Mailman 3 September 2003 - Twisted

[Twisted-Python] clean up app.getApplication
by Paul Boehm 28 Sep '03

28 Sep '03

i was doing something else, couldn't quite understand the code at first (where does the listcomp begin, where does it end?), so here's a more explicit version: Index: app.py =================================================================== RCS file: /cvs/Twisted/twisted/application/app.py,v retrieving revision 1.3 diff -u -r1.3 app.py --- app.py 21 Sep 2003 01:07:23 -0000 1.3 +++ app.py 27 Sep 2003 22:16:16 -0000 @@ -81,9 +81,14 @@ return None def getApplication(config, passphrase): - s = [(config[t], t) - for t in ['python', 'xml', 'source', 'file'] if config[t]][0] - filename, style = s[0], {'file':'pickle'}.get(s[1],s[1]) + for t in ['python', 'xml', 'source', 'file', 'tapdir', None]: + style = t + filename = config[style] + if filename: + break + if style == 'file': + style = 'pickle' + try: log.msg("Loading %s..." % filename) application = service.loadApplication(filename, style, passphrase)

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[Twisted-Python] Re: [Twisted-commits] crud
by James Y Knight 27 Sep '03

27 Sep '03

On Saturday, September 27, 2003, at 10:46 AM, exarkun CVS wrote: > ViewCVS links: > http://twistedmatrix.com/users/jh.twistd/viewcvs/cgi/viewcvs.cgi/ > sandbox/exarkun/ > crud.py.diff?r1=text&tr1=1.1&r2=text&tr2=1.2&cvsroot=Twisted None of the links in the cvs commit mails work, probably as they don't point to cvs.twistedmatrix.org. James

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[Twisted-Python] twisted.news adbapi backend
by Stephen C. Waterbury 27 Sep '03

27 Sep '03

I'm guessing this has never been used (at least with pyPgSQL, anyway), since it has a function listRequest defined thusly: def listRequest(self): # COALESCE may not be totally portable # it is shorthand for # CASE WHEN (first parameter) IS NOT NULL then (first parameter) ELSE (second parameter) END sql = """ SELECT groups.name, COALESCE(MAX(postings.article_index), 0), COALESCE(MIN(postings.article_index), 0), groups.flags FROM groups LEFT OUTER JOIN postings ON postings.group_id = groups.group_id GROUP BY groups.name, groups.flags ORDER BY groups.name """ return self.runQuery(sql) ... but PostgreSQL doesn't implement a COALESCE command. And my next guess would be that it's never been tested, either. Correct? If so, maybe it should be either be fixed or jettisoned, or at least relegated to the sandbox. - Steve.

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[Twisted-Python] Book on Twisted?
by mertz＠gnosis.cx 27 Sep '03

27 Sep '03

Twisties: I reckon most of you saw my series of articles on Twisted over at IBM developerWorks. Heck, a small thread on this list even criticized some of my examples :-). Anyway, in response to my articles, a publisher approached me; and basically asked me to write a book on Twisted for them (the note was a little less straightforward than this, but that's the jist). FWIW, I do not want to write a book on Twisted--at least not by myself. However, I -do- think that having a good book--one that was helpful and approachable to beginners--would be really nice to have on my shelf. So the idea picques my interst somewhat. There are several things readers of this missive might do with the information. If someone else just has the notion of writing a book themselves, I am very happy to put you in touch with my publishing contact. I cannot state one way or another whether this would be the best publisher for such a book, but at least there's an incling of interst there. On the other hand, if someone is kinda intersted in writing a book but unsure about the writing process, I might be interested or willing to have a role in such a process. Maybe contributing author, active editor, tech reviewer, or something else; obviously, if I have a role, I'll have an interest, but I don't know what the details might be. Yours, David... -- Keeping medicines from the bloodstreams of the sick; food from the bellies of the hungry; books from the hands of the uneducated; technology from the underdeveloped; and putting advocates of freedom in prisons. Intellectual property is to the 21st century what the slave trade was to the 16th.

