Re: [mitk-users] [Extern] - Issue Enabling Python3 Support in MITK 2024.12

[Mujassim J. <muj...@gm...>]

Hi Stefan,

Thanks a lot for the clarification, that really helps. I’ll wait for
the new Python backend update, sounds exciting!

Best,
Mujassim


On Tue, 8 Apr 2025 at 11:44, Dinkelacker, Stefan
<s.d...@dk...> wrote:
>
> Hi again,
>
> since Python3 also affects the configuration/builds of a few third-party dependencies of MITK, you should configure and generate the MITK-superbuild with MITK_USE_Python3 instead of just the MITK-build. This will build the missing CTK libraries for example but also even more important changes and additions in third-party libraries like SWIG. That being said, the state of Python support in our develop and master branch is highly experimental and old. In fact, we are rewriting our whole Python backend right now and basically everything will change completely. I would advise to wait a few weeks in that regard if you can do so.
>
> Best,
> Stefan
> ________________________________________
> Von: Mujassim Jamal <muj...@gm...>
> Gesendet: Samstag, 5. April 2025 07:09
> An: mit...@li...
> Betreff: [Extern] - [mitk-users] Issue Enabling Python3 Support in MITK 2024.12
>
> Hello,
>
> I have successfully built MITK 2024.12 without Python3. Now, I have decided to reconfigure it to include Python3 support. I followed the official documentation, which instructs setting the variable 'MITK_USE_Python3' in CMake-GUI. I enabled this option and reconfigured the project. It appears that CMake successfully detected Python along with the required modules. Here is the relevant log message from CMake-GUI during reconfiguration:
> '''
> Found Python3: C:/Users/mj/AppData/Local/Programs/Python/Python313/python.exe (found suitable version "3.13.1", minimum required is "3.8") found components: Interpreter Development NumPy Development.Module Development.Embed
> '''
>
> After that, I generated the project and opened it in Visual Studio, but I encountered the following error:
> '''
> 29>CMake Error at CMake/mitkFunctionCreatePlugin.cmake:80 (message):
> 29>  org_mitk_gui_qt_python is missing requirements and won't be built.
> 29>  Missing: MitkQtPython
> 29>Call Stack (most recent call first):
> 29>  Plugins/org.mitk.gui.qt.python/CMakeLists.txt:5 (mitk_create_plugin)
> 29>
> '''
>
> In the 'FEATURE SUMMARY FOR MITK' section of the build log, it shows that 'MitkPython' is enabled, but 'MitkQtPython' is missing.
>
> After debugging, I discovered that even though 'MITK_USE_Python3' is enabled, the variables 'CTKScriptingPythonCore_INCLUDE_DIRS' and 'CTKScriptingPythonWidgets_INCLUDE_DIRS' in Modules/QtPython/CMakeLists.txt appear to be missing. To verify this, I added a print statement inside the if condition that checks for these variables, but it was never logged during the build process.
>
> I believe this is likely the reason why 'MitkQtPython' is not being built and is missing.
>
> I would greatly appreciate any help on this matter.
>
> Best,
> Mujassim
>
>