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<H1><A NAME="SECTION0014900000000000000000">
12.9 <tt class="module">xdrlib</tt> --
Encode and decode XDR data</A>
</H1>
<P>
<P>
<P>
The <tt class="module">xdrlib</tt> module supports the External Data Representation
Standard as described in <a class="rfc" name="rfcref-47518"
href="javascript:if(confirm('http://www.ietf.org/rfc/rfc1014.txt \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ietf.org/rfc/rfc1014.txt'" tppabs="http://www.ietf.org/rfc/rfc1014.txt">RFC 1014 <img src="offsite.gif" tppabs="http://www.python.org/doc/current/icons/offsite.gif"
border='0' class='offsitelink' height='15' width='17' alt='[off-site link]'
></a>, written by Sun Microsystems,
Inc. June 1987. It supports most of the data types described in the
RFC.
<P>
The <tt class="module">xdrlib</tt> module defines two classes, one for packing
variables into XDR representation, and another for unpacking from XDR
representation. There are also two exception classes.
<P>
<dl><dt><b><a name='l2h-2436'><tt class='class'>Packer</tt></a></b> ()
<dd>
<tt class="class">Packer</tt> is the class for packing data into XDR representation.
The <tt class="class">Packer</tt> class is instantiated with no arguments.
</dl>
<P>
<dl><dt><b><a name='l2h-2437'><tt class='class'>Unpacker</tt></a></b> (<var>data</var>)
<dd>
<code>Unpacker</code> is the complementary class which unpacks XDR data
values from a string buffer. The input buffer is given as
<var>data</var>.
</dl>
<P>
<div class='seealso'>
<p class='heading'><b>See Also:</b></p>
<dl compact class="seerfc">
<dt><a href="javascript:if(confirm('http://www.ietf.org/rfc/rfc1014.txt \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ietf.org/rfc/rfc1014.txt'" tppabs="http://www.ietf.org/rfc/rfc1014.txt"
title="XDR: External Data Representation Standard"
>RFC 1014, <em>XDR: External Data Representation Standard</em> <img src="offsite.gif" tppabs="http://www.python.org/doc/current/icons/offsite.gif"
border='0' class='offsitelink' height='15' width='17' alt='[off-site link]'
></a>
<dd>This RFC
defined the encoding of data which was XDR at the time
this module was originally written. It has
appearantly been obsoleted by <a class="rfc" name="rfcref-47514"
href="javascript:if(confirm('http://www.ietf.org/rfc/rfc1832.txt \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ietf.org/rfc/rfc1832.txt'" tppabs="http://www.ietf.org/rfc/rfc1832.txt">RFC 1832 <img src="offsite.gif" tppabs="http://www.python.org/doc/current/icons/offsite.gif"
border='0' class='offsitelink' height='15' width='17' alt='[off-site link]'
></a>.
</dl>
<P>
<dl compact class="seerfc">
<dt><a href="javascript:if(confirm('http://www.ietf.org/rfc/rfc1832.txt \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ietf.org/rfc/rfc1832.txt'" tppabs="http://www.ietf.org/rfc/rfc1832.txt"
title="XDR: External Data Representation Standard"
>RFC 1832, <em>XDR: External Data Representation Standard</em> <img src="offsite.gif" tppabs="http://www.python.org/doc/current/icons/offsite.gif"
border='0' class='offsitelink' height='15' width='17' alt='[off-site link]'
></a>
<dd>Newer RFC
that provides a revised definition of XDR.
</dl>
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<P>
<p><hr>
<!--Table of Child-Links-->
<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>
<UL>
<LI><A NAME="tex2html4551"
href="xdr-packer-objects.html" tppabs="http://www.python.org/doc/current/lib/xdr-packer-objects.html">12.9.1 Packer Objects </A>
<LI><A NAME="tex2html4552"
href="xdr-unpacker-objects.html" tppabs="http://www.python.org/doc/current/lib/xdr-unpacker-objects.html">12.9.2 Unpacker Objects </A>
<LI><A NAME="tex2html4553"
href="xdr-exceptions.html" tppabs="http://www.python.org/doc/current/lib/xdr-exceptions.html">12.9.3 Exceptions </A>
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