Paul Anton Letnes schrieb:
> Hello guys,
>
>
> (related to previous thread on wrapping C/C++ in Python, trying the SWIG
> approach.)
> Trying to map a C++ class to python, one method for now. Running the
> following commands to "compile":
>
> --------------------------------------
> #!/usr/bin/env bash
>
> MOD_NAME=Wavelet
>
>
> swig -c++ -python -o ${MOD_NAME}_wrap.cpp ${MOD_NAME}.i
>
> gcc -c++ -fPIC -c ${MOD_NAME}.cpp -o ${MOD_NAME}.o
> -I/usr/include/python2.5 -I/usr/lib/python2.5
>
> gcc -c++ -fPIC -c ${MOD_NAME}_wrap.cpp -o ${MOD_NAME}_wrap.o
> -I/usr/include/python2.5 -I/usr/lib/python2.5
>
> gcc -bundle -flat_namespace -undefined suppress -o _${MOD_NAME}.so
> ${MOD_NAME}.o ${MOD_NAME}_wrap.o
> --------------------------------------
>
> The source code is:
> --------------------------------------
> Wavelet.h
> --------------------------------------
> #ifndef _WAVELET_H_
> #define _WAVELET_H_
>
> #include <iostream>
> #include <vector>
>
> using namespace std;
>
> class Wavelet
> {
>
> public:
> Wavelet(vector<double> theV);
> ~Wavelet();
> vector<double> GetDaub4Trans();
>
> private:
> vector<double> v;
>
> };
>
>
> #endif /*_WAVELET_H_*/
> --------------------------------------
> and Wavelet.cpp:
> --------------------------------------
> #include "wavelet.h"
>
> Wavelet::Wavelet(vector<double> theV)
> {
> this->v = theV;
> }
>
> Wavelet::~Wavelet()
> {
> // Nothing for now
> }
>
> vector<double> Wavelet::GetDaub4Trans()
> {
> vector<double> retV = vector<double>();
> retV.push_back(3.14);
> retV.push_back(2.71);
> retV.push_back(1.62);
> return retV;
> // just to test the approach - everything in here I can fix later.
> }
> --------------------------------------
> This seems to compile, but in python I get:
> --------------------------------------
> $ python
> imPython 2.5.2 (r252:60911, Mar 30 2008, 22:49:33)
> [GCC 4.0.1 (Apple Inc. build 5465)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import Wavelet
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "Wavelet.py", line 7, in <module>
> import _Wavelet
> ImportError: dlopen(./_Wavelet.so, 2): Symbol not found:
> __ZNKSt11logic_error4whatEv
> Referenced from: /Users/paul/Desktop/Wavelet_SWIG_Cpp/_Wavelet.so
> Expected in: flat namespace
>
> >>>
> --------------------------------------
>
> Any ideas or tips? SWIG seems very nice for simple C methods where you
> pass an int and return an int, but I can't seem to figure out the
> syntaxes etc for more complicated stuff - arrays, vector<T>, C++, ...
> Appreciate any help!
Can't help on SWIG - all I can say is that SIP which is used to wrap the
large and template-ridden C++-GUI-Toolkit Qt worked flawlessly for me.
Maybe you should try that.
Diez
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