Mailman 3 May 2003 - Twisted

[Twisted-Python] Installing the windows binary with Python 2.3a...
by Jeff Gerritsen May 22, 2003

May 22, 2003

Greetings, I'm a newbie to Twisted. I've downloaded the windows binary, tried to install under Python 2.3a and receive the error message "Python version 2.2 required, which was not found in the registry." What is the work around? Thanks, Jeff Gerritsen

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Re: [Twisted-Python] problem remotely calling mehod that returns a Deferred
by Tim Nagels May 22, 2003

May 22, 2003

Answered my own stupid question... I forgot i automatically closed my reactor after a certain period... I think I need some sleep(365444564) --- aso _________________________________________________________________ Receive your Hotmail & Messenger messages on your mobile phone with MSN Mobile http://www.msn.be/gsm/smsservices

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[Twisted-Python] problem remotely calling mehod that returns a Deferred
by Tim Nagels May 22, 2003

May 22, 2003

I'm having trouble remotely calling the userWelcome method... it returns a deferred with some databaseinformation... when I wanted to test to see how it handles delays...I used time.sleep(30)... then it seems to lose the connection and throws: twisted.spread.pb.PBConnectionLost i've tested it with 15, 10, 5 secs... and when I go below 5 secs it seems to work again...(as does removing the sleep line) Any ideas where the connection could be lost, can't seem to locate it... tnx code: … [View More]class FtpServFactory(pb.Root, pb.Perspective): .... def remote_takeInfo(self, info): print " got info:", info print dir(info) print info.name print info.welcome #pond.countFrogs() return "safe and sound" # positive acknowledgement .... def testcallb(self, resultlist): print "executing callback" time.sleep(5) #### if I let it sleep for less then 5 seconds, or I just remove the line return resultlist[0][0] #### the value is returned correctly... def failtestc(self, resultlist): print "failing callback" return resultlist def perspective_userWelcome(self, user): root = self.service.factory.root print dir(self) self.dbpool = adbapi.ConnectionPool("MySQLdb",host="localhost",db="pythonftpserv",port=3306 ,user="root",passwd="") self.db = FtpDatabase(self.dbpool) deff = self.db.getDescription("TascAdmin") deff.addCallbacks(self.testcallb,self.failtestc) return deff ################################################ ..... def main(): from FtpServer import FtpInfoClient # so it's not __main__.CopyPond inf = FtpInfoClient.CopyInfo() inf.initData("Johnny", """/temp/test.tst""", """2002-10-05""","""/temp""","You will find me another ...shrubbery!") reactor.callLater(5,reactor.stop) sender = Sender(inf) deferred = pb.getObjectAt("10.10.0.47", 8800, 50) deferred.addCallback(sender.got_obj) pb.connect("10.10.0.47", # host name 8880, # port number "guest", # identity name "guest", # password "FtpServer.ftp", # service name "guest", # perspective name (usually same as identity) None, # client reference, used to initiate server->client calls 50 # timeout of 30 seconds before connection gives up ).addCallbacks(connected, # what to do when we get connected failure) # and what to do when we can't reactor.run() def connected(perspective): deff = perspective.callRemote('userWelcome',"TascAdmin").addCallbacks(success, failure) deff.setTimeout(30) def fail(des): print "failed miserably" def gotdes(des): print "description "+desc def success(welcome): print welcome #welcome.addCallbacks(gotdes,fail) #reactor.stop() def failure(error): print error print dir(error) print "Failed to obtain quote.\n" #reactor.stop() if __name__ == '__main__': main() ----------- Aso _________________________________________________________________ [View Less]

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[Twisted-Python] non blocking wxPython
by Chris Liechti May 22, 2003

