Mailman 3 May 2006 - Twisted

Re: [Twisted-Python] Synchronous Code Fishbowl
by Ed Suominen 02 Jun '06

02 Jun '06

Glyph wrote: > syncbridge looks like an interesting module. I've often wanted to do > something similar, to have a "one right way" for integrating with > non-async-clean legacy code which also doesn't necessarily support > threaded concurrency either. > > However, I notice that nothing sets up the 'shutdown' method to be > called on reactor shutdown automatically; this is a very tricky area, > since mismanaged thread-pool shutdown can lock a process up hard as > it's exiting. > > Also, have you considered just using a twisted.python.threadpool of > maximum size 1, rather than callInThread? The main reason I didn't > document that as the aforementioned "one right way" was because of > the associated shutdown issues. The major advantage of callInThread > is that the reactor's own threadpool is definitely initialized and > shut down at predictable points. Well of course, Glyph's "interesting module" comment was just enough of a table scrap to get me running, tail wagging furiously. The result (unit testing in progress) is a full-fledged SynchronousTasks object that runs a priority queue of synchronous tasks with niceness scheduling. See * http://foss.eepatents.com/sAsync/browser/trunk/sasync/syncbridge.py * http://foss.eepatents.com/sAsync/browser/trunk/test/syncbridge.py Once fully tested, would SynchronousTasks be considered as an addition to twisted.internet.threads? Best regards, Ed

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[Twisted-Python] twisted WORDS and ICQ connect throug http proxy
by Igor Prischepoff 31 May '06

31 May '06

Hello, I'm trying to connect to icq. ..\Lib\site-packages\TwistedDocs\examples\oscardemo.py gives me following messages: ... Unhandled error in Deferred: Traceback (most recent call last): Failure: twisted.internet.error.TCPTimedOutError: TCP connection timed out: 10060: Unknown error. ... when looking in my icq pro 2003 setup I've noticed that we use http proxy here in office. so how can I modify oscardemo.py just to connect to icq? I've got environment variable http_proxy=http://digits.digits.digits:digits_port_number Other network based utilities (perl for example) recognize this variable and use this proxy. Can oscardemo.py use proxy as well? --- Igor igor(a)tyumbit.ru

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[Twisted-Python] ping with twisted
by Carl Lambert 31 May '06

31 May '06

Hi, Im writing a simple network monitoring system for my internal work network. ive got most of it sussed.. snmp, port probs etc.. but im strugling when it comes to pinging the boxes.. is there a simple way to do this? if not what would be the best way of going about it? Thanks Carl

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[Twisted-Python] Upgrade Questions
by Nealie 31 May '06

31 May '06

I'm in the process of upgrading the FreeBSD port of TwistedCore and I have a couple of questions: - The source distribution used to be hosted both on the twistedmatrix.com and tmrc.mit.edu sites. It only seems to be on the latter now. Is this true or is there another site I can add to the list of master sites since it's always nice to allow the port system to try other sites if one is down? - There seems to be a problem while performing the install_lib phase of the installation during byte compiling. I get the following: byte-compiling /var/tmp/port-name/lib/python2.4/site-packages/twisted/test/stdio_test_halfclose.py to stdio_test_halfclose.pyc File "/var/tmp/port-name/lib/python2.4/site-packages/twisted/test/stdio_test_halfclose.py", line 20 ??? ^ SyntaxError: invalid syntax There actually appears to be a "???" on this line. Regards, Neal Nelson.

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[Twisted-Python] twisted and PyQt4
by scalet＠yebu.de 30 May '06

30 May '06

Hi Gabe, thank you very much for the modified qtreactor and jp for the answer Karl

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[Twisted-Python] Re: [Twisted-commits] r16971 - Fix name conflict between conch and legacy manhole plugins.
by Jean-Paul Calderone 30 May '06

30 May '06

On Mon, 29 May 2006 21:31:09 -0600, Glyph Lefkowitz <glyph(a)wolfwood.twistedmatrix.com> wrote: >Author: glyph >Date: Mon May 29 21:31:08 2006 >New Revision: 16971 > >Modified: > trunk/twisted/plugins/twisted_manhole.py >Log: >Fix name conflict between conch and legacy manhole plugins. > >'mktap manhole' would non-deterministically give you a different plugin >sometimes, due to the fact that the old manhole tap plugin had the same name. > >This changes the old manhole plugin's name to "manhole-old", since the title >already said (old). This fixes the name conflict. > Author! Reviewer! Ticket number! Jean-Paul

