Mailman 3 November 2001 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz Aug. 5, 2021

Aug. 5, 2021

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. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |… [View More]

4 5

[Twisted-Python] PB for Java status report
by Itamar Shtull-Trauring Jan. 6, 2002

Jan. 6, 2002

It's now possible to create Referenceables in Java - meanwhile simple remote_xxx style ones only, no support for Perspectives or Viewables yet. In other words, you can now create PB services in Java as well - I think it's pluggable enough that you could integrate this with any Java server architecture that uses streams (which is probably all of them :).

3 4

[Twisted-Python] FAQ-o-matic
by Michael Dartt Dec. 3, 2001

Dec. 3, 2001

I'd like to suggest the addition of a FAQ-o-matic (http://faqomatic.sourceforge.net/fom-serve/cache/427.html)to the Twisted site. I think it would make it much easier to get and to post info, as you wouldn't have to wait for someone to write The Definitive Documentation(tm) for a given subject. From what I've seen/experienced, the "document-as-you-go" approach works much better for open-source projects. I'm willing to do the work of getting the F-o-m set up. (Perhaps I should stick … [View More]

5 5

[Twisted-Python] Twisted 0.12.2
by Chris Armstrong Nov. 30, 2001

Nov. 30, 2001

Hey all. I released Twisted 0.12.2 today, it was mainly a bunch of bug fixes with a few features. Here's the changes: What's new in 0.12.2? Removed some broken and/or experimental code. Added poll() based event loop implementation. New minimal documentation for WebWidgets and Manhole in the doc/ directory. Made some changes to the listen API -- changed from listenOn to listenTCP, listenUDP, and listenSSL. Some UI changes for InstanceMessenger. Some caching support for … [View More]

2 1

[Twisted-Python] Re: [Twisted-commits] CVS: Twisted/twisted/internet poll.py,NONE,1.1
by Itamar Shtull-Trauring Nov. 29, 2001

Nov. 29, 2001

Itamar Shtull-Trauring wrote: > Update of /cvs/Twisted/twisted/internet > In directory zaibach:/tmp/cvs-serv28575 > > Added Files: > poll.py > Log Message: > preliminary poll()-based event loop > What I learned - the addReader/addWriter/etc. API is far too select() oriented. Every other alternative (poll, kqeue, windows event thing) works by registering and unregistering objects - correct me if I'm wrong. So instead of having to emulate a select()-like API, we … [View More]

2 5

[Twisted-Python] Intro and "Slash- or Squishdot-style stuff?"
by Michael Dartt Nov. 28, 2001

Nov. 28, 2001

Hello, everyone. <introduction>I did some work with God--er, Glyph--on Twisted Reality back in the days when it was in Java. I've done a decent chunk of coding, including using Python (which is still my favorite language), but I admit to being almost a complete newbie when it comes to network programming. Other than that...I live in Madison, WI and work at EDS on the WI Medicaid account.</introduction> I'm considering using Twisted for a news/portal site in a similar style … [View More]

