
            class="n">right</span>

        <span class="n">T_left</span><span class="o">.</span><span class="n">parent</span> <span
            class="o">=</span> <span class="kc">None</span>
        <span class="n">T_left</span> <span class="o">=</span> <span class="n">EulerTourTree</span><span
            class="p">(</span><span class="n">root</span><span class="o">=</span><span class="n">T_left</span><span
            class="p">)</span>
        <span class="n">T_left</span><span class="o">.</span><span