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[Twisted-Python] Re: [Twisted-commits] r16970 - removed a bunch of deprecations but then realized I didn't want to spend the last 30 minutes of the day working on this
by Jean-Paul Calderone 30 May '06

30 May '06

On Mon, 29 May 2006 21:24:29 -0600, Glyph Lefkowitz <glyph(a)wolfwood.twistedmatrix.com> wrote: >Author: glyph >Date: Mon May 29 21:24:28 2006 >New Revision: 16970 > >Modified: > [snip] > branches/killtpc-1636/twisted/spread/banana.py > branches/killtpc-1636/twisted/test/test_banana.py > [snip] >Log: >removed a bunch of deprecations but then realized I didn't want to spend the last 30 minutes of the day working on this > > [snip] >Modified: branches/killtpc-1636/twisted/spread/banana.py >============================================================================== >--- branches/killtpc-1636/twisted/spread/banana.py (original) >+++ branches/killtpc-1636/twisted/spread/banana.py Mon May 29 21:24:28 2006 >@@ -255,20 +255,21 @@ > write(LIST) > for elem in obj: > self._encode(elem, write) >- elif isinstance(obj, types.IntType): >- if obj >= 0: >- int2b128(obj, write) >- write(INT) >+ elif isinstance(obj, (types.IntType, types.LongType)): >+ aobj = abs(obj) >+ if aobj < (2**32): # this is lame, but it's what the protocol >+ # spec says. >+ if obj >= 0: >+ typebyte = INT >+ else: >+ typebyte = NEG > else: >- int2b128(-obj, write) >- write(NEG) >- elif isinstance(obj, types.LongType): >- if obj >= 0l: >- int2b128(obj, write) >- write(LONGINT) >- else: >- int2b128(-obj, write) >- write(LONGNEG) >+ if obj >= 0: >+ typebyte = LONGINT >+ else: >+ typebyte = LONGNEG >+ int2b128(aobj, write) >+ write(typebyte) > elif isinstance(obj, types.FloatType): > write(FLOAT) > write(struct.pack("!d", obj)) > > [snip] >Modified: branches/killtpc-1636/twisted/test/test_banana.py >============================================================================== >--- branches/killtpc-1636/twisted/test/test_banana.py (original) >+++ branches/killtpc-1636/twisted/test/test_banana.py Mon May 29 21:24:28 2006 >@@ -134,7 +134,21 @@ > self.enc.dataReceived(self.io.getvalue()) > assert self.result == -2147483648, "should be -2147483648, got %s" % self.result > >- >+ def _roundtrip(self, value): >+ self.io.seek(0) >+ self.io.truncate() >+ self.enc.sendEncoded(value) >+ self.enc.dataReceived(self.io.getvalue()) >+ return self.result >+ >+ def testSizedIntegerTypes(self): >+ # use int to decode int, long to decode long. >+ self.assertEquals(type(self._roundtrip(2l)), int) >+ # this should always come back as a 'long' even on 64-bit platforms, >+ # because it was encoded that way. Kind of a lame test, but at least >+ # it makes sure that <64bit numbers won't be encoded as INT... >+ self.assertEquals(type(self._roundtrip(2**35)), long) >+ > testCases = [MathTestCase, BananaTestCase] > > try: > These changes don't look like the others.

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[Twisted-Python] Another upgrade question: PB
by Nealie 30 May '06

30 May '06

I have another quick question about the new 2.4.0 release of TwistedCore: What happened to the pb directory and it's contents as it seems to have been removed from the distribution? Should I be worrying about this? Regards, Neal Nelson.

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[Twisted-Python] Re: Flow, generators, coroutines etc.
by Dominic Fox 30 May '06

30 May '06

This just in... http://lambda-the-ultimate.org/node/1520 "Narrative Javascript is an extension to Javascript that adds an operator to convert asynchronous operations into synchronous ones. It has a compiler that compiles the extended Javascript into normal Javascript." Dominic

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[Twisted-Python] Sydney Sprint
by Eric Mangold 29 May '06

29 May '06

I'm a little bit concerned about attendance for the June 3-4 Sydney Sprint. The wiki page only lists two people: http://twistedmatrix.com/trac/wiki/SydneySprint Unfortunately that page requires a trac login with edit permissions to change, so I'm afraid some people have been unable to add themselves to the list. Would everyone attending be kind enough to reply to this thread? Also, can anyone recommend accommodations near the UTS campus? Cheers, -Eric

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