n class="o">=</span> <span class="s1">&#39;&#39;</span>
  <span class="n">minimum</span> <span class="o">=</span> <span class="n">df</span><span class="o">.</span><span class="n">min</span><span class="p">()</span><span class="o">.</span><span class="n">min</span><span class="p">()</span>
  <span class="n">maximum</span> <span class="o">=</span> <span class="n">df</span><span class="o">.</span><span class="n">max</span><span class="p">()</span><span class="o">.</span><span class="n">max</span><span class="p