ial">,</span> <span class="identifier">is_cached</span><span class="special">);</span>
   <span class="identifier">def</span><span class="special">(</span><span class="string">"set_cache"</span><span class="special">,</span> <span class="identifier">set_cache</span><span class="special">);</span>

   <span class="comment">// register Noddy lvalue converter</span>
   <span class="identifier">lvalue_from_pytype</span><span class="special">&lt;</span><span class="identifier">extract_identity</span><span class=