Python complaining that a SWIG module doesn't exists - c++

Question

Following the different tutorials on the web, I have tried to make a wrapper of a c++ class in python, using SWIG.
My class looks like this:
/*file libraryInstance.h*/
struct LibraryInstance
{
void init();
void terminate();
private:
std::shared_ptr<AnObject> m_spAnObject;
};
For python exposition, I made this .i file:
%module LibraryInstance
%{
#include "libraryInstance.h"
%}
%include "libraryInstance.h"
then I have executed the command swig -c++ -python -o ./src/libraryInstance_wrap.cpp ./src/libraryInstance.i
without any output errors, swig has generated two files, libraryInstance_wrap.cpp and LibraryInstance.py
Then I compile the c++ files, including the libraryInstance_wrap.cpp. All compiles fine and I get my library .so file.
when I look into the swig generated LibraryInstance.py, I can clearly see the class LibraryInstance:
cf. entire generated python wrapper here.
But when I launch the command python LibraryInstance.py, in the same directory as my .so I see this error output:
Traceback (most recent call last):
File "LibraryInstance.py", line 26, in <module>
_LibraryInstance = swig_import_helper()
File "LibraryInstance.py", line 18, in swig_import_helper
import _LibraryInstance
ImportError: No module named _LibraryInstance
And when I look in the code of LibraryInstance.py, it just looks as if there has been an exception ImportError thrown, the the module cannot be found by python. ( line 18 ).
Any idea what should I do to correct this ?

Answer 1

In SWIG documentation, paragraph 31.2.2 it is stated that the name of the library .so should be _NameOfTheModule.so
So I have renammed my library _LibraryInstance.so, instead of LibraryInstance.so... and now my module loads fine.