Re: [Boost-users] boost python (compiling an extension)

From: Themistoklis Bourdenas (burdenas_at_[hidden])
Date: 2006-02-05 05:07:20

David Abrahams wrote:
> Themistoklis Bourdenas <burdenas_at_[hidden]> writes:
>
>   
>> I'm trying to build a simple python extension similar to the one in 
>> boost.python tutorial. I really haven't yet understood the process of 
>> creating an extension for python using boost.
>>
>> I have to build boost.python either using bjam or loading its .sln in VS 
>> (I've used the second method).
>>
>> Then I write some simple code like that in the tutorial exporting a 
>> simple function and then what? I guess I have to build a .dll file for 
>> python to link to. I'm building a dynamic link library project in VS8 
>> write the appropriate code and that successfully creates a dll file. 
>> However when importing my module python returns a runtime error:
>> ImportError: dynamic module does not define init function (inittest_boost)
>>     
>
> You're missing a 
>
>        BOOST_PYTHON_MODULE(test_boost)
>
> in there.
>
>   
Actually I don't. Here is my simple test:

/*test_boost.h*/
#ifdef TEST_BOOST_EXPORTS
#define TEST_BOOST_API __declspec(dllexport)
#else
#define TEST_BOOST_API __declspec(dllimport)
#endif

TEST_BOOST_API const char* greet(void);

/*test_boost.cpp*/
// DllMain() and other dll stuff
....
#include <boost/python.hpp>
using namespace boost::python;

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

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

>> What is the .pyd created in the tutorial? How is it created? I'm trying 
>> to avoid bjam as and use just VS project files. Is that possible?
>>     
>
> It's possible, but not supported. :)
>
>   
So what is actually that pyd and how is it created?
>> PS - I know I should send this message in c++-sig list but for three 
>> days now it can not confirm my subscription for some reason.
>>     
>
> Ralf, any clues about that?
>
>   
I have just managed to subscribe to it.
Thanks