    </span><span class="sd">&quot;&quot;&quot;Evaluates this literal - returns the feature given by index.&quot;&quot;&quot;</span>
        <span class="k">return</span> <span class="n">X</span><span class="p">[:,</span> <span class="bp">self</span><span class="o">.</span><span class="n">index</span><span class="p">]</span>

    <span class="k">def</span> <span class="nf">_get_label</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">feature_names</span><span c