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<title>Writing an applet in languages other than C</title>
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<div class="titlepage"><div><div><h2 class="title">
<a name="getting-started.introspection"></a>Writing an applet in languages other than C</h2></div></div></div>
<p>
     The Panel Applet library comes with support for <a class="ulink" href="http://live.gnome.org/GObjectIntrospection" target="_top">GObject Introspection</a>. This makes it possible to write applets in the languages that have <a class="ulink" href="http://live.gnome.org/GObjectIntrospection/Users" target="_top">bindings based on GObject Introspection</a>.
    </p>
<p>
     Here is a simple example of a python applet:

     </p>
<div class="example">
<a name="id-1.3.10.3.1"></a><p class="title"><b>Example 4. Hello World applet, in Python</b></p>
<div class="example-contents">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
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        <td class="listing_lines" align="right"><pre>1
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        <td class="listing_code"><pre class="programlisting">from gi<span class="gtkdoc opt">.</span>repository import Gtk
from gi<span class="gtkdoc opt">.</span>repository import PanelApplet

def <span class="function">applet_fill</span><span class="gtkdoc opt">(</span>applet<span class="gtkdoc opt">):</span>
    label <span class="gtkdoc opt">=</span> Gtk<span class="gtkdoc opt">.</span><span class="function">Label</span><span class="gtkdoc opt">(</span><span class="string">&quot;Hello World&quot;</span><span class="gtkdoc opt">)</span>
    applet<span class="gtkdoc opt">.</span><span class="function">add</span><span class="gtkdoc opt">(</span>label<span class="gtkdoc opt">)</span>
    applet<span class="gtkdoc opt">.</span><span class="function">show_all</span><span class="gtkdoc opt">()</span>

def <span class="function">applet_factory</span><span class="gtkdoc opt">(</span>applet<span class="gtkdoc opt">,</span> iid<span class="gtkdoc opt">,</span> data<span class="gtkdoc opt">):</span>
    <span class="keyword">if</span> iid <span class="gtkdoc opt">!=</span> <span class="string">&quot;HelloWorldApplet&quot;</span><span class="gtkdoc opt">:</span>
       <span class="keyword">return</span> False

    <span class="function">applet_fill</span><span class="gtkdoc opt">(</span>applet<span class="gtkdoc opt">)</span>

    <span class="keyword">return</span> True

PanelApplet<span class="gtkdoc opt">.</span>Applet<span class="gtkdoc opt">.</span><span class="function">factory_main</span><span class="gtkdoc opt">(</span><span class="string">&quot;HelloWorldFactory&quot;</span><span class="gtkdoc opt">,</span>
                                PanelApplet<span class="gtkdoc opt">.</span>Applet<span class="gtkdoc opt">.</span>__gtype__<span class="gtkdoc opt">,</span>
                                applet_factory<span class="gtkdoc opt">,</span> None<span class="gtkdoc opt">)</span></pre></td>
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</div>
<p><br class="example-break">
    </p>
<p>
     The only limitation of writing an applet in a language other than C is that the applet will not be able to run in the panel process: it will have to stay out-of-process. However, since it is recommended to leave applets out-of-process, this limitation is mitigated.
    </p>
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