Mailman 3 June 2004 - Twisted

[Twisted-Python] stolen
by bob＠redivi.com 11 Jun '04

11 Jun '04

is the pic a fake?

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[Twisted-Python] Multicast Server and Client Question
by Baillargeon, Sonny 09 Jun '04

09 Jun '04

Hello, I am new to twisted and python and most of experience is in ksh and perl. I am trying to write a multicast client and server application. I am not sure if this is working since I can't find a way to write to a multicast group. This is what I have for the listener: from twisted.internet.protocol import DatagramProtocol from twisted.internet.udp import MulticastMixin from twisted.internet import reactor class EchoMulticast(DatagramProtocol): def datagramReceived(self, datagram, address): self.transport.write(datagram,address) def main(): reactor.listenMulticast(7774, EchoMulticast(), "224.7.7.74") reactor.run() if __name__== '__main__': main() Unfortunately, there is no connectMulticast class. How would I write to a Multicast group? Would I do a join to a Multicast group and write UDP packets? The connectUDP does not allow me to write to a multicast network and port. Thanks, Sonny <FONT SIZE = 1>**************************************************************************** This e-mail and any attachments may contain confidential and privileged information. If you are not the intended recipient, please notify the sender immediately by return e-mail, delete this e-mail and destroy any copies. Any dissemination or use of this information by a person other than the intended recipient is unauthorized and may be illegal. Unless otherwise stated, opinions expressed in this e-mail are those of the author and are not endorsed by the author's employer.</FONT>

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[Twisted-Python] twistd and SSL pass phrase
by Mike Mueller 06 Jun '04

06 Jun '04

When I run my SSL server with twistd -ny it prompts me to enter the PEM pass phrase. But where can I enter it if it runs in the background, i.e twistd -y? Thanks, Mike

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[Twisted-Python] mapped resultsets for adbapi: "runQueryMapped"
by Stephen Waterbury 04 Jun '04

04 Jun '04

Gang, I don't know whether this is of interest to anyone else, but I needed it for my stuff and I was hoping it might be suitable for inclusion in adbapi: it defines a new adbapi.ConnectionPool method called 'runQueryMapped' (and corresponding '_runQueryMapped') whose return value is a list of dicts that map column names to values (rather than the list of lists of values that runQuery returns). Attached are patches for adbapi.py and test_enterprise.py. Pros: * shouldn't break any existing code, as it is a completely separate method from runQuery and _runQuery. * portable, should work with any DBAPI-conforming adaptor, since it builds the dictionaries from the cursor.description, which is part of the DBAPI spec. The reason I needed to do this inside of adbapi is that adbapi doesn't expose cursor.description ... which is fine, as it seems cleaner to keep it inside adbapi anyway. * unit test included (I've only run the test against SQLite, pyPgSQL, and psycopg, as I don't have the others installed on my machine). Cons: * only one I can think of is that it's unnecessary if you are using either reflector, which I'm not, or pyPgSQL's 'PgResultSet' attributes based on the cursor's column names, which I was but am not any more, since that is not portable and not part of the DBAPI spec. While modifying my code to work with other backends (esp. psycopg and sqlite), I came up with this. If it's decided not to include it, that's okay, I'll just keep patching my Twisted source. It's also fine if you want to name it something else. :) Cheers, Steve

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Re: [Twisted-Python] mapped resultsets for adbapi:
by dave＠krondo.com 04 Jun '04

