><span class="n">df</span><span class="o">.</span><span class="n">price</span> <span class="o">&lt;</span> <span class="n">lower</span><span class="p">)),</span> <span class="s1">&#39;price&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
    <span class="c1"># Reporting the points cleaned</span>
    <span class="k">if</span> <span class="n">df</span><span class="o">.</span><span class="n">price</span><span class="o">.</span><span class="n">isnull</span><span class="