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+\section{Built-in module \sectcode{md5}}
+\bimodindex{md5}
+
+This module implements the interface to RSA's MD5 message digest
+algorithm (see also the file \file{md5.doc}). It's use is very
+straightforward: use the function \code{md5} to create an
+\dfn{md5}-object. You can now ``feed'' this object with arbitrary
+strings.
+
+At any time you can ask the ``final'' digest of the object. Internally,
+a temorary copy of the object is made and the digest is computed and
+returned. Because of the copy, the digest operation is not desctructive
+for the object. Before a more exact description of the use, a small
+example: to obtain the digest of the string \code{'abc'}, use \ldots
+
+\bcode\begin{verbatim}
+>>> from md5 import md5
+>>> m = md5()
+>>> m.update('abc')
+>>> m.digest()
+'\220\001P\230<\322O\260\326\226?}(\341\177r'
+\end{verbatim}\ecode
+
+More condensed:
+
+\bcode\begin{verbatim}
+>>> md5('abc').digest()
+'\220\001P\230<\322O\260\326\226?}(\341\177r'
+\end{verbatim}\ecode
+
+\renewcommand{\indexsubitem}{(in module md5)}
+\begin{funcdesc}{md5}{arg}
+  Create a new md5-object. \var{arg} is optional: if present, an initial
+  \code{update} method is called with \var{arg} as argument.
+\end{funcdesc}
+
+An md5-object has the following methods:
+
+\renewcommand{\indexsubitem}{(md5 method)}
+\begin{funcdesc}{update}{arg}
+  Update this md5-object with the string \var{arg}.
+\end{funcdesc}
+
+\begin{funcdesc}{digest}{}
+  Return the \dfn{digest} of this md5-object. Internally, a copy is made
+  and the \C-function \code{MD5Final} is called. Finally the digest is
+  returned.
+\end{funcdesc}
+
+\begin{funcdesc}{copy}{}
+  Return a separate copy of this md5-object.  An \code{update} to this
+  copy won't affect the original object.
+\end{funcdesc}