="sd">        &quot;&quot;&quot;</span>
        <span class="n">items</span> <span class="o">=</span> <span class="p">[]</span>
        <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">keys</span><span class="p">():</span>
            <span class="n">items</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="p">(</span><span class="nb">len</span><span class="p">(</s