May 22, 2003

this is an example with wxPython + Twisted. it does not suffer from the problem of blocked Twisted when wx menus or dialogs are open because Twisted is run in a separate thread. on shutdown, twisted should be stopped first and then the GUI, in case some twisted callbacks use GUI components (which is the purpose of most GUIs, isn't it ;-) thread.join() can be used in wx event handler as it produces a deadlock in case a callback is ran that accesses the GUI, thus a loop with wxYield() is … [View More]used. running Twisted in a separate thread may break some functions, altough i had no problems here. an other drawback is that it uses the (evil ;-) threads so you get all the problems of threads too, in some cases a callFromThread may be required (for wx->twisted calls). i tested the example on win32, hope it runs as flawlessly on linux too. chris from wxPython.wx import * #~ if sys.platform == 'win32': #~ from twisted.internet import win32eventreactor #~ win32eventreactor.install() from twisted.internet import reactor from twisted.python import threadable threadable.init(1) import threading def startTwistedAndWx(app): """Start twisteds mainloop it its own thread, run the wx mainloop in the main thread""" global twistedthread reactor.startRunning() twistedthread = threading.Thread(target=reactor.mainLoop) twistedthread.start() app.MainLoop() def stopTwisted(): """stop the twisted thread, wx still runs""" global twistedthread reactor.stop() #wait until reactor has shut down while twistedthread.isAlive(): wxYield() ID_EXIT = 101 class MyFrame(wxFrame): def __init__(self, parent, ID, title): wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, wxSize(300, 200)) menu = wxMenu() menu.Append(ID_EXIT, "E&xit", "Terminate the program") menuBar = wxMenuBar() menuBar.Append(menu, "&File"); self.SetMenuBar(menuBar) EVT_MENU(self, ID_EXIT, self.DoExit) EVT_CLOSE(self, self.OnCloseWindow) self.text = wxTextCtrl(self, -1, "Text\n", style=wxTE_MULTILINE) reactor.callLater(0, self.twistedCallsMe, 0) def DoExit(self, event): self.Close(true) def OnCloseWindow(self, event): stopTwisted() self.Destroy() def twistedCallsMe(self, count): print count self.text.AppendText('%d\r\n' % count) reactor.callLater(0.5, self.twistedCallsMe, count + 1) class MyApp(wxApp): def OnInit(self): # Do whatever you need to do here self.frame = MyFrame(NULL, -1, "Hello, world") self.frame.Show(true) self.SetTopWindow(self.frame) return true def demo(): app = MyApp(0) startTwistedAndWx(app) if __name__ == '__main__': demo() [View Less]

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[Twisted-Python] Suggestion - remove bin/coil in 1.0.6
by Itamar Shtull-Trauring May 21, 2003

May 21, 2003

Anyone disagree? -- Itamar Shtull-Trauring http://itamarst.org/ http://www.zoteca.com -- Python & Twisted consulting

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[Twisted-Python] deleting server with coil
by Tim Nagels May 21, 2003

May 21, 2003

I'm having some trouble unListening when I use coil it seems when you start a server using the coilwebinterface, it starts using listentcp in the same app that is already running.. this makes that bindPorts is not called, so when you unlisten the userdict doesnt contain the needed port... I could always add it manually...but that seems a bit stupid.. shouldn't listenTcp automatically add itself to self._listenerDict? what is done with bindPorts... (btw calling bindPorts after you've run app.… [View More]

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[Twisted-Python] Twisted.Web and Perl CGIs
by pobrien＠orbtech.com May 21, 2003

May 21, 2003

I'm having trouble getting a Twisted.Web configured properly to work with some Perl CGI scripts. The Perl scripts are part of SQL-Ledger, and their instructions are for Apache, but I'm hoping to using Twisted instead of Apache. To begin, they suggest the following for http.conf, and I'm not sure how to go about creating the equivalent environment with Twisted: ---- create a file sql-ledger-httpd.conf in the same location where your httpd.conf is and copy the next section into the file … [View More]

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Re: [Twisted-Python] deleting server with coil
by W.J. May 21, 2003

May 21, 2003

> it seems when you start a server using the coilwebinterface, > it starts using listentcp in the same app that is already running.. > this makes that bindPorts is not called, > so when you unlisten the userdict doesnt contain the needed port... I know - A while ago I posted a patch on this list that fixes that problem in twisted.internet.app, among others. http://www.twistedmatrix.com/pipermail/twisted-python/2003-May/003945.html But I never even got a reply to it. > (btw … [View More]

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[Twisted-Python] Woven and non-breaking spaces
by Eric Holm May 21, 2003

May 21, 2003

Is there any way to dynamically insert a non-breaking space on a Woven page? It looks to me like microdom blindly replaces "&" with "&amp", and I couldn't find a way to escape the "&" in " ", but I could (easily) have missed it. Here's an example of what I'm trying to do: from twisted.web.woven import page theModel = { "someData": "Before     After" } theHtml = '<html><span model="someData" view="Text">placeholder</span>&… [View More]

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[Twisted-Python] Re: Need advice on changing blocking calls to be Twisted-aware...
by Stuart Hungerford May 21, 2003

May 21, 2003

I wrote: | Can someone point me to some example code where a | blocking-system-call-and-it's-results-needed-here pattern | is expressed in the spawnProcess/Deferred/callback world | of Twisted? | Very helpful replies: | | Use twisted.internet.utils.getProcessOutput, which returns a Deferred. | Your code should something like: Many thanks Andrew and Moshe for the advice here, much appreciated. Flushed with success I started to think about .render()'ing web pages with not just … [View More]

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