\chapter{Introduction}

The Python library consists of three parts, with different levels of

integration with the interpreter.

Closest to the interpreter are built-in types, exceptions and functions.

Next are built-in modules, which are written in \C{} and linked statically

with the interpreter.

Finally there are standard modules that are implemented entirely in

Python, but are always available.

For efficiency, some standard modules may become built-in modules in

future versions of the interpreter.

\indexii{built-in}{types}

\indexii{built-in}{exceptions}

\indexii{built-in}{functions}

\indexii{built-in}{modules}

\indexii{standard}{modules}

\indexii{\C{}}{language}