="n">euler_tour</span> <span class="o">=</span> <span class="n">euler_tour_from_edge_list</span><span
            class="p">(</span><span class="n">edge_list</span><span class="p">)</span>
    <span class="n">ETT</span> <span class="o">=</span> <span class="n">EulerTourTree</span><span class="p">()</span>
    <span class="n">tree_edge_2_node</span> <span class="o">=</span> <span class="n">defaultdict</span><span
            class="p">(</span><span class="nb">list</span><span class="p">)</span>
    <span cla