2 3

[Twisted-Python] cursors
by Kevin Turner Nov. 24, 2001

Nov. 24, 2001

Someone, either Glyph or Tommi, mentioned that they wanted cursors a while back. "What's that," I asked; then thought "hm. I could do that." But I didn't. Only, now I did. I think. -- The moon is waxing gibbous, 58.9% illuminated, 8.2 days old. # -*- Python -*- # Kevin Turner <acapnotic(a)foobox.net>, November 23, 2001 # This code is in the Public Domain. from UserList import UserList import types class CursoredList(UserList): _cursorlist = None def __init__(self, seq=… [View More]None): UserList.__init__(self, seq) def setCursor(self): if self._cursorlist is None: self._cursorlist = [] self._cursorlist[:] = range(len(self.data)) self._cursorLen = len(self.data) def cursor(self, key): if self._cursorlist is None: return self.__getitem__(key) if isinstance(key, types.SliceType): start, stop, step = key.start, key.stop, key.step if not step: step = 1 if start is None: start = 0 elif start < 0: start = self._cursorLen + start if (stop is None) or (stop > self._cursorLen): stop = self._cursorLen elif stop < 0: start = self._cursorLen + stop result = [] for i in xrange(start, stop, step): result.append(self.cursor(i)) return result else: key = int(key) if key < 0: key = self._cursorLen + key assert(0 <= key < self._cursorLen) new_key = self._cursorlist.index(key) return self.__getitem__(new_key) def __setitem__(self, key, value): if (self._cursorlist is not None) \ and isinstance(key, types.SliceType): self._cursorlist[key.start:key.stop] = [None] * len(value) if isinstance(key, types.SliceType): self.data[key.start:key.stop] = value else: self.data[key] = value def __getitem__(self, key): if isinstance(key, types.SliceType): return self.data[key.start:key.stop] else: return self.data[key] def __delitem__(self, key): if not isinstance(key, types.SliceType): key = slice(key, key+1) self.__setitem__(key, []) def __getslice__(self, start, stop): return self.__getitem__(slice(start, stop)) def __setslice__(self, start, stop, value): return self.__setitem__(slice(start, stop), value) def __delslice__(self, start, stop): return self.__delitem__(slice(start, stop)) def __iadd__(self, other): self.extend(other) return self def __imul__(self, multiplier): if self._cursorlist is not None: self._cursorlist.extend(([None] * len(self.data)) * (multiplier-1)) self.data[:] = self.data * multiplier def append(self, item): self[len(self):len(self)] = [item] def insert(self, i, item): self[i:i] = [item] def pop(self, i=-1): value = self[i] del self[i] return value def remove(self, item): i = self.index(item) del self[i] def reverse(self): self.data.reverse() if self._cursorlist is not None: self._cursorlist.reverse() def sort(self, cmpfunc=None): if self._cursorlist is not None: zipped = map(None, self.data, self._cursorlist) if cmpfunc: # The supplied cmpfunc won't be expecting the zipped list. cmpfunc_ = lambda x, y, c=cmpfunc: c(x[0], y[0]) zipped.sort(cmpfunc_) else: zipped.sort() for i in range(len(zipped)): self.data[i], self._cursorlist[i] = zipped[i] else: self.data.sort() def extend(self, other): self[len(self):len(self)] = other [View Less]

3 2

[Twisted-Python] WebWidgets and Deferreds.
by Chris Armstrong Nov. 24, 2001

Nov. 24, 2001

Ok, riddle me this, glyph (or anyone else who knows about this). Why do we need Deferreds to be a special-case in WebWidgets? Why can't _all_ widgets be displayed only right when they're needed? RenderSession could just take a Widget, and display() it (and the widgets that display() returns) in order.. Is there some sort of performance issue here, maybe? Maybe I'll try implementing this, and send a patch to be looked at. -- <TomG> I'm in the wrong channel. -- … [View More]

1 2

[Twisted-Python] Re: [Twisted-commits] CVS: Twisted/twisted/protocols irc.py,1.24,1.25
by Glyph Lefkowitz Nov. 23, 2001

Nov. 23, 2001

On Wed, Nov 21, 2001 at 11:48:54PM -0600, Kevin Turner wrote: > protocols/irc.py: An exception in the server isn't a reason to drop the > client, right? IMHO, it is. If the protocol isn't specifically designed to deal with exceptions (For example, dynamic web content or PB protocol exceptions) then it's undefined behavior and the connection should be dropped. Bot behavior should be implemented in a layer above the IRC protocol, if there is a place for a catch-all exception handler. I … [View More]

3 3

[Twisted-Python] Sites, protocols etc.
by Magnus Heino Nov. 21, 2001

Nov. 21, 2001

Hi. I've got a basic app using widgets up'n'running. Still, it would be nice with an example of how it is meant to be used. Surely someone must have anything? Doesn't even have to work... I just want to know that I'm doing things The Right Way. Next question: Can I serve both xmlrpc and http from the same application/site? I guess I can, but I havent figured out how... Thanks, /Magnus

3 2

[Twisted-Python] More on XMLRPC
by Magnus Heino Nov. 21, 2001

Nov. 21, 2001

Hi. I just want to make sure that my conclusions are right: If I create an application using widgets, resource.Resource.getChild is used to traverse the URL to find the callable object. This traverse will always take place if resource.Resource.isLeaf is set to 0. The server.Request.process will then assume that we want to return html, and call render() on the object. After processing all childs, the page will be returned to the browser. The xmlrpc-implementation in xmlrpc.XMLRPC sets … [View More]

2 1

[Twisted-Python] ONJava.com: Atomic File Transactions, Part 1 [Nov. 07, 2001]
by Itamar Shtull-Trauring Nov. 19, 2001

Nov. 19, 2001

This would be very useful to have in Twisted (e.g. we could have a transactional dirdbm): <http://www.onjava.com/pub/a/onjava/2001/11/07/atomic.html>

2 1

[Twisted-Python] Docs/Examples
by Magnus Heino Nov. 19, 2001

Nov. 19, 2001

Hi. Are there any documentation/examples/tutorials/applications that use twisted available? I can't find anything useful, except for browsing the source-code... is that the way to go, or have I missed something? /Magnus

