an><span class="n">tidSetJ</span><span class="p">))</span>
                <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">getPer_Sup</span><span class="p">(</span><span class="n">y1</span><span class="p">)</span> <span class="o">&lt;=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_maximum</span><span class="p">:</span>
                    <span class="n">itemSets</span><span class="o">.</span><span class="n">append</span><span class