在Windows下构建FANN Python绑定

Question

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.

Answer 1

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

• download: http://sourceforge.net/projects/fann/files/fann/2.1.0beta/fann-2.1.0beta.zip/download
• extract files to : C:\\fann\\

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\