3 4

[Twisted-Python] Docs/Examples
by Magnus Heino Nov. 19, 2001

Nov. 19, 2001

Hi. Are there any documentation/examples/tutorials/applications that use twisted available? I can't find anything useful, except for browsing the source-code... is that the way to go, or have I missed something? /Magnus

1 0

[Twisted-Python] Possible patch to twisted.python.hook
by Itamar Shtull-Trauring Nov. 18, 2001

Nov. 18, 2001

The following patch makes post hook get the result of the hooked function. THis lets you do cool stuff like pre/post-conditions (like synchronization, they can be optional), but it is most likely rather slower than the current hook, which means synchronized classes will be slower. I have a working implementation of pre/post conditions based on this, if anyone's interested. *** hook.py Sun Nov 18 20:02:59 2001 --- hook.py-new Sun Nov 11 11:31:17 2001 *************** *** 48,55 **** --- 48,… [View More]

1 0

[Twisted-Python] Win32 select in internet.main
by Itamar Shtull-Trauring Nov. 18, 2001

Nov. 18, 2001

HappyFool pointed out on IRC that the fix for empty read and write lists in select.select on windows is only done for iterate(), not run(). Perhaps the following patch should be used? Index: twisted/internet/main.py =================================================================== RCS file: /cvs/Twisted/twisted/internet/main.py,v retrieving revision 1.42 diff -c -r1.42 main.py *** twisted/internet/main.py 2001/10/30 23:55:39 1.42 --- twisted/internet/main.py 2001/11/18 11:54:58 ************… [View More]

1 0

[Twisted-Python] Process Producer, Request Consumer
by Kevin Turner Nov. 18, 2001

Nov. 18, 2001

So somebody asked on the channel today, "how do I get the output of a system command displayed on my .epy web page?" Basically, the  type of thing, if I remember my SSI. Now, given the pieces that are in Twisted, it seems like this should be at most two lines long: 1) create Process 2) designate the web Request as a consumer of the Process. except that I don't know how to do #2 quite so succinctly. Can anyone speak on this subject? - Kevin -- The moon is … [View More]

3 4

[Twisted-Python] Re: [Twisted-commits] CVS: Twisted/twisted/web server.py,1.22,1.23
by Itamar Shtull-Trauring Nov. 15, 2001

Nov. 15, 2001

Itamar Shtull-Trauring wrote: > + > + # if this is a "HEAD" request, we shouldn't return any data > + if self.method == "HEAD": > + self.write = lambda data: None > + I just thought of this - is this gonna break spreadable web servers?

2 1

[Twisted-Python] We are Unable to Reach your Web Page
by adam.brett＠mail.internetseer.com Nov. 14, 2001

Nov. 14, 2001

There appears to be a problem in reaching the following Web page from Philadelphia, Pennsylvania: http://twistedmatrix.com/pipermail/twisted-python/2001-August/000160.html Error: Time Out This error is most commonly due to an Internet connection problem and does not necessarily indicate that your server is down. As recommended by the robot Guidelines, this email is to explain our research activity and to alert you about the connectivity error we encountered. InternetSeer, the … [View More]

3 2

[Twisted-Python] non-blocking and non-blocking.
by Kevin Turner Nov. 14, 2001

Nov. 14, 2001

So, if you run something like the following through manhole: def spam(n=300): for i in xrange(n): print "iiIiiIiI", i spam() the whole mess comes back when the command has finished completion, and receiving that much data seems to take the protocol-decoder a while to decode. Long enough that it can cause a hiccup, or outright stall, in the GUI. So it might be nice to do that processing in incremental bit so it shares time better. In twisted.python terms, it'd be in a Looping … [View More]

2 1

[Twisted-Python] Referenceable interfaces in Java
by Itamar Shtull-Trauring Nov. 12, 2001

Nov. 12, 2001

Any suggestions on how to deal with keywords args in Java PB referenceables? If I just ignore them I can make methods in Referenceables be a lot more normal looking: public Object remote_foo(Integer x) instead of: public Object remote_foo(Object[] args, Map kwargs) And allow method overloading too. I could of course implement both policies in different classes, in which case I'd be happy for suggestions on a name for such classes.

