ss="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">n</span> <span
            class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span
            class="n">euler_tour</span><span class="p">):</span>
        <span class="n">node</span> <span class="o">=</span> <span class="n">ETT</span><span class="o">.</span><span
            class="n">insert</span><span class="p">(</span><span class="n">data</span><span class="o">=</span><span
            class="n