2. Defining New Types
As mentioned in the last chapter, Python allows the writer of an extension module to define
new types that can be manipulated from Python code, much like strings and lists in core
This is not hard; the code for all extension types follows a pattern, but there are some
details that you need to understand before you can get started.
Note: The way new types are defined changed dramatically (and for the
better) in Python 2.2. This document documents how to define new types for Python 2.2 and
later. If you need to support older versions of Python, you will need to refer to older
versions of this documentation.