Description:

The Python X Library is intended to be a fully functional X client
library for Python programs. It is written entirely in Python, in
contrast to earlier X libraries for Python (the ancient X extension
and the newer plxlib) which were interfaces to the C Xlib.

This is possible to do since X client programs communicate with the X
server via the X protocol. The communication takes place over TCP/IP,
Unix sockets, DECnet or any other suitable streaming network protocol.
The C Xlib is merely an interface to this protocol, providing
functions suited for a C environment.

There are three advantages of choosing to implement a pure Python
library:
- Integration: The library can make use of the wonderful object system
in Python, providing an easy-to-use class hierarchy.
- Portability: The library will be usable on (almost) any computer
which have Python installed. A C interface could be problematic to
port to non-Unix systems, such as MS Windows or OpenVMS.