fortran spectral partitioning in windows.

[cehiles]

Hello,

First thanks for publishing this super useful toolbox! I have been testing it for the last few days, including the spectral partitioning, on both Linux and Windows. On Linux I can get wavespectra installed as per the installation instructions. On Linux I can get both the pure python and Fortran spectral partitioning to work as expected.

On Windows, I can get wavespectra installed as per the installation instructions. It appears to find my gfortran installation and compile specpart. I can get spectral partitioning working via the pure Python code. When I try to execute partitioning with the Fortran code:

from wavespectra import read_swan
ds = read_swan('./wavespectra/tests/sample_files/swanfile.spec')
ds_part = ds.spec.partition( fortran_code=True)

i get the following error:

Traceback (most recent call last):
File "test_readspec_simple.py", line 7, in <module>
ds_part = ds.spec.partition( fortran_code=True)
File "c:\users\clayton\primed\projects\xxxx\analysis\wavespectra\wavespectra\specarray.py", line 766, in partition from wavespectra.specpart import specpart
ImportError: DLL load failed while importing specpart: The specified module could not be found.

Has the Fortran spectral partitioning been tested on Windows? I am not very familiar with the integration of Fortran code with Python so this error is a bit challenging for me to chase down. Any assistance would be greatly appreciated.

Thank you,

Clayton

[jorgeperezg]

Hi Clayton,

I gave it a try at some point but I am not familiar with how these things work in windows and I couldn't make it work.

I'll try again but if anyone has any experience with this kind of errors it would be great to get some ideas.

[cehiles]

Hi Jorge,

Thanks for the response. I'll keep testing on Linux for now. I'll let you know if I make any headway on getting Fortran partitioning to work on Windows. Cheers!

[cehiles]

Hi Jorge,

I managed to get Fortran partitioning working on Windows. First I had to ensure that I had the 64 bit version of MinGW installed. I suspect that this needed match the 64 bit Python I am using. The path to the mingw binaries needs to be on the Windows PATH environment variable.

Next I created a new environment in Anaconda. Installed the dependencies via 'conda install', rather than pip, because for some reason pip was having trouble resolving the dependencies. I installed wavespectra via 'python setup.py install'.

After installation, I had to move some files around in the install directory. The library libspecpart.V2QNEESD6CQQJ6CKLCOFJS5TYBWU4J3X.gfortran-win_amd64.dll had to be copied from \wavespectra.libs\ to \wavespectra\ . I created a new directory \wavespectra\specpart\ . I copied specpart.py from \wavespectra\ to \wavespectra\specpart.

I have not tested extensively, but partitioning with Fortran in Windows now seems to be working.

Cheers!

Clayton

[jorgeperezg]

Thanks a lot for looking into it. I'll add a link to your comment in the Readme file to help other users that may have similar problems.

[RubendeBruin]

We managed to get the wavespectra/wavespectra fork on conda-forge.

This means that the compiled version of the fortran module can be obtained by installing wavespectra via conda:

conda install wavespectra -c conda-forge

or

mamba install wavespectra -c conda-forge

this will download the compiled version:

I suspect that you can just copy the .pyd file (windows) and use it. Just make sure that you're using the same python version.