[vtk-developers] import vtkmy* in Python

[Mathieu Sornay]

Hi Eric,

Thank you very much for your response, I had not managed to solve my problem.

Following your instructions I was able to import my classes into Python, yeah !
However, I can't make it work using $PYTHONPATH (my successful import
was with vtkMy-build/bin/ as the current working directory...)
I simply did an out-of-source build and :
# export PYTHONPATH=$PYTHONPATH:~/vtkMy-build/bin
An import from python gives a "No modules named
libvtkmyCommonPython..." (The .so is there).

I'm using Debian, Python 2.6 and VTK 5.8. Any idea ?

On 6/19/12, Eric E. Monson <emonson at cs.duke.edu> wrote:
> Hey Mathieu,
>
> You may have already found a solution, but I though I'd try to help,
> anyway.
>
> (First, a note: it often works best to do an "out of source" build with
> CMake projects like this, where you create a separate "build" directory in
> the vtkMy directory and then run "ccmake .." This way you can easily do
> other builds with different options turned on, the libraries don't end up
> mixed with the source code, and it's often easier to deal with version
> control systems this way.)
>
> I think the minimal thing you could do is to also add $HOME/vtkMy/bin to
> your $PYTHONPATH, and then you should be able to do
>
> from libvtkmyCommonPython import *
>
> to get your wrapped classes into python.
>
> For my work I've duplicated part of the system from VTK/Wrapping/Python so I
> can either install my new wrapped VTK classes in the typical Python install
> location with setuptools, or I can just set the PYTHONPATH env variable to
> my build directory (what I typically do) and get these into Python with a
> simple
>
> import vtkMy
>
> call. If you want more details on that setup you can take a look at my
> repository on github:
>
> https://github.com/emonson/vtkVTG
>
> Note that my setup doesn't all work with the current "modular" VTK
> development version, but it works fine with VTK 5.10. I'll get it updated to
> the dev version once the SIP VTK wrapping has been fixed.
>
> Talk to you later,
> -Eric
>
> · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
> Eric E Monson
> Duke Visualization Technology Group
>
>
> On Jun 11, 2012, at 9:09 AM, Mathieu Sornay wrote:
>
>> Hello,
>>
>> I have added some classes to VTK using the vtkMy mecanism (thanks for
>> providing it btw).
>>
>> First, I'm not sure I have fully understood the
>> compilation/installation process. Here's what I do (VTK-5.8 on Debian)
>> :
>> - I copy the VTK/Example/Build/vtkMy directory in my $HOME.
>> - I add my .h and .cxx in the Common subdir, and add them in
>> Common/CMakeList.txt .
>> - I run "ccmake .", "make" so libvtkmyCommon.so
>> libvtkmyCommonPython.so and libvtkmyCommonPythonD.so are created in
>> the bin/ sub directory.
>> - I add $HOME/vtkMy/bin/ to $PATH and $LD_LIBRARY_PATH.
>>
>>> From there, I'm able to compile C++ code if I use the following lines
>> in my CMakeList.txt (but I suppose I'm doing it wrong...)
>> - include_directories(~/vtkMy/Common/)
>> - link_directories(~/vtkMy/bin/)
>>
>> I'm not, however, able to import anything into Python.
>>
>> I'm sure I'm missing something really obvious here, any help would be
>> greatly appreciated.
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>