1 0

[Twisted-Python] im bug... (oops)
by Chris Armstrong Nov. 12, 2001

Nov. 12, 2001

Sorry. I didn't have the latest CVS. That last bug is obsolete. :( But heh, I have a couple other bugs to report now :) (There was a syntaxerror in toc.py, but I've already fixed that myself.) First off, loading of the ~/.imsaved pickles doesn't work. I get an EofError every time on the cPickle.load(file). second, I'm getting this: Traceback (most recent call last): File "/home/punck/cvs/Twisted/bin/im", line 54, in ? tkim.main() File "/home/punck/cvs/Twisted/twisted/words/ui/tkim.py",… [View More]

1 0

[Twisted-Python] im bug
by Chris Armstrong Nov. 12, 2001

Nov. 12, 2001

Traceback (most recent call last): File "/usr/lib/python2.1/lib-tk/Tkinter.py", line 1285, in __call__ return apply(self.func, args) File "/home/punck/cvs/Twisted/twisted/words/ui/tkim.py", line 639, in logOnOff self.logonAccount(account) File "/home/punck/cvs/Twisted/twisted/words/ui/tkim.py", line 645, in logonAccount missing=im3.logonAccount(self.im,account) File "/home/punck/cvs/Twisted/twisted/words/ui/im3.py", line 508, in logonAccount for foo,key,bar in gateways.… [View More]

1 0

[Twisted-Python] twisted.words.ui.im3.saveState
by Kevin Turner Nov. 11, 2001

Nov. 11, 2001

Say, what's up with the proliferationg of numbered imX.py files? Anyway, what I meant to say was: im3.py:492: No global (gateway) found -- The moon is waning crescent, 16.9% illuminated, 25.5 days old.

1 0

[Twisted-Python] ObjectBrowser references
by Kevin Turner Nov. 11, 2001

Nov. 11, 2001

So, there's been some confusion expressed (by certain sleep-deprived individuals) about what it is that the class twisted.python.explorer.ObjectBrowser is for. Given that this is the first-pass implementation and a number of questionable decisions were made in the implementation, that's to be expected. One train of questions goes like this: Q) Why is ObjectBrowser a class at all, and not just a collection of introspection functions? A) You're right, the browse_* methods make no use of … [View More]an ObjectBrowser instance's state, and could well be static functions. The only reason to inXXX (what's the verb "to create an instance of a class"?) ObjectBrowser is so it can hold on to a consistant namespace. (See also the comment preceding the browse_ definitons for another reason why these methods should be gathered in a container.) Q) What's it doing holding namespaces? A) It eval()uates the identifiers (identifiying expressions, really) given to it in its namespace. Q) Ugh. What's ObjectBrowser got to use eval() for? Why doesn't it just take an object? And thus we arrive at the crux of the issue. Here's my thinking: Requirement: When an object is "browsed", the result will contain references to other objects; it's attributes, sequence elements, etc. It must be easy for the user to take one of those references and browse that object. Requirement: ObjectBrowser be usable via remote interface, i.e. PB or web. Consequence: When returning references to other objects in its results, ObjectBrowser cannot return Python references to the objects themselves. It must return some more "portable" reference which can freely be passed both ways through the boundry of this Python process. This is not the first time man has encountered such a problem; it's the same problem Pickle faces when referencing objects "outside the pickled data stream". It's central to the whole concept of Perspective Broker remote references. It's why Glyph keeps saying we need some sort of URI to identify objects with. But not every object is pb.Referenceable, and we don't have a distributed object URI scheme yet. So the only way I can think of to refer to a particular object is the way a programmer refers to the object when speaking to the interpter -- by its identifier. that string which, when evaluated by the interpreter, is a reference to the object. So that's what ObjectBrowser returns. ObjectLinks represeting objects with particular identifiers. Now we go back to the first requirement, "It must be easy for the user to take one of those references and browse that object." Or, as a unit test: lookAtMe = SomeThing() # Look at this object. objectLink1 = browser.browseIdentifier('lookAtMe') # Now look at some object related to this one. # Simplest case: I am related to me. myIdentifier = objectLink1.identifier objectLink2 = browser.browseIdentifier(myIdentifier) # Did I get the object with the desired relation? # (Simplest case: Was I really me?) failUnlessEqual(objectLink1.id, objectLink2.id) Now, to obtain objectLink1, you could argue that we could have used browser.browseObject(object=lookAtMe, identifier='lookAtMe'), and you're right. But to obtain objectLink2, when we only have the contents of objectLink1 to work from, we only have the identifier to pass back. So that's why I think ObjectBrowser needs to accept identifiers, and that's why I guess ObjectBrowser has to use eval(), ... Questions, comments, reservations? Suggestions? -- Kevin Turner <acapnotic(a)twistedmatrix.com> | OpenPGP encryption welcome here The moon is waning crescent, 18.2% illuminated, 25.4 days old. [View Less]

2 2