best "void" return of a member function

[Terry Reedy]

Andreas Otto wrote:
> Hi,
> 
>   I'm writing a native language binding for a library.
> 
>         http://libmsgque.sourceforge.net/
> 
>   Every native method called by PYTHON have to return
>   a PyObject* even if the function itself does not
>   return anything.
> 
>   I have 2 possibilities for return a PyObject*
> 
>         
>         1. the first argument of the method function
>                 -> return self;
>         2. an entire new empty object
>                 -> return Py_BuildValue("");
> 
>   Question: what is the best return statement for a "void" function ?
> 
>   P.S:  NULL is not allowed, because NULL is returned in the case
>         of an "error"

To provide a Pythonic interface, error returns should often be converted 
to Python exceptions.