Newbie question: Specifying custom parameter types

For l_int32 case:

  from pybindgen.typehandlers import base as typehandlers
  typehandlers.add_type_alias('int32_t', 'l_int32')

For the PIX **, you're out of luck. You'd have to make your own type handler, which is not trivial and not well documented. If it's only that one method, maybe you're better off just manually writing a custom wrapper. Something along these lines:

    wrapper_body = '''
static PyObject *
_wrap_Pix_Destroy(PyPIX *self, PyObject *args, PyObject *kwargs,
                        PyObject **return_exception)
{
    PyObject *py_retval;
    const char *keywords[] = {NULL};

    if (!PyArg_ParseTupleAndKeywords(args, kwargs, (char *) "", (char **) keywords)) {
        PyObject *exc_type, *traceback;
        PyErr_Fetch(&exc_type, return_exception, &traceback);
        Py_XDECREF(exc_type);
        Py_XDECREF(traceback);
        return NULL;
    }
    pixDestroy (&self->obj);
    Py_INCREF(Py_None);
    return Py_None;
}
'''
    pix.add_custom_method_wrapper("Destroy", "_wrap_Pix_Destroy",
                                  wrapper_body,
                                  flags=["METH_VARARGS", "METH_KEYWORDS"])

Thanks for astonishingly quick answer!

Unfortunately, a quick search of the rest of the C library's header file that I am trying to access (see Leptonica.com if you're interested) from Python shows LOTS of instances of similar SOMETYPE ** parameters. Mainly seems to be used to return optional data back to caller.

I guess I'll look into Boost.Python, SWIG, or expy, but I really liked the idea of the generator being entirely written in python.