That's pretty much the same scenario. One crucial thing is to call Python only 
once per time step by using list/vector arguments/parameters. Then it worked 
without significant performance loss. Calling Python within every call to 
source and only passing scalar values resulted in a performance degradation by 
a factor of 200.


Kind regards

Bernd


--
_________________________________________________________________

Bernd Flemisch
IWS, Universität Stuttgart               phone: +49 711 685 69162
Pfaffenwaldring 61              email: be...@iws.uni-stuttgart.de
D-70569 Stuttgart           url: 
www.iws.uni-stuttgart.de/en/lh2/<http://www.iws.uni-stuttgart.de/en/lh2/>
_________________________________________________________________
________________________________
Von: DuMux <dumux-boun...@listserv.uni-stuttgart.de> im Auftrag von 
leopold.stad...@baw.de <leopold.stad...@baw.de>
Gesendet: Donnerstag, 9. September 2021 13:35:30
An: DuMux User Mailing List
Betreff: Re: [DuMux] Using Embedded Python in DuMux

Hi Bernd,

thank you for this nice example. I've used embedded Python 10 years ago. My 
code was much less elegant and so I thought that one has to do this nowadays 
with Pybind11. However, looking into your example it looks like the Python/C 
API does also the job. For me it helps a lot to see how the Python interpreter 
is initialized and finalized in problem.hh and how data is converted.

Actually I need a simple Python function for the source term so there are just 
a few parameters which have to be passed between C++ and Python.

Best regards,

Leo

Flemisch, Bernd <bernd.flemi...@iws.uni-stuttgart.de> hat am 09.09.2021 12:27 
geschrieben:



Hi Leo,


we're doing this here:

https://git.iws.uni-stuttgart.de/dumux-appl/dumux-turing/-/tree/master/test/stochastic

I needed the python3-dev package and had to run the executable with

PYTHONPATH=. ./test_stochastic



Kind regards

Bernd
<https://git.iws.uni-stuttgart.de/dumux-appl/dumux-turing/-/tree/master/test/stochastic>


--
_________________________________________________________________

Bernd Flemisch
IWS, Universität Stuttgart               phone: +49 711 685 69162
Pfaffenwaldring 61              email: be...@iws.uni-stuttgart.de
D-70569 Stuttgart           url: 
www.iws.uni-stuttgart.de/en/lh2/<http://www.iws.uni-stuttgart.de/en/lh2/>
_________________________________________________________________
________________________________
Von: DuMux <dumux-boun...@listserv.uni-stuttgart.de> im Auftrag von 
leopold.stad...@baw.de <leopold.stad...@baw.de>
Gesendet: Donnerstag, 9. September 2021 11:58:04
An: dumux@listserv.uni-stuttgart.de
Betreff: [DuMux] Using Embedded Python in DuMux

Dear DuMux developers and users,

I'm interested to call Python from a DuMux application (embedded Python). Has 
anyone tried this before with DuMux? I'm also interested to use embedded Python 
in a parallel application in combination with MPI4py.

Maybe it is a good idea if I open an issue in gitlab and try to add a small 
test (dumux/test/python) to check if/how embedded Python works.

Best regards,

Leo


Im Auftrag

Dr.-Ing. Leopold Stadler

--
Referat Numerische Verfahren im Wasserbau
Abteilung Wasserbau im Binnenbereich

Bundesanstalt für Wasserbau
Federal Waterways Engineering and Research Institute
Kußmaulstraße 17 | 76187 Karlsruhe

https://www.baw.de


_______________________________________________
DuMux mailing list
DuMux@listserv.uni-stuttgart.de
https://listserv.uni-stuttgart.de/mailman/listinfo/dumux


Im Auftrag

Dr.-Ing. Leopold Stadler

--
Referat Numerische Verfahren im Wasserbau
Abteilung Wasserbau im Binnenbereich

Bundesanstalt für Wasserbau
Federal Waterways Engineering and Research Institute
Kußmaulstraße 17 | 76187 Karlsruhe

https://www.baw.de

_______________________________________________
DuMux mailing list
DuMux@listserv.uni-stuttgart.de
https://listserv.uni-stuttgart.de/mailman/listinfo/dumux

Reply via email to