 class="k">def</span> <span class="nf">roots</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="k">return</span> <span class="n">np</span><span class="o">.</span><span class="n">asarray</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">obj</span><span class="o">.</span><span class="n">rx</span><span class="p">(</span><span class="s2">&quot;roots&quot;</span><span class="p">)[</span><span class="mi">0</span>