On Thu, January 15, 2009 6:17 pm, Sturla Molden wrote:

Is it possible to make f2py raise an exception if a fortran routine signals an error?

If I e.g. have

subroutine foobar(a, ierr)

Can I get an exception automatically raised if ierr != 0?

Yes, for that you need to provide your own fortran call code using f2py callstatement construct. The initial fortran call code can be obtained from f2py generated <modulename>module.c file, for instance. An example follows below: Fortran file foo.f: ------------------- subroutine foo(a, ierr) integer a integer ierr if (a.gt.10) then ierr=2 else if (a.gt.5) then ierr=1 else ierr = 0 end if end if end Generated (f2py -m m foo.f) and then modified signature file m.pyf: ------------------------------------------------------------------- ! -*- f90 -*- ! Note: the context of this file is case sensitive. python module m ! in interface ! in :m subroutine foo(a,ierr) ! in :m:foo.f integer :: a integer :: ierr intent (in, out) a intent (hide) ierr callstatement ''' (*f2py_func)(&a, &ierr); if (ierr==1) { PyErr_SetString(PyExc_ValueError, "a is gt 5"); } if (ierr==2) { PyErr_SetString(PyExc_ValueError, "a is gt 10"); } ''' end subroutine foo end interface end python module m ! This file was auto-generated with f2py (version:2_5618). ! See http://cens.ioc.ee/projects/f2py2e/ Build the extension module and use from python: ----------------------------------------------- $ f2py -c m.pyf foo.f $ python

...

...

import m m.foo(30)

<type 'exceptions.ValueError'> Traceback (most recent call last) /home/pearu/test/f2py/exc/<ipython console> in <module>() <type 'exceptions.ValueError'>: a is gt 10

...

...

m.foo(6)

<type 'exceptions.ValueError'> Traceback (most recent call last) /home/pearu/test/f2py/exc/<ipython console> in <module>() <type 'exceptions.ValueError'>: a is gt 5

...

...

m.foo(4) 4

HTH, Pearu