Pysaprfc is a wrapper around SAP librfc (librfc32.dll on Windows, librfccm.so or librfc.so on Linux). It uses the excellent ctypes extension package by Thomas Heller to access librfc and to define SAP compatible datatypes.
In times I started developing pysaprfc module there was no publicly available interface to access SAP from within Python. Things has changed lately as there is now a saprfc.py module written by the author of saprfc Perl and Ruby modules, Piers Harding. Being in an early development stage (as is my module), it currently provides basic mechanisms to access and manipulate SAP data structures and perform remote function calls using a small C wrapper around needed routines defined by librfc. Using ctypes my module has a small advantage over saprfc.py by having access to the whole of the librfc (almost, some ctypes limitations apply) without having the need to write (and compile) C wrappers. By examining Piers Hardings code (he's much greater SAP expert as I am) I also got some ideas how to generalize data and interface querrying to make my module more flexible. Other than that both projects are using different strategies and are developed independetly of each other - it's your choice which one suits your needs better.
My main goal is to make Python a first class citizen of the SAP world - usefull both for client and server side (remote functions implemented in Python) programming. Currently only the client side is supported though.
In my opinion Python with its agile nature, fast development cycles and rich library of extension modules and packages is ideal companion to SAP system offering connectivity to external systems (web servers, external applications, RDBMs via Python DB API etc).
As of version 0.2.1 all RFC-enabled SAP systems should be supported by pysaprfc.
Downloads are available here.
Just copy pysap.py somewhere on your PYTHONPATH (site-packages for example). You can also use distutils, just
cd to the folder where you unpacked the archive and type
Documentation is available from SourceForge project site.
Python SAP RFC module is licensed under Python licence.