pan class="o">=</span> <span class="n">single</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">_idx</span> <span class="o">=</span> <span class="n">idx</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">_n_points</span> <span class="o">=</span> <span class="n">n_points</span>

        <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_single</span> <span class="ow">is</span> <span class="kc">True</s