"n">subtree</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">&gt;=</span> <span class="bp">self</span><span class="o">.</span><span class="n">minUtil</span><span class="p">]</span>

        <span class="k">return</span> <span class="n">filtered_transactions</span><span class="p">,</span> <span class="n">primary</span><span class="p">,</span> <span class="n">secondary</span>
    

    <span class="k">def</span> <span class="nf">_binarySearch</span><span class="