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[2:00] <jimbaker> cool, a new jython book - http://www.amazon.com/Scientific-Scripting-Information-Knowledge-Processing/dp/1849962863/
[2:01] <jimbaker> i have not heard of jHepWork until now, but apparently it is "the world's leading open-source Java software for scientists"
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[8:20] <Ademan> does jython generate jvm bytecode at runtime?
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[9:05] <agronholm> yes
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[15:00] <vitormazzi> what could make the PackageManager fail to find the classes in a jar file?
[15:01] <vitormazzi> if I add the class via sys.add_package, the class is imported successfully, otherwise it's import fails
[15:03] <vitormazzi> does anyone have a clue? I already looked at all the tickets that could be related to this, without any luck
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[16:05] <jimbaker> vitormazzi: this is a bit too open ended for me, unfortunately
[16:11] <vitormazzi> jimbaker: yeah, I agree. I just don't know where to look at to get more information
[16:12] <vitormazzi> there is nothing fancy being done. Just a virtualenv based on a plain jython install (2.5.2b)
[16:12] <jimbaker> that works well
[16:12] <jimbaker> however, i have previous experience with virtualenv not always getting the links right
[16:12] <vitormazzi> yeah.. it is working fine on 5 other machines..
[16:14] <vitormazzi> already tried using the jython outside of the virtualenv, same thing
[16:14] <vitormazzi> i'll checkout jython source to see if i get any hints
[16:15] <ropoctl> how does the speed compare between jython and java extensions that manipulate python objects
[16:15] <jimbaker> sounds like a good idea - easy enough to instrument the source if you need to go down that route (never use a debugger on jython source unless you want to spend a lot of time ;) )
[16:16] <ropoctl> im deciding how much more of the processing to code into java
[16:16] <jimbaker> java extensions will definitely work faster. so standard profiling applies here
[16:17] <jimbaker> there's no overhead in java code calling the python objects. there is some overhead calling your java code, because it goes through reflection
[16:17] <jimbaker> but in general, pretty minor
[16:18] <jimbaker> we need to pull out the expose functionality that we use for jython internals, which allows us to avoid the reflection overhead... that could be released as a pypi package however, so 2.5.2 doesn't depend on it, and you don't have to wait for 2.6
[16:19] <ropoctl> yah i guess i will need to learn how to do the profiling
[16:19] <jimbaker> standard python profile works fine... slow, compared to cProfile, but it knows about python
[16:20] <vitormazzi> jimbaker: thanks for the help
[16:20] <jimbaker> (we could implement a "cProfile", but probably the better bet is to work with an existing java profiler and teach it more about python)
[16:20] <ropoctl> cProfile does not work in jython right
[16:20] <jimbaker> correct, no cProfile
[16:20] <ropoctl> http://www.jython.org/docs/library/profile.html mentions cProfile for some reason
[16:21] <jimbaker> ropoctl: that's because we haven't really combed through that particular docset
[16:21] <ropoctl> thats just copypasta from the standard docs
[16:21] <ropoctl> ah
[16:21] <jimbaker> we basically lifted it from cpython 2.6, yes
[16:22] <jimbaker> the thought is to use mercurial to manage the patches better.... regardless, it's part of 2.5.2 final to do these corrections in the docset
[16:23] <jimbaker> see http://bugs.jython.org/issue1650 - deque is just the tip of this problem
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[16:26] <jimbaker> just thinking out loud here - it could be very useful to have a doc sprint. maybe part of a larger sprint. just choose some day in the next month and divide out the docs to be checked
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[16:28] <jimbaker> i know documentation is very popular to work on ;), but really this is something where many eyeballs could be very helpful. i remember one of the django sprints, they were using irc to dispatch jobs like this
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[18:56] <ropoctl> if im running profile on something that spawns threads, i need to kill them all off before the program completes?
[18:59] <ropoctl> ok nevermind, that was a pretty dumb question
[19:07] <ropoctl> how much overhead does Queue have?
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[21:38] <jimbaker> ropoctl: i don't think anyone has analyzed Queue - it's pure python, because java's blocking queues have slightly different semantics. but my intuition would be that it has very little to do with performance - most of that's going to be in the time consumed to rendezvous between threads
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[23:17] * enebo (~enebo@p1185-ipbf213akatuka.ibaraki.ocn.ne.jp) Quit (Quit: enebo)
[23:28] * jimbaker (~jbaker@64.134.125.48) Quit (Quit: jimbaker)
[23:32] * Ademan (~dan@adsl-75-36-248-63.dsl.pltn13.sbcglobal.net) Quit (Quit: Lost terminal)
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