premiere-libtorrent/docs/python_binding.html

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<h1 class="title">libtorrent python binding</h1>
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<tr><th class="docinfo-name">Author:</th>
<td>Arvid Norberg, <a class="last reference" href="mailto:arvid&#64;rasterbar.com">arvid&#64;rasterbar.com</a></td></tr>
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<div class="contents topic" id="table-of-contents">
<p class="topic-title first"><a name="table-of-contents">Table of contents</a></p>
<ul class="simple">
<li><a class="reference" href="#building" id="id1" name="id1">building</a></li>
<li><a class="reference" href="#using" id="id2" name="id2">using</a></li>
</ul>
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<div class="section">
<h1><a id="building" name="building">building</a></h1>
<p>Building the libtorrent python bindings will produce a shared library (DLL)
which is a python module that can be imported in a python program.</p>
<p>The only supported build system for the bindings are currently boost build. To
set up your build environment, you need to add some settings to your
<tt class="docutils literal"><span class="pre">$BOOST_BUILD_PATH/user-config.jam</span></tt>.</p>
<p>Make sure your user config contains the following line:</p>
<pre class="literal-block">
using python : 2.3 ;
</pre>
<p>Set the version to the version of python you have installed or want to use. If
you've installed python in a non-standard location, you have to add the prefix
path used when you installed python as a second option. Like this:</p>
<pre class="literal-block">
using python : 2.3 : /usr ;
</pre>
<p>The bindings require <em>at least</em> python version 2.2.</p>
<p>For more information on how to install and set up boost-build, see the
<a class="reference" href="building.html#step-2-setup-bbv2">building libtorrent</a> section.</p>
<p>Once you have boost-build set up, you cd to the <tt class="docutils literal"><span class="pre">bindings/python</span></tt>
directory and invoke <tt class="docutils literal"><span class="pre">bjam</span></tt> with the apropriate settings. For the available
build variants, see <a class="reference" href="building.html#step-3-building-libtorrent">libtorrent build options</a>.</p>
<p>For example:</p>
<pre class="literal-block">
$ bjam dht-support=on release link=static
</pre>
<p>On Mac OS X, this will produce the following python module:</p>
<pre class="literal-block">
bin/darwin-4.0/release/dht-support-on/link-static/logging-none/threading-multi/libtorrent.so
</pre>
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<div class="section">
<h1><a id="using" name="using">using</a></h1>
<p>The python interface is nearly identical to the C++ interface. Please refer to
the <a class="reference" href="manual.html">main library reference</a>.</p>
<p>For an example python program, see <tt class="docutils literal"><span class="pre">client.py</span></tt> in the <tt class="docutils literal"><span class="pre">bindings/python</span></tt>
directory.</p>
<p>A very simple example usage of the module would be something like this:</p>
<pre class="literal-block">
import libtorrent as lt
import time
ses = lt.session()
ses.listen_on(6881, 6891)
e = lt.bdecode(open(&quot;test.torrent&quot;, 'rb').read())
info = lt.torrent_info(e)
h = ses.add_torrent(info, &quot;./&quot;, compact_mode = True)
while (not h.is_seed()):
s = h.status()
state_str = ['queued', 'checking', 'connecting', 'downloading metadata', \
'downloading', 'finished', 'seeding', 'allocating']
print '%.2f%% complete (down: %.1f kb/s up: %.1f kB/s peers: %d) %s' % \
(s.progress * 100, s.download_rate / 1000, s.upload_rate / 1000, \
s.num_peers, state_str[s.state])
time.sleep(1)
</pre>
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