                           <span class="k">if</span> <span class="n">rhasattr</span><span class="p">(</span><span class="n">child</span><span class="o">.</span><span class="vm">__class__</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span>
                                <span class="n">rsetattr</span><span class="p">(</span>
                                    <span class="n">child</span><span class="o">.</span><span class="vm">__class__</span><span class="p">,</span>
        