Stefan, many thanks, that of course did the trick. I'm not seeing the wood for the trees any more, I fear.
> > what's the recommended way to check if an object instance is an instance of > > my extension class > > in C++ code? > > > > I'm currently doing a very ugly > > > > #define isMyExtensionClass(pyobj) (strcmp(pyobj->ob_type->tp_name, > > "MyExtensionClass") == 0) > > > > on PyObj* pyobj. > > > > I bet there is a better way but just can't seem to find it. > > bpl::extract<MyExtensionClass> e(pyobj); > if (e.check()) ... > > Note that you may want to use a reference type as template argument to > the boost::python::extract type, if you want to retrieve the object by > reference instead of by value. > > See http://www.boost.org/doc/libs/1_40_0/libs/python/doc/v2/extract.html > for details. Just for the record, this is what I do now: inline bool isMyExtensionClass(PyObject* &pyobj) { bp::extract<MyExtensionClass&> extractor(pyobj); return extractor.check(); } inline bool isMyExtensionClass(bp::object &obj) { bp::extract<MyExtensionClass&> extractor(obj); return extractor.check(); } Thanks again & have a nice weekend Holger Landesbank Baden-Wuerttemberg Anstalt des oeffentlichen Rechts Hauptsitze: Stuttgart, Karlsruhe, Mannheim, Mainz HRA 12704 Amtsgericht Stuttgart _______________________________________________ Cplusplus-sig mailing list Cplusplus-sig@python.org http://mail.python.org/mailman/listinfo/cplusplus-sig
