">f</span><span class="o">.</span><span class="n">drop</span><span class="p">([</span><span class="s2">&quot;l_orderdate&quot;</span><span class="p">,</span> <span class="s2">&quot;l_orderkey&quot;</span><span class="p">])</span>
</code></pre></div>
    <p>This will now fail, since you dropped l_orderdate</p>
    <div class="highlight"><pre><span></span><code><span class="gp">&gt;&gt;&gt; </span><span class="n">f</span> <span class="o">=</span> <span class="n">f</span><span class="o">.</span><span class="n"