Ctypeslib is a code generator capable of converting C header files into xml files (using gccxml), and then converting the xmlfiles into Python modules which define a ctypes interface to the corresponding C library.

Ctypeslib is not ctypes. Ctypes is included in python2.5+, while ctypeslib is a lesser known add-on by the ctypes author. If you use ctypes a lot and are tired of setting argtypes and restype of the called functions, you should look into ctypeslib. Ctypeslib can also set up data types and structures from C header files automatically. Ctypeslib could be used to integrate Python with an existing C project, or from the start with a new project to ease development of a Python/C interface.