uct UnarySquare to Python as a class, and let ud be the class object.</p>
<div class="highlight-c++"><div class="highlight"><pre><span></span><span class="n">p</span><span class="o">::</span><span class="n">object</span> <span class="n">ud</span> <span class="o">=</span> <span class="n">p</span><span class="o">::</span><span class="n">class_</span><span class="o">&lt;</span><span class="n">UnarySquare</span><span class="p">,</span> <span class="n">boost</span><span class="o">::</span><span class="n">shared_