I just recently made some Python wrappers for a Modern Fortran optimization library for derivative free optimization. https://github.com/libprima/prima https://

I just recently made some Python wrappers for a Modern Fortran optimization library for derivative free optimization. https://github.com/libprima/prima https://github.com/libprima/prima It basically had to go through Fortran -> C -> C++ (with pybind11) -> Python. At one point we had a slightly simpler setup with Fortran -> C -> Python (with ctypes), but ended up going with pybind11 after some discussion with the SciPy folks who steered us away from ctypes.