span class="p">(</span><span class="n">l</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span><span class="p">):</span>
            <span class="n">c</span> <span class="o">=</span> <span class="n">_ab</span><span class="o">.</span><span class="n">_itertools</span><span class="o">.</span><span class="n">combinations</span><span class="p">(</span><span class="n">l</span><span class="p">,</span> <span class="n">i</span><span class="p">)</span>
            <span class="k">for</span>