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I tried to compile the python bindings (pyfann) for FANN via python setup.py install. With an installed Visual Studio 2010 and SWIGWIN I get several errors.

Has anyone a precompiled version of the python bindings for Python 2.7 under Windows 7 and/or 8? I also tried that one pyfann under windows, but the build of _libfann.pyd aborted.

1 Answers1

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I have compiled fann for python 2.7.
You can download it from here: https://github.com/jacekm-git/pyfann_python2.7_windows

Compilation steps :

1. Swig installation:

  • download: sourceforge.net/projects/swig/files/swigwin/
  • extract files to C:\swigwin\
  • edit system path variable
    • rigth click MyComputer -> properties
    • "advanced" tab -> "Environment Variables"
    • edit "Path" variable -> add ";C:\swigwin\;C:\python27\;C:\python27\Scripts\" on the end of the line.

2. Microsoft Visual C++ Studio 2008 Express:

  • download and install : go.microsoft.com/?linkid=7729279

3. Fann 2.1

4. Compile fanndoubled.dll

  • open C:\fann\MicrosoftWindowsDll\windll.vcproj in Visual C++ Studio 2008
  • Build -> Build windll
  • copy files fanndoubled.dll, fanndoubled.lib to C:\fann\python\pyfann

5. Swig

  • open command prompt

    cd c:\fann\python\pyfann\
    swig -c++ -python pyfann.i
  • open in Visual C++ Studio 2008 C:\fann\python\pyfann.wrap.cxx
    • find line( ctrl+f) : SWIGINTERN PyObject *_wrap_training_data_parent_create_train_from_callback


    SWIGINTERN PyObject *_wrap_training_data_parent_create_train_from_callback(PyObject*SWIGUNUSEDPARM(self), PyObject *args) {
      PyObject *resultobj = 0;
      FANN::training_data *arg1 = (FANN::training_data *) 0 ;
      unsigned int arg2 ;
      unsigned int arg3 ;
      unsigned int arg4 ;
      void (*arg5)(unsigned int,unsigned int,unsigned int,fann_type *,fann_type *) = (void (*)(unsigned int,unsigned int,unsigned int,fann_type *,fann_type *)) 0 ;
      // .... rest of file ...

change to:



    typedef void (__stdcall *arg5_fn)(unsigned int, unsigned int, unsigned int, fann_type*, fann_type*); // added line 
    SWIGINTERN PyObject *_wrap_training_data_parent_create_train_from_callback(PyObject *SWIGUNUSEDPARM(self), PyObject *args) {
      PyObject *resultobj = 0;
      FANN::training_data *arg1 = (FANN::training_data *) 0 ;
      unsigned int arg2 ;
      unsigned int arg3 ;
      unsigned int arg4 ;
      /* void (*arg5)(unsigned int,unsigned int,unsigned int,fann_type *,fann_type *) = (void (*)(unsigned int,unsigned int,unsigned int,fann_type *,fann_type *)) 0 ;*/
      arg5_fn arg5= (arg5_fn)NULL; // added line
      // ....

6. setup.py

  • open in editor C:\fann\python\pyfann\setup.py
  • find and comment lines:


    # swig_cmd = 'swig -c++ -python pyfann/pyfann.i'
    # print 'Running SWIG before:', swig_cmd
    # os.system(swig_cmd)
  • change setup lines to:


    ext_modules=[Extension('pyfann._libfann',['pyfann/pyfann_wrap.cxx'], 
                            include_dirs=['../src/include'], 
                            # extra_objects=['../src/doublefann.o'], 
                            libraries = ['pyfann/fanndoubled'],
                            define_macros=[("SWIG_COMPILE",None)]
                                ),

7. installation



    cd C:\fann\python\
    python setup.py install
    copy C:\fann\python\pyfann\fanndoubled.dll C:\Python27\Lib\site-packages\pyfann\
jacekm
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