The Python binding for Sane is part of Python Imaging Library.

The Python Imaging Library adds image processing capabilities to your
Python interpreter.  This library provides extensive file format
support, an efficient internal representation, and fairly powerful
image processing capabilities.

The PIL handbook is not included in this distribution; to get the
latest version, check: http://www.pythonware.com/library.htm

WWW: http://www.pythonware.com/products/pil/index.htm