I am trying to wrap c++ functions into python using swig. I am using following commands
swig -c++ -python helloworld.i
g++ -O2 -fPIC -c hello.cpp
g++ -O2 -fPIC -c helloworld_wrap.cxx -I//anaconda/include/python2.7
g++ -lpython -dynamclib hello.o helloworld_wrap.o -o _helloworld.so
with hello.cpp being initial file with functions and helloworld.i being file with wrapper. These commands creates the library helloworldbut I can only import it through default python in /usr/bin/python
If I try to import it through python installed through anaconda it gives following error:
Fatal Python error: PyThreadState_Get: no current thread
Abort trap: 6
Can you tell me how can I wrap the codes with python from anaconda?
Found a solution : Python.h not found using swig and Anaconda Python
In above question, the top answer gives an explanation of using disutilsand a set up file in python to build the library. This works wonders :)
The next problem I am having for wrapping simple class:
my class code from [example] (http://web.mit.edu/svn/src/swig-1.3.25/Examples/python/class/index.html)
/* File : example.h */
class Shape {
public:
Shape() {
nshapes++;
}
virtual ~Shape() {
nshapes--;
};
double x, y;
void move(double dx, double dy);
virtual double area() = 0;
virtual double perimeter() = 0;
static int nshapes;
};
class Circle : public Shape {
private:
double radius;
public:
Circle(double r) : radius(r) { };
virtual double area();
virtual double perimeter();
};
class Square : public Shape {
private:
double width;
public:
Square(double w) : width(w) { };
virtual double area();
virtual double perimeter();
};
My setup.py file :
#setup.py file:
from setuptools import setup, Extension
setup(name='example',
version='0.1',
ext_modules=[Extension('_example', ['example.h', 'example.i'],
swig_opts=['-c++'],
)],
)
Code I am using to wrap :
python setup.py build_ext --inplace
Error message:
running build_ext
building '_example' extension
swigging example.i to example_wrap.cpp
swig -python -c++ -o example_wrap.cpp example.i
error: unknown file type '.h' (from 'example.h')
Can you suggest what is wrong here. I suppose it is not recognizing '.h' file but as it is header file, I thought it could be kept as it is. Also if my setup.py file is correct or not? I am just trying to follow example for simple wrapping, there is no simple tutorial online apparently.
I can also ask this question on other different question but thought just continuing here for now.
