"n">datab</span><span class="p">[</span><span class="o">...</span><span class="p">,</span><span class="mi">1</span><span class="p">:</span><span class="mi">2</span><span class="p">]</span>
    <span class="k">else</span><span class="p">:</span>
        <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">Lb</span><span class="p">,</span><span class="nb">list</span><span class="p">):</span>
            <span class="n">Lb</span> <span class="o">=</span> <span cla