                 <span class="n">temp</span> <span class="o">+=</span> <span class="n">val</span><span class="p">[</span><span class="n">i</span><span class="p">]</span>

        <span class="n">primary</span> <span class="o">=</span> <span class="p">[</span><span class="n">key</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">subtree</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span> <span class="k">if</span> <span class=