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[13:26] <darq> Hi. How do I get a 2D Java array in Jython from [[1,2,3],[4,5,6]]?
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[14:58] <tlecomte> Hi all ! I am trying to use jython inside a java application, together with execnet to connect to a cpython interpreter. I am having problems with permgenspace errors in the jython script as soon as I use execnet after having used some java classes. Do you know where they can come from and how to solve this problem ?
[14:59] <tlecomte> Thanks in advance...
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[15:20] <tlecomte> Hi all ! I am trying to use jython inside a java application, together with execnet to connect to a cpython interpreter. I am having problems with permgenspace errors in the jython script as soon as I use execnet after having used some java classes. Do you know where they can come from and how to solve this problem ?
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[15:27] <agronholm> tlecomte: not sure if execnet leaks permgen memory but have you tried increasing the size of the permgen memory area?
[15:27] <agronholm> you could also try rpyc as an alternative
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[16:07] <tlecomte> @agronholm: thanks, I'll try increasing the permgen memory area and I'll look at rpyc
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[16:22] <agronholm> is your project gpl licensed?
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[18:58] <sebastian_> Hi. I'm entirely new to Jython and try to understand what exactly I can't do with it. As I understand it, that'd be calling native code outside of what would normally be in the Python interpreter? So, for example, I couldn't use the OpenCV Python bindings?
[19:03] <Arfrever> It depends on how these bindings are implemented.
[19:05] <sebastian_> I haven't been able to figure that out... It doesn't look like SWIG; it could be something homegrown. How would bindings have to be implemented to work with Jython?
[19:06] <Arfrever> ctypes
[19:06] <Arfrever> (But ctypes implementation in Jython is incomplete.)
[19:08] <Arfrever> If source code of these bindings is in C/C++, then they currently cannot be used in Jython.
[19:24] <sebastian_> Meh, they look very C++ to me :(
[19:24] <sebastian_> Thanks though. Looks like I've got to read up on ctypes.
[19:30] <Arfrever> What do you want to do anyway?
[19:36] <sebastian_> Setting up a Hadoop/HBase cluster and play "Person of Interest"; that is, feeding it prerecorded and live video/audio, and throw as many algorithms at it as I know.
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[19:37] <sebastian_> i.e. I'd like to implement a realtime version of Phototourism, that is, reconstructing 3D sceneries from images.
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[20:24] <jimbaker> sebastian_, if you want to use c/c++, you can start with jna, seems to work well w/ jython
[20:24] <jimbaker> otherwise drop down into jni
[20:24] <jimbaker> a good example project that does this intensely is sikuli. even does computer vision stuff
[20:33] <lopex> there's also jffi
[20:40] <sebastian_> Okay, so there are at least three Java ways to call C stuff which can be used from Jython, but importing a .py which calls C functions is still out, correct? So basically, most Python wrappers that have already been written are out...?
[20:45] <sebastian_> Actually, with OpenCV that might be a problem, as there'd be quite a lot of data that'd be passed up and down through the interface. Then again I'm not sure if that's not the case with the current wrapper, too...
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[23:13] <pjenvey> we have a new FFI for Python, called cffi (it's based off LuaJIT's ffi), i get the impression that adding jython support would be easier to do than ctypes
[23:13] <pjenvey> it'd be neat to have it work via jffi
[23:39] <sebastian_> Thank you, everybody, and good night.
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