport File "C:\develope\Python23\Lib\site-packages\twisted\conch\ssh\transport.py", line 37, in ? from Crypto import Util ImportError: No module named Crypto I am assuming that there is a prequiste package that needs to be installed, presumably one of the multitude of Cryptography packages that I find on the Vaults of Parnassus.... Is this accurate? And if so, what package? On the assumption it is PyCrypto.... I tried to install PyCrypto... (The sad thing is that I'm running through all these hoops simply because I need to be able to make a SSH connection, and be able to read and write to the stream... (ala Telnetlib)) when I: setup.py install I receive: C:\develope\pycrypto-1.9a6>setup.py install running install running build running build_py running build_ext error: Python was built with version 6 of Visual Studio, and extensions need to be built with the same version of the compiler, but it isn't installed. Now I am running: C:\develope\pycrypto-1.9a6>python Python 2.3.2 (#49, Oct 2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> I also have win32-157 installed.... Is there some way around this compile issue, does anyone know of a precompiled Windows binary for the PyCrypto kit?? - Benjamin

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