="p">(</span><span class="n">itemJ</span><span class="p">)</span>
                    <span class="n">tidSets</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">y1</span><span class="p">)</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">_Generation</span><span class="p">(</span><span class="n">itemSetX</span><span class="p">,</span> <span class="n">itemSets</span><span class="p">,</span> <span class="n">tidSets</span><span