An abstract Shogun example language

c++.cpp

#include <shogun/kernel/GaussianKernel.h>
#include <shogun/features/DenseFeatures.h>

using namespace shogun;

int main(int argc, char** argv)
{
	init_shogun_with_defaults();

	// comment: strongly typed c++ kind of style here, but doesn't have to be
	CCSVFile* file=new CCSVFile("filename", 'w');
	SG_REF(file);
	CDenseFeatures<float64_t>* features=CDenseFeatures<float64_t>(file);
	SG_REF(features);
	float64_t kernel_width=2;
	CGaussianKernel* kernel=new CGaussianKernel(kernel_width);
	SG_REF(kernel);
	kernel->init(features, features);
	SGMatrix<float64_t> K=kernel.get_kernel_matrix();


        // some code to serialise all Shogun objects for integration testing
        // ...

	SG_UNREF(file);
	SG_UNREF(features);
	SG_UNREF(kernel);

	exit_shogun();
	return 0;
}

octave.m

modshogun

% comment: strongly typed c++ kind of style here, but doesn't have to be
file=CSVFile('filename');
features=RealFeatures(file);
kernel_width=2;
kernel=GaussianKernel(kernel_width);
K=kernel.get_kernel_matrix();

% some code to serialise all Shogun objects for integration testing
% ...

python.py

def example ():
	from modshogun import RealFeatures, GaussianKernel, CSVFile

        # comment: strongly typed c++ kind of style here, but doesn't have to be
        file=CSVFile("filename");
        features=RealFeatures(file);
        kernel_width=2;
        kernel=GaussianKernel(kernel_width);
        K=kernel.get_kernel_matrix();
	
        # some code to serialise all Shogun objects for integration testing
        # ...

Shogun_language.sho

// comment: strongly typed c++ kind of style here, but doesn't have to be
CCSVFile file=CCSVFile("filename");
RealFeatures features=RealFeatures(file);
float64 kernel_width=2;
GaussianKernel kernel=GaussianKernel(kernel_width);
SGMatrix<float64> K=kernel.get_kernel_matrix();

I would go for extension .sg.