s="p">(</span><span class="n">ddof</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span>

    <span class="n">df</span><span class="o">.</span><span class="n">dropna</span><span class="p">(</span><span class="n">inplace</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
    <span class="k">return</span> <span class="n">df</span></div>
</pre></div>

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