class="n">isnull</span><span class="p">()</span><span class="o">.</span><span class="n">sum</span><span class="p">()</span>
  <span class="n">mis_val_percent</span> <span class="o">=</span> <span class="n">df</span><span class="o">.</span><span class="n">isnull</span><span class="p">()</span><span class="o">.</span><span class="n">sum</span><span class="p">()</span><span class="o">/</span><span class="nb">len</span><span class="p">(</span><span class="n">df</span><span class="p">)</span>
  <span class="n">m