Python-LZO provides Python bindings for the LZO data compression library. You can access the LZO library from your Python scripts thereby compressing ordinary Python strings. LZO is a portable lossless data compression library written in ANSI C. It offers pretty fast compression and *very* fast decompression. Decompression requires no memory. In addition there are slower compression levels achieving a quite competitive compression ratio while still decompressing at this very high speed.
PyGTK is a set of Python bindings for the GTK widget set. It provides an object oriented interface that is slightly higher level than the C one. It automatically does all the type casting and reference counting that you normally would have to do with the C API.