an> <span class="o">=</span> <span class="n">exams</span><span class="o">.</span><span class="n">load_ela</span><span class="p">()</span>
<span class="n">math</span> <span class="o">=</span> <span class="n">exams</span><span class="o">.</span><span class="n">load_math</span><span class="p">()</span>
</pre></div>
</div>
</div>
</div>
<section id="merging-data">
<h2>Merging Data<a class="headerlink" href="#merging-data" title="Permalink to this headline">#</a></h2>
<p>When two data sets have a shared key then