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[Twisted-Python] adbapi question
by Ruslan Spivak 26 Sep '03

26 Sep '03

Hello. from twisted.enterprise import adbapi from twisted.internet import reactor from twisted.spread import pb DB_HOST = "localhost" DB_USER = "root" DB_PASSWD = "xxx" DB_NAME = "account" class DBException(pb.Error): pass dbpool = adbapi.ConnectionPool("MySQLdb", host=DB_HOST, user=DB_USER, passwd=DB_PASSWD, db=DB_NAME) # Database checking def getClientsDBParams(username): _sql = """ SELECT username, password, ip, netmask, mac FROM bunkernet_clients WHERE username='%s' """ % username return dbpool.runQuery(_sql) def dbClientSucceeded(self, l): if l: print l else: print "no records" raise DBException("No records") def dbClientFailed(): print "Failed!" reactor.stop() getClientsDBParams('alienoid').addCallbacks(dbClientSucceeded, dbClientFailed) reactor.run() The problem here is that when dbClientSucceeded is executed and i get "no records" - i don't get exception. Only when i press Ctrl + C on server i get those DBException. This code will be executed when remote client connects to server and i want those DBException be passed to remote client but i can't get it, can get it only with Ctrl + C Your help is very appreciated. Thanks in advance. Best regards, Ruslan

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[Twisted-Python] please remove sibling,parents etc. from plugins.tml
by Paul Boehm 26 Sep '03

26 Sep '03

they're still in plugins.tml in cvs

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[Twisted-Python] twisted.python.log usage...
by Miguel Marques 26 Sep '03

26 Sep '03

Greetings... I've just started using twisted and I have a question about logging. I have a server which uses twisted.python.log. I open a file and then call log.startLogging with it. I then start a number of worker threads and then instantiate an Application and run it. All log.msg from the main program have the server name I passed when I instantiaed the Application. When I call log.msg from the threads the name is just [-]. I know I can call msg with system='servername' everytime but I thought that I could have the lass that implements the running worker threads inherit from Logger and override logPrefix but that doesn't seem to work. I obviously (or so I think) need to insert system='servername' in the ILogContext for each of my threads but it isn't all that clear to me how to do that. I'm confused (and I don't even have an opulent toilet ;-) ) TIA for any help... Miguel C. Miguel Marques, Development Services, Computing and Network Services, York University e-mail: miguel at yorku.ca, voice: (416)736-2100x22684, fax: (416)736-5830

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[Twisted-Python] a little pattern prototype ?
by Timothy Stebbing 26 Sep '03

26 Sep '03

This is just a very basic and incomplete prototype of a framework/pattern based on twisted.web.resource. Id be interested in peoples comments on the concept as a whole. Okay, The idea is that you create many components 'facets' which return a particular chunk of html that will be displayed inside an absolutly positioned <div>. These facets will be able to communicate with each other via the concept of 'broadcasters' and 'observers'. What this means is that a facet can register its wish to be notified of a particular event, or a facet can broadcast an event to all other facets. Facets are combined into single html pages (prisms), which will manage placing facet content in divs. A single facet can appear on mny prisms. A special type of facet that Im yet to implement is called the 'request facet'. This will have no render output, but will manage post, get values by broadcasting them to other facets. This could also handle any events, ie livePage. This might be a stupid idea, thats why Im posting it now while Im prototyping it so I can get suggestions/flames. Its just something that I thought up at work the other day and thought might be interesting to try. -tjs See attached tarball.

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[Twisted-Python] twisted and python 2.1.3
by Erik A.Dahl 25 Sep '03

25 Sep '03

I'm using twisted and some other python libraries (zope) and would like to use them together. Of course zope is still back in the 2.1.3 days of python. If I were to deal with defining True and False where needed would there be other compatibility issues with 2.1.3 and twisted? -EAD

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[Twisted-Python] node with html content
by suneetha＠sonic.net 24 Sep '03

24 Sep '03

Hi, request.d.createTextNode(data) creates a text node and display the data in the browser. I wanted to return a node in generate() method, that display a web form instead of displaying the text. I created the node with html content(string). Since I used createTextNode method, it is displaying the html source instead of form. Is there any other method that creates this kind of Node? If not how do I slove this? Thank you, Sunita.

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