ass="o">.</span><span class="n">nan</span><span class="p">)</span><span class="o">.</span><span class="n">dropna</span><span class="p">(</span><span class="n">how</span><span class="o">=</span><span class="s2">&quot;all&quot;</span><span class="p">)</span>
  <span class="n">var</span> <span class="o">=</span> <span class="n">df</span><span class="o">.</span><span class="n">var</span><span class="p">()</span>
  <span class="n">minimum</span> <span class="o">=</span> <span class="n">var</span><span class="o">