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<h1 align="center"><a href="../index.html">Boost.Python</a></h1>
<h2 align="center">Header <boost/python/module.hpp></h2>
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<h2>Contents</h2>
<dl class="page-index">
<dt><a href="#introduction">Introduction</a>
<dt><a href="#macros">Macros</a>
<dd>
<dl class="page-index">
<dt><a href=
"#BOOST_PYTHON_MODULE-spec">BOOST_PYTHON_MODULE</a>
</dl>
<dt><a href="#examples">Example(s)</a>
</dl>
<hr>
<h2><a name="introduction"></a>Introduction</h2>
<p>This header provides the basic facilities needed to create a
Boost.Python extension module.
<h2><a name="macros"></a>Macros</h2>
<p><a name=
"BOOST_PYTHON_MODULE-spec"><code>BOOST_PYTHON_MODULE(name)</code></a>
is used to declare Python <a href=
"http://www.python.org/doc/2.2/ext/methodTable.html#SECTION003400000000000000000">
module initialization functions</a>. The <code>name</code> argument must
exactly match the name of the module to be initialized, and must conform to
Python's <a href=
"http://www.python.org/doc/2.2/ref/identifiers.html">identifier naming
rules</a>. Where you would normally write
<pre>
extern "C" void init<i>name</i>()
{
...
}
</pre>
Boost.Python modules should be initialized with
<pre>
BOOST_PYTHON_MODULE(<i>name</i>)
{
...
}
</pre>
This macro generates two functions in the scope where it is used:
<code>extern "C" void init<i>name</i>()</code>,
and <code>void init_module_<i>name</i>()</code>, whose body must
follow the macro invocation. <code>init_<i>name</i></code> passes
<code>init_module_<i>name</i></code> to <code><a
href="errors.html#handle_exception-spec">handle_exception</a>()</code> so
that any C++ exceptions generated are safely processeed. During the
body of <code>init_<i>name</i></code>, the current <code><a
href="scope.html#scope-spec">scope</a></code> refers to the module
being initialized.
<h2><a name="examples"></a>Example(s)</h2>
<p>C++ module definition:
<pre>
#include <boost/python/module.hpp>
BOOST_PYTHON_MODULE(xxx)
{
throw "something bad happened"
}
</pre>
Interactive Python:
<pre>
>>> import xxx
Traceback (most recent call last):
File "<stdin>", line 1, in ?
RuntimeError: Unidentifiable C++ Exception
</pre>
<p>Revised
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
13 November, 2002
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
<p><i>© Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
Abrahams</a> 2002. </i> Distributed
under the Boost Software License, Version 1.0. (See accompanying file
LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)</p>
