lass="n">apply</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">log</span><span class="p">,</span> <span class="n">axis</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
  <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">df</span><span class="o">.</span><span class="n">index</span><span class="p">)</span> <span class="o">&gt;</span> <span class="mi">1000</span><span class="p">:</span>
    