Best documentation for writing wrappers for C++ classes

[David L. Humphrey]

I have several C++ classes that I would like to call from Python code.  I
have reviewed the "Extending and Embedding the Python Interpreter" as well
as selected portions of "Programming Python" but worry a little about the
currency of these sources as well as the general tone of extending with C
code rather than C++ classes.  Is there a document that is recognized as the
standard reference for this information?

Thanks in advance,
David L. Humphrey
Manager, Software Development
Bell Geospace, Inc