Re: [f2py] threading with f2py

Greetings Charlie,

We went through this with a recent project and we found
that running the Fortran in a thread using
  !f2py threadsafe
does indeed let the Fortran yield back to Python but it
doesn't work if you want to use callbacks from Fortran,
which we did. We ended up using multiprocessing and it
is working well.

Multiprocessing takes longer to start each process than
a thread and you have to make sure the state you need to
pass the process is "pickleable" but that only matters
in practice on Windows because it lacks an OS fork.

(If you think I can be of any further assistance just
give me a call.)

Stuart