[vtkusers] Python and VTK

[Nick Torenvliet]

I see... thanks David!

On Wed, Sep 27, 2017 at 11:52 AM, David Gobbi <david.gobbi at gmail.com> wrote:

> Hi Nick,
>
> Also check CMAKE_BUILD_TYPE.  If it is set like the following, then your
> compile was done with no optimization and the resulting VTK will be rather
> slow:
>
>   CMAKE_BUILD_TYPE:STRING=
>
> You should make sure that this is set to "Release" or "RelWithDebInfo"
> (unless you specifically want a debug build, in which case you should set
> it to "Debug").
>
>
> Building VTK with the Python wrappers requires BUILD_SHARED_LIBS=ON in the
> general case.  This is known by everyone who builds the VTK Python wrappers
> on a regular basis, but perhaps it isn't documented as well as it should be.
>
> However, cmake does not force shared libraries when VTK_WRAP_PYTHON is on
> because there are some situations where static libraries make sense with
> Python, e.g. when someone wants to build their very own Python executable
> with all the libraries built-in.
>
>  - David
>
>
> On Wed, Sep 27, 2017 at 9:03 AM, Nick Torenvliet <natorenvliet at gmail.com>
> wrote:
>
>> Hey Dan,
>>
>> It looks like it worked.
>>
>> On my second last pass, I was compiling "without shared libraries" and
>> got some error in the make output indicating something like "I don't want
>> to do that because it requires shared libraries."  I had "shared libraries"
>> as negative in the config step.
>>
>> On my last ccmake I configured for "with shared libraries" and my last
>> compile just finished with no errors.
>>
>> It looks like somewhere in the ccmake process, a dependency on "shared
>> libraries" exists,  and config passes with no errors even if "shared
>> libraries" is off - this leads to a fail at compile time.
>>
>> Seems like a hard to reproduce error, let me know if you want any of my
>> local files to document a possible bug in the compile process.
>>
>> Regards,
>>
>> Nick
>>
>> On Wed, Sep 27, 2017 at 10:36 AM, Dan Lipsa <dan.lipsa at kitware.com>
>> wrote:
>>
>>> Indeed, that's what you probably need to do. Look at the symbols not
>>> found and search on the web to see what packages they are part of.
>>>
>>> On Wed, Sep 27, 2017 at 10:04 AM, Nick Torenvliet <
>>> natorenvliet at gmail.com> wrote:
>>>
>>>> Ooops!
>>>>
>>>> Hey Dan, thanks!  It is now working fine - guess I need to bone up on
>>>> my ccmake skills.
>>>>
>>>> Another question then,
>>>>
>>>> A couple of the examples are coughing with:
>>>>
>>>> _tkinter.TclError: couldn't load file "libvtkRenderingPythonTkWidget
>>>> s-8.0.so": libvtkRenderingPythonTkWidgets-8.0.so: cannot open shared
>>>> object file: No such file or directory
>>>>
>>>> So to address this I am attempting to rebuild with GROUP_TK set on.
>>>>
>>>> Now I get the following compile error:
>>>> [ 87%] Linking CXX executable ../../../../bin/vtkInteraction
>>>> WidgetsCxxTests
>>>> [ 87%] Built target vtkInteractionWidgetsCxxTests
>>>> Makefile:138: recipe for target 'all' failed
>>>> make: *** [all] Error 2
>>>>
>>>> I'm going to hunt around and probably install twenty or so random
>>>> packages that look anything like what I find @ 138 but if anyone knows what
>>>> I need to do, please let me know.
>>>>
>>>> Thanks,
>>>>
>>>> Nick
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Wed, Sep 27, 2017 at 9:26 AM, Dan Lipsa <dan.lipsa at kitware.com>
>>>> wrote:
>>>>
>>>>> Nick,
>>>>>
>>>>> You should have VTK_PYTHON_VERSION=3 and VTK_WRAP_PYTHON=ON
>>>>> You should use vtkpython. This has all the right paths to see the VTK
>>>>> library.
>>>>>
>>>>> Take a look in your CMakeCache.txt and search for python to see your
>>>>> python related variables. If some point to python2 paths delete them and
>>>>> reconfigure and rebuild your VTK.
>>>>>
>>>>> Hope this helps,
>>>>> Dan
>>>>>
>>>>>
>>>>> On Tue, Sep 26, 2017 at 9:32 PM, Nick Torenvliet <
>>>>> natorenvliet at gmail.com> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I'm running ubuntu 16.04 with python3.
>>>>>>
>>>>>> After compiling and installing vtk8 the following occurs.
>>>>>>
>>>>>> 1- I have an issue with doxygen / docs during vtk make install
>>>>>>
>>>>>> After make install
>>>>>>
>>>>>> 1- I fire up a python 3 window and can import vtk, but cannot call
>>>>>> any of the vtk functions except for those beginning with __
>>>>>> 2- I fire up my python2 window and cannot import vtk at all
>>>>>> 3- I fire up vtkpython, which looks to be p3.5 and cannot import vtk
>>>>>> at all
>>>>>>
>>>>>> I feel like I'm missing a major step hooking the wrappers up into the
>>>>>> python environment.
>>>>>>
>>>>>> My desired functionality is to have vtk in python 3.5, optimally in a
>>>>>> venv if possible.
>>>>>>
>>>>>> Any ideas?
>>>>>>
>>>>>> Nick
>>>>>>
>>>>>
>
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