Surrogates python package Windows

[leonardoungureanu6-jpg]

Hello, I'm building a surrogate and I wanted to construct and evaluate it following the example at 'dakota_install\share\dakota\examples\official\surrogates\library'. To the example is attached an html link, where it is stated 'The surrogates module is located within the dakota package', so it can be used as 'import dakota.surrogates as daksurr'.
I have downloaded the windows version of Dakota 6.21.0, and I don't have that library. I noticed that in the linux version the 'surrogates.cpython-312-x86_64-linux-gnu.so' file is available.
Is it available for the Windows version too? If yes, where can I find/download it?

[sgindeed]

Dakota’s Python surrogates module (import dakota.surrogates as daksurr) is not included in the official Windows binaries of Dakota 6.21.0. Only the Linux distribution ships with the compiled extension file (surrogates.cpython-312-x86_64-linux-gnu.so), which is why you can import it on Linux but cannot find a .pyd or .dll equivalent on Windows.

Key points:

• The Windows installer does not provide the surrogates Python module.
• Only the Linux build includes the compiled Python extension.
• Because of this, import dakota.surrogates will always fail on Windows.
• Dakota currently provides no official Windows build of this module.
• The documentation assumes Linux for Python-based surrogate modeling.

If you need the module on Windows, you have two practical options:

1. Compile Dakota from source on Windows

   • Enable the Python interface and Surrogates during CMake configuration.
   • You must have:
     • Python 3.12 dev headers
     • CMake
     • A supported C++ compiler
   • Example CMake configuration:

     cmake -DDAKOTA_PYTHON=ON ^
           -DDAKOTA_SURROGATES=ON ^
           -DPython_EXECUTABLE="C:/Path/to/python.exe" ^
           ..
     

   • After building, you will get a .pyd file equivalent to the Linux .so.

2. Use WSL or a Linux environment

   • Easiest and most reliable way.
   • Install the Linux version of Dakota:

     sudo apt install ./dakota-6.21.0-linux.deb
     

   • Then you can directly do:

     import dakota.surrogates as daksurr
     

In summary: the surrogates module is officially available only on Linux, and Windows users must either compile it themselves or run Dakota inside a Linux environment.