Numpy setup error : extra formal argument

Question

I have some Fortran files I would like to use in Python files. I have used the command C:\Python27\python.exe setup.py build_ext --inplace --fcompiler=g95. My setup.py file contains the following code:

import sys, os
extra_link_args = []
extra_link_args = ['-framework', 'accelerate']
from numpy.distutils.core import setup, Extension
opt_flags = ['-g', '-fbounds-check', '-I/usr/include/']
files1 = ['particle_solvers/fbsl_sim_fmod.f90',
          'particle_solvers/fbsl_parts_fmod.f90',
          'particle_solvers/fbsl_poisson_fmod.f90',
          'particle_solvers/fbsl_convol_fmod.f90',
          'particle_solvers/fbsl_lbfr_parts_fmod.f90',
          'particle_solvers/fbsl_ltp_parts_fmod.f90',
          'particle_solvers/fbsl_pusher_fmod.f90',
          ]
ext1 = Extension(name='_fbsl_f90',
                 sources=files1,
                 extra_compile_args=opt_flags,
                 extra_link_args=extra_link_args)
setup(name="_fbsl_f90",
      version='0.1',
      description="Hidden",
      author="Hidden",
      author_email='Hidden',
      url='',
      ext_modules=[ext1])

But I have got the following errors :

g95.exe:f90: build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:211
     &ef2pywrap, smooth_heaviside, r)
                                   1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_smooth_heaviside' at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:13
     &nf2pywrap, t)
                 1
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:217
     &nf2pywrap, f_exact_is_known, t)
                 2
Error: Differing types REAL(8) and LOGICAL(4) in formal arguments at (1) and (2)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:223
     &inal_is_knownf2pywrap, f_exact_final_is_known)
                             1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_f_exact_final_is_known'
at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:228
     &2pywrap, f_exact_initial, eta_0, eta_1)
                                       1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_f_exact_initial' at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:235
     &, t, eta_0, eta_1)
                  1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_f_exact' at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:243
     &rap, f_exact_final, eta_0, eta_1)
                                 1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_f_exact_final' at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:250
     &_field_is_givenf2pywrap, velocity_field_is_given)
                               1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_velocity_field_is_given'
 at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:255
     &ine_u0, x0, x1)
                  1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_affine_u0' at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:262
     &ine_u1, x0, x1)
                  1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_affine_u1' at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:269
     &p, quadratic_u0, t, x0, x1)
                              1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_quadratic_u0' at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:277
     &p, quadratic_u1, t, x0, x1)
                              1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_quadratic_u1' at (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:285
     &w_0f2pywrap, bwd_affine_flow_0, t, x0, x1)
                                             1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_bwd_affine_flow_0' at (1
)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:293
     &w_1f2pywrap, bwd_affine_flow_1, t, x0, x1)
                                             1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_bwd_affine_flow_1' at (1
)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:301
     &ic_flow_0f2pywrap, bwd_quadratic_flow_0, t, x0, x1)
                                                      1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_bwd_quadratic_flow_0' at
 (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:309
     &ic_flow_1f2pywrap, bwd_quadratic_flow_1, t, x0, x1)
                                                      1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_bwd_quadratic_flow_1' at
 (1)
In file build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90:317
     &0, x1)
         1
Error: Extra formal argument for 'f2pywrap_fbsl_sim_f90_bggk_a' at (1)
error: Command "C:\Users\QUENTIN\bin\g95.exe -fno-second-underscore -O -Ibuild\s
rc.win32-2.7 -IC:\Python27\lib\site-packages\numpy\core\include -IC:\Python27\in
clude -IC:\Python27\PC -c -c build\src.win32-2.7\_fbsl_f90-f2pywrappers2.f90 -o
build\temp.win32-2.7\Release\build\src.win32-2.7\_fbsl_f90-f2pywrappers2.o -fmod
=build\temp.win32-2.7\Release\ -Ibuild\temp.win32-2.7\Release\" failed with exit
 status 1

I don't understand why I have those Extra formal argument errors. How can I fix them ? I am working on Windows 7 with Python 2.7 and g95 compiler.

EDIT : Okay, to simplify, here is a sample of my Fortran code :

module test_f90

implicit none

real *8 :: delta

contains

real*8 function test_f(r)
    real*8, intent(in) :: r
    test_f = 0.5*( 1 + erf(r/delta) )
end function

end module test_f90

When I use the command C:\Python27\python.exe setup.py build_ext --inplace --fcompiler=g95 with this setup.py file :

import sys

extra_link_args = []

from numpy.distutils.core import setup, Extension

opt_flags = ['-g', '-fbounds-check', '-I/usr/include/']


files1 = ['test_fmod.f90',
          ]


ext1 = Extension(name='_test_f90',
                 sources=files1,
                 extra_compile_args=opt_flags,
                 extra_link_args=extra_link_args)


setup(name="_test_f90",
      version='0.1',
      description="test module",
      author="Hidden",
      author_email='Hidden',
      url='',
      ext_modules=[ext1])

I have got this Fortran file generated by f2py :

!     -*- f90 -*-
!     This file is autogenerated with f2py (version:2)
!     It contains Fortran 90 wrappers to fortran functions.

      subroutine f2pywrap_test_f90_test_f (test_ff2pywrap, r)
      use test_f90, only : test_f
      real(kind=8) r
      real(kind=8) test_ff2pywrap
      test_ff2pywrap = test_f(r)
      end subroutine f2pywrap_test_f90_test_f

      subroutine f2pyinittest_f90(f2pysetupfunc)
      use test_f90, only : delta
      interface 
      subroutine f2pywrap_test_f90_test_f (test_ff2pywrap, test_f, r)
      real(kind=8) test_f
      real(kind=8) r
      real(kind=8) test_ff2pywrap
      end subroutine f2pywrap_test_f90_test_f
      end interface
      external f2pysetupfunc
      call f2pysetupfunc(delta,f2pywrap_test_f90_test_f)
      end subroutine f2pyinittest_f90

but I still have this error :

g95.exe:f90: build\src.win32-2.7\_test_f90-f2pywrappers2.f90
In file build\src.win32-2.7\_test_f90-f2pywrappers2.f90:15

      subroutine f2pywrap_test_f90_test_f (test_ff2pywrap, test_f, r)
                                                                   1
Error: Extra formal argument for 'f2pywrap_test_f90_test_f' at (1)
error: Command "C:\Users\QUENTIN\bin\g95.exe -fno-second-underscore -O -Ibuild\s
rc.win32-2.7 -IC:\Python27\lib\site-packages\numpy\core\include -IC:\Python27\in
clude -IC:\Python27\PC -c -c build\src.win32-2.7\_test_f90-f2pywrappers2.f90 -o
build\temp.win32-2.7\Release\build\src.win32-2.7\_test_f90-f2pywrappers2.o -fmod
=build\temp.win32-2.7\Release\ -Ibuild\temp.win32-2.7\Release\" failed with exit
 status 1

Answer 1

Sorry, it appears the f2py wrapper support is broken, as it declares a function twice with conflicting signatures: first 2 then 3 formal arguments. It's not clear this version will work for you as desired, though you might find it useful to work through the examples of the first few f2py ToC entries.