thList</span> <span class="o">=</span> <span class="p">[</span><span class="nb">len</span><span class="p">(</span><span class="n">s</span><span class="p">)</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">database</span><span class="o">.</span><span class="n">values</span><span class="p">()]</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">utility</span> <span class="o">