to be integer values, and you only need</span>
<span class="sd">    to specify the values.</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span>
            <span class="bp">self</span><span class="p">,</span>
            <span class="n">properties</span><span class="p">,</span>
            <span class="n">flatten</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
            <span class="