Python has a standard library that it is shipped with, plus many add-on libraries such as PyGame, which is a set of Python modules designed for writing games. It is written on top of the SDL library. Other libraries include The Python Imaging Library, which makes it easier to write programs that deal with images. Aside from libraries Python has many other benefits such as 'Extensions' which are basically C code that extends the functionality of the language. Some extensions include language bindings, for example:
Other extensions are possible through the Python/C API (Application Programmers Interface) On top of the language bindings you can also find packages to extend python much like the libraries, only smaller. To find python packages you should start at http://python.org or even simply use a search engine.