#40 Problems with check method when dealing with derived class

[Ben Webb]

In the file ExtensionsType.hxx, the following code

static bool check( PyObject *p )
{
// is p like me?
return p->ob_type == type_object();
}

    needs to be changed to the following to handled derived classes

static bool check( PyObject p )
{
return PyObject_IsInstance(p, (type())) ? true : false;
}

    This allows the following code to work when a class defined in a py file is derived from a c++ new style class

    Py::PythonClassObject<dlPyProgress> pyProgress(obj);
return &pyProgress.getCxxObject()->m_Progress;

Without the change the Py::PythonClassObject line throws an exception

[Barry Alan Scott]

Thanks for the report.
Please see r340 that fixes this issue.
You will see that I built on your solution and added test code.
Note: PyObject_IsInstance can return 1, 0 or -1