span class="n">load_school_demographics</span><span class="p">()</span>
    <span class="n">df</span> <span class="o">=</span> <span class="n">df</span><span class="p">[</span><span class="n">df</span><span class="o">.</span><span class="n">ay</span> <span class="o">==</span> <span class="n">df</span><span class="o">.</span><span class="n">ay</span><span class="o">.</span><span class="n">max</span><span class="p">()]</span>
    <span class="n">out_dir</span> <span class="o">=</span> <span class="n">os</span