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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Appendix B. Packaging Tools</title><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="home" href="index.html" title="Debian Python Policy" /><link rel="up" href="index.html" title="Debian Python Policy" /><link rel="prev" href="build_dependencies.html" title="Appendix A. Build Dependencies" /><link rel="next" href="upgrade.html" title="Appendix C. Upgrade Procedure" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Appendix B. Packaging Tools</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="build_dependencies.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="upgrade.html">Next</a></td></tr></table><hr /></div><div class="appendix"><div class="titlepage"><div><div><h1 class="title"><a id="packaging_tools"></a>Appendix B. Packaging Tools</h1></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="section"><a href="packaging_tools.html#distutils">B.1. distutils</a></span></dt><dt><span class="section"><a href="packaging_tools.html#setuptools">B.2. setuptools</a></span></dt><dt><span class="section"><a href="packaging_tools.html#dh-python">B.3. <code class="literal">dh-python</code></a></span></dt><dt><span class="section"><a href="packaging_tools.html#pybuild">B.4. pybuild</a></span></dt><dt><span class="section"><a href="packaging_tools.html#cdbs">B.5. CDBS</a></span></dt><dt><span class="section"><a href="packaging_tools.html#pysupport">B.6. <code class="literal">python-support</code> (removed)</a></span></dt><dt><span class="section"><a href="packaging_tools.html#pycentral">B.7. <code class="literal">python-central</code> (removed)</a></span></dt></dl></div><p>
	This section describes the various tools to help package
	Python programs and modules for Debian. Although none of these
	tools are mandatory, their use is strongly encouraged, as the
	above policy has been designed with them in mind (and vice
	versa). This appendix is just an overview. If you use these
	tools, you should read their full documentation.
      </p><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="distutils"></a>B.1. distutils</h2></div></div></div><p>
	  The standard Python <code class="literal">distutils</code> module has been modified in
	  Debian to change the default installation directory of public
	  Python modules and to add a new flag to the <code class="literal">install</code>
	  command to override the default, <code class="literal">--install-layout=</code>.
	</p><p>
	  Public Python modules installed with a modified distutils default
	  to
	  <code class="filename">/usr/local/lib/python<em class="replaceable"><code>X</code></em>.<em class="replaceable"><code>Y</code></em>/dist-packages</code>
	  for Python 2.6 and later. This directory is seen by the
	  system-provided Python 2.6.
	</p><p>
	  When using a local Python installation, the default is
	  <code class="filename">/usr/local/lib/python<em class="replaceable"><code>X</code></em>.<em class="replaceable"><code>Y</code></em>/site-packages</code>
	  which is only seen by the local Python installation.
	</p><p>
	  Using the <code class="literal">--install-layout=deb</code> flag to
	  the <code class="literal">install</code> command of <code class="filename">setup.py</code> with a
	  system-provided Python 2.6 or later versions, Python modules will
	  be installed to
	  <code class="filename">/usr/lib/python<em class="replaceable"><code>X</code></em>.<em class="replaceable"><code>Y</code></em>/dist-packages</code>
	  which is only seen by the system-provided Python, not by a local
	  installation.
	</p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="setuptools"></a>B.2. setuptools</h2></div></div></div><p>
          The related Python <code class="literal">setuptools</code> module has been modified in
          Debian along the same lines as <code class="literal">distutils</code>.
        </p><p>
          Upstream focus on developments and improvements for Python packaging
          tools has largely shifted away from <code class="literal">distutils</code> and to
          <code class="literal">setuptools</code>.  They offer a similar API and at some point in
          the future, <code class="literal">setuptools</code> may fully replace <code class="literal">distutils</code>
          in Debian package builds.
        </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="dh-python"></a>B.3. <code class="literal">dh-python</code></h2></div></div></div><p>
	  <code class="literal">dh-python</code> provides extensions
	  for <code class="literal">debhelper</code> to make it easier to package
	  Python modules and extensions. They calculate Python dependencies,
	  add maintainer scripts to byte compile files, etc. Their use is
	  not mandatory, but they are recommended by the Debian Python
	  maintainers.
	</p><p>
	  See <code class="literal">man dh_python3</code> for details.
	</p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="pybuild"></a>B.4. pybuild</h2></div></div></div><p>
	  Pybuild is a Debian Python specific build system that invokes
	  various build systems for requested Python versions in order to
	  build modules and extensions. It supports automatically building
	  for multiple Python versions.
	</p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="cdbs"></a>B.5. CDBS</h2></div></div></div><p>
	  The CDBS <code class="filename">python-distutils.mk</code> class helps packaging of
	  distutils based Python packages.
	</p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="pysupport"></a>B.6. <code class="literal">python-support</code> (removed)</h2></div></div></div><p>
	  <code class="literal">python-support</code> provided another way to manage
	  Python modules. It has been removed from Debian Stretch and later
	  releases.
	</p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="pycentral"></a>B.7. <code class="literal">python-central</code> (removed)</h2></div></div></div><p>
	  <code class="literal">python-central</code> provided another way to manage
	  Python modules. It has been removed from Debian Jessie and later
	  releases.
	</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="build_dependencies.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="upgrade.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Appendix A. Build Dependencies </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Appendix C. Upgrade Procedure</td></tr></table></div></body></html>