[Boost-users] [Python] Embedding and Extending problem

21 Apr 2005


      I've tried to merge the Boost.Python tutorials for embedding and extending 
(see below), to end up with an executable that does both.  The script fails 
to import "hello", so BOOST_PYTHON_MODULE is presumably not the correct way 
to do it.  What is?

Thanks,
Keith MacDonald


====== The C++ code ======
#include <boost/python.hpp>

using namespace boost::python;

char const* greet()
{
    return "hello, embedded world";
}

BOOST_PYTHON_MODULE(hello)
{
    def("greet", greet);
}

int main()
{
    Py_Initialize();

    object main_module((
        handle<>(borrowed(PyImport_AddModule("__main__")))));

    object main_namespace = main_module.attr("__dict__");

    try {
        handle<> ignored((PyRun_String(
            "import hello\n"
            "print hello.greet()\n"
          , Py_file_input
          , main_namespace.ptr()
          , main_namespace.ptr())
        ));
    }
    catch(error_already_set)
    {
        PyErr_Print();
    }

    Py_Finalize();
    return 0;
}

====== The Jamfile ======
subproject libs/python/example/tutorial/embedded ; # location of the program

# bring in the rules for python
SEARCH on python.jam = $(BOOST_BUILD_PATH) ;
include python.jam ;

exe hello # name of the executable
  : #sources
  hello.cpp
  : # requirements
  <find-library>boost_python <library-path>c:\boost\libs\python
  $(PYTHON_PROPERTIES)
 <library-path>$(PYTHON_LIB_PATH)
 <find-library>$(PYTHON_EMBEDDED_LIBRARY) ;