Custom Types

I am looking for a better way to write a a custom method wrapper to help me with non standard type conversions.

What I would like to do is write:

>>> SomeClass.add_function_as_method( 'some_function_X', Parameter.new('PyObject*') , [Parameter.new( 'SomeClass*', 'set', transfer_ownership=False)], custom_name='method_X' )

Where I link with a c++ file that defines the function:

    PyObject* some_function_X( SomeClass* something );

Is this possible? I have tried this and I see the following code is generated:

    retval = particle_str(self->obj);
    py_retval = Py_BuildValue((char *) "N", retval);
    return py_retval;

Is there anything similar that I can try?