.</span><span class="n">DataFrame</span><span class="p">(</span>
        <span class="n">mapping</span><span class="p">,</span> <span class="n">columns</span><span class="o">=</span><span class="p">[</span><span class="s2">&quot;i&quot;</span><span class="p">,</span> <span class="s2">&quot;A_i&quot;</span><span class="p">,</span> <span class="s2">&quot;j&quot;</span><span class="p">,</span> <span class="s2">&quot;A_j&quot;</span><span class="p">]</span>
    <span class="p">)</span></div>


<div class="viewc