<span class="n">matches</span> <span class="o">=</span> <span class="p">[]</span>
        <span class="k">for</span> <span class="n">k</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="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">key_has_item</span><span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">item</span><span class=