span class="n">parent</span><span
            class="o">.</span><span class="n">left</span> <span class="o">=</span> <span class="bp">self</span><span
            class="o">.</span><span class="n">_remove</span><span class="p">(</span><span class="n">node</span><span
            class="p">)</span>
            <span class="c1"># # UPDATE SIZE OF PARENTS</span>
            <span class="c1"># p = node.parent</span>
            <span class="c1"># while p:</span>
            <span class="c1">#     p.update_size(