04 Jun '04

Would you mind posting this patch to the tracker? http://www.twistedmatrix.com/users/roundup.twistd/twisted thanks, dave ---- Original Message ---- From: Stephen Waterbury Date: Thu 6/3/04 23:43 To: twisted Subject: [Twisted-Python] mapped resultsets for adbapi: "runQueryMapped" Gang, I don't know whether this is of interest to anyone else, but I needed it for my stuff and I was hoping it might be suitable for inclusion in adbapi: it defines a new adbapi.ConnectionPool method called 'runQueryMapped' (and corresponding '_runQueryMapped') whose return value is a list of dicts that map column names to values (rather than the list of lists of values that runQuery returns). Attached are patches for adbapi.py and test_enterprise.py. Pros: * shouldn't break any existing code, as it is a completely separate method from runQuery and _runQuery. * portable, should work with any DBAPI-conforming adaptor, since it builds the dictionaries from the cursor.description, which is part of the DBAPI spec. The reason I needed to do this inside of adbapi is that adbapi doesn't expose cursor.description ... which is fine, as it seems cleaner to keep it inside adbapi anyway. * unit test included (I've only run the test against SQLite, pyPgSQL, and psycopg, as I don't have the others installed on my machine). Cons: * only one I can think of is that it's unnecessary if you are using either reflector, which I'm not, or pyPgSQL's 'PgResultSet' attributes based on the cursor's column names, which I was but am not any more, since that is not portable and not part of the DBAPI spec. While modifying my code to work with other backends (esp. psycopg and sqlite), I came up with this. If it's decided not to include it, that's okay, I'll just keep patching my Twisted source. It's also fine if you want to name it something else. :) Cheers, Steve _______________________________________________ Twisted-Python mailing list Twisted-Python(a)twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python

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[Twisted-Python] P2P in Twisted?
by Samuel Reynolds 04 Jun '04

04 Jun '04

Has anyone done a P2P protocol in Twisted? I have a potential workgroup sharing application and I'd just as soon not start from scratch if I don't have to. - Sam __________________________________________________________ Spinward Stars, LLC Samuel Reynolds Software Consulting and Development 303-805-1446 http://SpinwardStars.com/ sam(a)SpinwardStars.com

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[Twisted-Python] What does the LGPL mean in terms of python?
by Chris Green 03 Jun '04

03 Jun '04

Hey folks, I've checked out the archives but almost everything I've read just amounted to "it's under the LGPL, read that". I understand the LGPL with regards to the classic case of C libraries. You can call the public functions, even add your own new public functions but the code that is in the library itself has to be released under the terms of the LGPL. The examples in the LGPL of using just the header file doesn't really map into python. For example, is a subclass a derivative work? By the LGPL, it seems to be since it's combined completely with the code that is under the LGPL. Let's say I had ChatServer derived from TCPServer, is it the intent of the licensing that my code must be placed under the LGPL? If subclassing is allowed to occur and those new classes can be placed under any license the user desires, it seems that any licensing inconvenience that doesn't involve cutting and pasting code can be worked around by merely extending the existing classes. If it's not allowed, I'm still not sure what the boundary lines are. This would be great information to add to the FAQ and include with the distribution as licensing clarifications and what the intent of the licensing scheme is. Thanks, Chris -- Chris Green <cmg(a)dok.org> Warning: time of day goes back, taking countermeasures.

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[Twisted-Python] changing package manifest to allow RPMs to build
by Chris Green 03 Jun '04

03 Jun '04

Hey folks, Here's a simple patch to just include everything under the twisted directory rather than including things one by one. This is needed to make a working sdist ( and in turn, a working rpm build ). After this, python setup.py bdist_rpm seems to work well. -- Chris Green <cmg(a)dok.org> To err is human, to moo bovine.

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[Twisted-Python] Linda?
by Clark C. Evans 03 Jun '04

03 Jun '04

Hello. I was just "playing" with a Python implementation of Linda by Andrew Wilkinson [1]. I was musing what a Linda-style reactor would look like and if it would be valueable. In particular, I've been musing how generators could be used in the context of Linda, and how this could complement the Deferred event queue in Twisted. Best, Clark [1] http://www-users.cs.york.ac.uk/~aw/pylinda/

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[Twisted-Python] Twisted Service Components for BSDDB
by Bill la Forge 02 Jun '04

02 Jun '04

In the 040602 release, the EnvSvc and DbSvc classes are provided. These classes support the full spectrum of configurations possible with BSDDB. http://compstrm.sourceforge.net/twcs/bsddb.html I would also like to credit the atop project to which I made frequent references while developing these classes. I would note that EnvSvc and DbSvc depend only on TieredService and are not, in general, dependent on other classes in CompStrm. (Though the examples draw heavily on CompStrm.) Glyph, if there is any interest in these classes, I'd be glad to consign the copyright to you. ===== Bill la Forge http://www.geocities.com/laforge49/ ________________________________________________________________________ Yahoo! India Matrimony: Find your partner online. http://yahoo.shaadi.com/india-matrimony/

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Twisted June 2004